scSTREAM V13 - Software Cradle Co., Ltd. · scSTREAM V13 release ... (Type B)1] at Z = 700 mm...

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scSTREAM V13

Introductory Seminar No. 2

scSTREAM V13 release

Windows 7 operating System

Applicability

Program Structure 4

Exercise: “Hospital Room” 5

– STpre 7

• Kicker 8

• Initial Wizard 12

• Mouse Operations 18

• Creating Parts 19

• Condition Wizard 74

• Mesh Generation 117

– STsolver 120

• Launching Simulation 121

• Monitor file 124

– STpost 131

Technical Support 155

Contents Page no.

scSTREAM: Basic Program Structure

Step1 Creating Input Data

Step2 Executing Calculation

Step3 Analyze/Visualize Resulting Solution

Solver

S file（*.s）

FLD file（*_N.fld）

TM file（*.csv）

CAB file（*.cab）

L file（*.l）

MON file（*.mon） Restart file

（*.r）

A hospital room is split into four sections by curtains. There are a patient, a bed, a TV and furniture in each section. Consider an air conditioner operating in the ceiling during the summer. We will analyze the temperature and flow distributions in the room.

Example: Hospital Room

Air 36C

Exterior Wall

Window

Ventilation (outflow)

Patient TV

Door Draft

Curtain

Ventilation (inflow:23C)

The objectives of this exercise are to master the following:

– The basic procedure of analysis

– The methods to create geometry and attributes

– Basic postprocessing techniques to visualize the results

Example: Hospital Room

Air 36C

Exterior Wall

Window

Ventilation (outflow)

Patient TV

Door Draft

Curtain

Ventilation (inflow:23C)

Operational procedure for STpre

Preprocessor

Initial Wizard for Basic Settings

Launch Pre

Create Geometry & Set Attributes

Generate Mesh

Save Files

Terminate Pre

Condition Wizard for Conditions

Launching STpre from the Kicker

– Select [Start] – [All Programs] – [Cradle] – scSTREAM V13 to open the Kicker

– Click preprocessor icon

Preprocessor

Window interface of STpre

– Initial Wizard opens automatically

Preprocessor

Menu bar

Tree/List-View Window

Control Window

Toolbar

Draw Window

Initial Wizard

Message Window

Tools for creating parts in STpre

Preprocessor

Create parts Parts creation methods

Coordinate systems for parts creation

Settings of Sketch Plane Sketch coordinates

Sketch Plane

– Each part has its own unique coordinate system

Preprocessor

Basic Parameters

– [Project name]: Enter “Exercise1”

– [Path to save files]: Click […] and specify your [Desktop] folder, then check the box for “Create project folder under the above directory”

– [Comments]: Enter “Hospital,heat,flow,steady”

– Click [Next]

Initial Wizard

Computational Domain

– Set the domain size equal to the size of the hospital room

• [Minimum value] = (0, 0, 0) mm

• [Maximum value] = (6000,5000,2500) mm

– Leave the [Material of computational domain] as “air (incompressible)”

Initial Wizard

Analysis Type

– No changes are needed

• [Flow] and [Heat] solvers are both selected

• [Turbulent flow] is considered, using the [Standard k-ε model]

• [Radiation] and [Solar radiation] are ignored

Initial Wizard

Initial Value/Gravity – [Default value of temperature]: [36] C ( – the ambient fluid temperature)

– [Initial temperature of solid]: [20] C

– Leave [Gravity] acting in the negative Z direction; buoyancy will be considered

– [Undefined region]

• Check the box for [Set the following conditions for undefined region]

Initial Wizard

Purpose of Analysis

– Choose between a list of general categories of simulation

• Typical boundary conditions will be applied, but they can still be modified later in the Condition Wizard

– Keep [No specification] in this exercise

Initial Wizard

Confirm Settings

– Check your settings, then click [Finish]

• The Computational Domain and the Sketch Plane will then appear in the Draw Window

Initial Wizard

Mouse/ Keyboard Operations

Key Operation

X Move to X-axis view (Y-Z plane)*

Y Move to Y-axis view (X-Z plane)*

Z Move to Z-axis view (X-Y plane)*

I Move to isometric view *

C + left-mouse Re-center the view

* Holding down the <Shift> key

at the same time will give the opposite view point

Creating the Analysis Geometry

1) Rack

– Make sure that <By Dialog> and <Global> are selected

– Select <Cuboid> from the toolbar

NOTE: The next 23 minutes of this webinar concerns the creation of parts. If you do not plan to create your own geometry in scSTREAM, you may want to move ahead to the 0:32:00 mark of the webinar.

Creating Parts

– [Part name]

• Enter [Rack]

– [Location] and [Size]

• Locate the cuboid at (0, 0, 0) mm

• Size of the part: (500, 500, 800) mm

– Click [OK] to close the [Part(Cuboid)] dialog

Creating Parts

2) Shelves

– In this section you create shelving units made of two parts in order to have ventilation outlets located on the lower shelves

– Create the first shelf manually, then create additional shelves using the [Translation/Copy Part] and [Create Group] functions

– First, select <Cuboid> from the toolbar

Creating Parts

– [Part name]

• Enter [Shelf]

• Locate the cuboid at (0, 2100, 0) mm

• Size of the part: (500, 800, 200) mm

– Click [OK] to close the dialog

– Click the part, [Shelf], in either the Draw Window or [Layout of Parts] tree to highlight it

– Right-click on the part and select [Translation/Copy Part] from the popup menu

– [Distance] – [Global coordinate system]

• Enter (0, 0, 200) mm

– [Translation only]

• Uncheck [Translation only] checkbox

– [The number of copies]

• Enter [1]

– Click [OK]

Creating Parts

– Change the size of the part duplicated in the previous step

– Click the duplicated part to highlight it, then right-click your mouse and select [Refer to Part] from the popup menu

– [Size]

• Enter [2300] in Z-direction

– Click [OK]

Creating Parts

– In this section, you will create the second set of shelves

– First, put [Shelf] and [Shelf[2]] into one group, then copy that group to create the second set of shelves

Creating Parts

Insert Parts into A Group File

1. Select parts in [Layout of Parts] tree while holding down <Ctrl> key for multiple selections.

2. Drag-and-drop them onto the group created above.

3. Select parts in [Layout of Parts] tree while holding down <Ctrl > key for multiple selections.

4. Right-click on your mouse and select [Change order: Copy] from the pop-up menu.

5. Select the group to insert the parts.

6. Right-click on your mouse and select [Change order; Append to group] from the pop-up menu.

Creating A Group File

1. Select [Parts] from [Layout of Parts] tree.

2. Right-click on [Parts] and select [Create Group]

– Copy and translate the group created in the previous step

– Select the group and right-click on your mouse

– Select [Translation/Copy Part] from the menu

• Enter (5500, 0, 0) mm

– [Translation only]

• Uncheck [Translation only] checkbox

• Enter [1]

– Click [OK]

Creating Parts

3) Bed – In this section you will create a bed on the Sketch Plane using mouse

operations.

– Select <By Mouse> and <Global> from the toolbar then adjust the Sketch Plane and the grid interval

Creating Parts

– The information of the Sketch Plane is displayed in the [Sketch] tab in the Control Window

– [Coordinate system]

• Make sure that (0, 0, 0) is entered for the origin

• Click on [Fit to computational domain]

– [Grid]

• Enter [100] for the grid intervals of (U),(V) and (W)

– Click [Update]

– The Sketch Plane is updated in the Draw Window …

Creating Parts

– Select <Cuboid> from the toolbar and click on the Sketch Plane in the Draw Window to create a part

– Select the created part in the Draw Window

– Right-click on your mouse and select [Part Edit Sketch] from the pop-up menu

Creating Parts

Relocating the part in the U-V plane – Move the mouse cursor to the center of the part and drag it to relocate Resizing the part in the U-V Plane – Move the mouse cursor on the vertex of a part and drag it to resize

Creating Parts

Resizing the part in the U-W plane

Press Y key to change the view direction while [Part Edit Sketch] is active

Right-click on your mouse and select [Display vertical sketch] from the pop-up menu

Sketch plane will be shown in the U-W plane

Modify by mouse in Z direction to set height = 500 mm

Right-click on your mouse and select [Part Update Sketch] to finalize the new size

– Open the [Part(Cuboid)] dialog by double-clicking the part

– [Part name]

• Enter [Bed]

• Confirm location is (0, 800, 0) mm

• Confirm the size is (2000, 1000, 500) mm

– Click [OK]

Creating Parts

4) Patient (Type A)

– In this section you will create a patient lying down in bed using the [Sketch Part] function

– Then you will apply a material property to the patient

– Select <By Mouse> and <Global> from the toolbar

Creating Parts

– Click on the top face of the bed in the Draw Window while holding the <P> key to move the Sketch Plane to that face

– Confirm that the origin of the Sketch Plane is (0, 0, 500) mm in the [Sketch] tab of the Control Window

Creating Parts

– Select <Sketch Part> from the toolbar

– [Model type]

• Select [Extrusion]

– [Geometry type of vertex]

• Select [Point sequence]

– [Vertices information]

• Enter the point sequence using mouse or keyboard

• Vertex information is on the next slide

– Check the box for [Close start and end points]

Creating Parts

① (0,1200)

② (200,1200)

③ (200,1100)

④ (1700,1100)

⑤ (1700,1500)

⑥ (200,1500)

⑦ (200,1400)

⑧ (0,1400)

– Vertex information

– Move to the [Size/Attribute] tab

• [Part name]

– Enter [Patient(TypeA)]

• [Type]

– Select [Solid]

• [Orientation]

– Select [W-Axis (Positive)]

• [Height]

– Enter [200]

• [Attribute]

– Select [Solid]

– Create “Human” material

» See next slide

• [Initial Temperature]

– Leave at [20] C for now

• Click [OK]

Creating Parts

– [List of Materials] dialog will open when you set [Attribute] to [Solid]

– Check [Editing mode] box to create and apply a new material property

– Right-click the [others] folder and select [Add(Material)] from the pop-up menu

– Enter the following properties in the [Solid] dialog:

• [Name]: Enter [Human]

• [Density]: Enter [1000] kg/m3

• Press [Set] to create the new material

• Press [Set] to close the [List of Materials] dialog

Creating Parts

5) Patient (Type B) – In this section you will create a patient sitting up in bed using the <By Mouse>

– You will create three parts on the picked location on the Sketch Plane, then integrate the three parts together using [Boolean Operation].

– Select <By Mouse> and <Global> from the toolbar

Creating Parts

– Confirm that the origin of the Sketch Plane is (0, 0, 500) mm

• Select <Cuboid> from toolbar and click on the Draw Window

• Adjust the location and size of the part:

• Open the [Part(Cuboid)] dialog

• [Part name]

– Enter [Patient(Type B)1]

• [Size]

– Confirm (200) mm in Z-direction

• Click [OK]

Creating Parts

U-V plane U-W plane

– Set the Sketch Plane on the top of [Patient (Type B)1] at Z = 700 mm

• [Part name]

• [Size]

• Click [OK]

Creating Parts

U-V plane U-W plane

– Set the Sketch Plane on the top of [Patient (Type B)2] at Z = 1100 mm

• [Part name]

• [Size]

• Click [OK]

Creating Parts

U-V plane U-W plane

– Integrate the parts using the [Boolean Operation] function

• Select [Edit] – [Boolean Operation] from the menu bar

• [Selected parts]

– Select [Patient(TypeB)1] and [Patient(TypeB)2] to be [Part A] and [Part B], respectively

• [Operation]

– Select [Unite(A+B)]

• Confirm that the parts are highlighted in the Draw Window, then click [Execute]

Creating Parts

– Integrate the rest of the parts using the [Boolean Operation] function

– Select [BOOL-Patient(Type B)1] and [Patient(TypeB)2] to be [Part A] and [Part B], respectively

• [Operation]

– Select [Unite(A+B)]

Creating Parts

– Open the [Part(Arbitrary Body)] dialog box for the patient (double-click on part in the tree) in order to apply settings:

• [Part name]

– Enter [Patient(TypeB)]

• [Attribute]

– Select [Solid]

• [Material]

– Select [Human]

• [Initial Temperature]

– Leave at [20] C for now

• Click [OK]

Creating Parts

6) Curtain – In this section you will create a curtain using the [Sketch Part] <Extrusion>

function

– The curtain will be separated into upper and lower parts

• Both parts are created as [Panel] parts

• “Condition region face” and “pressure loss” settings are applied to the upper part to represent the use of mesh material

Creating Parts

– Set the Sketch Plane to Z = 100 mm

– Select <Sketch Part> from the toolbar

• [Model type]

– Select [Extrusion]

• [Geometry type of vertex]

– Select [Point sequence]

• [Vertices information]

– Pick points on the Sketch Plane ; see table on the next page

Creating Parts

(U, V) mm

① (500, 2100)

② (2300, 2100)

③ (2300, 0)

– Move to the [Size/Attribute] tab

• [Part name]

– Enter [Curtain]

• [Type]

– Select [Panel]

• [Orientation]

– Select [W-Axis (Positive)]

• [Height]

– Enter [1900]

• Click [OK]

Creating Parts

– Create the mesh upper curtain using the [Translation/ Copy Part] function

• Right-click on the [Curtain] part and select [Translation/Copy Part] from the menu

• [Distance] – [Global coordinate system]

– Enter (0, 0, 1900) mm

• [Translation only]

– Uncheck [Translation only] checkbox

• [The number of copies]

– Enter [1]

• Click [OK]

Creating Parts

– Adjust the size of the upper curtain using [Part Edit Sketch]

• Open [Part (Sketch Part)] dialog box by double-clicking on the part

• [Part name]

– Enter [Curtain(mesh)]

• [Height]

– Confirm (500) mm

• [Attribute]

– Select [Condition region face]

• Click [OK]

Creating Parts

7) Television – In this section you will create a flat screen TV

– You can ignore the thickness of the TV and model it using a [Panel] part

– Since heat is generated by the TV, we will register the faces of the TV as a region and apply heat generation on it

– Create the TV in the <By Dialog> mode, assuming that its coordinates are known

– First, select <By Dialog> and <Global> from the toolbar

Creating Parts

– Select <Panel> from the toolbar:

• [Part name]

– Enter [TV]

• [Direction]

– Select [X-direction]

• [Location] and [Size]

– Locate the panel at (1500, 600, 800) mm

– Set the size of the part to (400, 400) mm

• Click [OK]

Creating Parts

– Select <Edit Part Face> in the toolbar

– [Part face name]

• Enter [TV_HeatGeneration]

– [Selected location]

• Click three times on the face of the TV in the Draw Window to select both front and back sides of the panel

• Confirm that both faces are indicated in the dialog box

• Confirm that two arrows are shown in the Draw Window

• Click [Register]

– Click [Close]

Creating Parts

8) Mirror Copy Parts

– One section of the room has now been completed

– Now create the three other sections of the room using the [Mirror Copy Parts] function

Creating Parts

– Create a group in the [Layout of Parts] tree

• Right click on “Parts” in tree and select “Create Group”

• Change the group name to make it more appropriate

– Select these 7 parts and move them into the [Section1] group:

• [Bed]

• [Rack]

• [Patient(TypeA)]

• [Patient(TypeB)]

• [Curtain]

• [Curtain(mesh)]

• [TV]

Creating Parts

Renaming A Group Name

1. Double-click on group from the tree

2. Change name to [Section1]

3. Click [OK]

– Select the [Section1] group in the [Layout of Parts] tree

– Select [Edit] – [Mirror Copy Parts] from the menu bar

– [Position of mirror]

• Select [X axis]

• Enter (3000) mm for the coordinate

– Click [OK]

Creating Parts

– Next make mirror copies in the Y axis direction

– Select the [Section1] and [MirrorGroup] groups in the [Layout of Parts] tree

– Select [Edit] – [Mirror Copy Parts] from the menu bar

– [Position of mirror]

• Select [Y axis]

• Enter (2500) mm for the coordinate

– Click [OK]

Creating Parts

9) Exterior Wall and Window Glass – In this section you will create exterior wall and window glass parts using [Panel]

parts, with the attribute set to “condition region face”

– Later, you will apply different heat transfer coefficients to the two parts, to account for their actual thicknesses and the thermal resistances of their respective materials

– The <Boolean Operation> function is used again in creating the exterior wall

– Select <By Dialog> and <Global> from the toolbar

Creating Parts

– Exterior Wall

• Select [Parts] from [Layout of Parts] tree to avoid creating a part inside a group

• Select <Panel> from the toolbar

– [Part name]: [Exterior_Wall]

– [Location]: (0, 5000, 0) mm

– [Size]: (6000, 2500) mm

– [Direction]: [Y-direction]

– [Attribute]: [Condition region face]

– Click [OK]

Creating Parts

– Window Glass

• Select <Panel> from the toolbar

– [Part name]: [Window_Glass]

– [Location]: (1000, 5000, 500) mm

– [Size]: (4000, 1800) mm

– [Direction]: [Y-direction]

– [Attribute]: [Condition region face]

– Click [OK]

Creating Parts

– Complete the Exterior Wall using the [Boolean Operation] function

• Select [Edit] – [Boolean Operation]

– Select [Exterior_Wall] and [Window_Glass] as [Part A] and [Part B], respectively

• [Operation]

– Select [Subtract(A-B)]

– Check the [Keep B] checkbox

• Click [Close]

Creating Parts

– Open the dialog for the [BOOL-Exterior_Wall] part

• Change the part name to [Exterior_Wall]

• Click [OK]

Creating Parts

10) Inlet – In this section you will create an air vent in the ceiling

– Create four inlets using panels in order to have air flow into the room in four directions

Creating Parts

– Select <Panel> from the toolbar

• [Part name]

– Enter [Inlet]

• [Direction]

– Select [Z-direction]

• Click [OK]

Creating Parts

– Repeat this procedure for the Y-direction to create another two inlets

– When viewed directly above (X-Y Plane), the four inlets will appear centered in the room

– Finally, create a group named [Unit_inlets] and put the four inlets into it

Creating Parts

– Create the other three inlets using the [Translation/Copy Parts] function

• Enter (250, 0, 0) mm

– Uncheck [Translation only] checkbox

• Enter [1]

– Click [OK]

11) Outlet – In this section you will create vents that will act as outlets for the room

– Each outlet uses a face of the shelves

• These faces will be registered as surface regions first

Creating Parts

– Select <Edit Part Face> from the toolbar

– [Part face name]

• Enter [Outlet1]

– [Selected location]

• Select the face of a lower shelf in the Draw Window

– Confirm the selected face in the dialog box and the selected direction in the Draw Window, then click [Register]

– Create the second surface region, [Outlet2], using the same procedure

– Click [Close]

Creating Parts

12) Door Draft – In this section you will create a door draft by assuming there is a gap

underneath a door

Creating Parts

– Select <Panel> from the toolbar

• [Part name]

– Enter [Door_Draft]

• [Direction]

– Select [Y-direction]

• [Attribute]

– Select [Condition region face]

• Click [OK]

Creating Parts

13) Setting a Virtual Part – The virtual part function can exclude a part from the computation without

deleting the part

– Two sections of the room will have the patient sitting up in bed with the curtains open; the other two sections will have the patient lying down, with the curtains closed

– The virtual part function is useful in this type of situation

Creating Parts

– Open [Part (Sketch Part)] dialog box for [Curtain]

– Check the box for [Virtual part]

– Click [OK]

Creating Parts

– Check the [Virtual part] box for three more parts together: One standard curtain and two mesh curtains

– Select [Curtain (Mesh)], [Curtain[2][2]], and [Curtain (Mesh)[2][2]] from the [Layout of Parts] tree

– Right-click on them and select [Change part setting together] from the pop-up menu

– On the left side of the [Change Settings] dialog box, select [Other settings]

– [Virtual part]

• Check box

• Select [Apply]

• Click [Set]

– Click [Close]

Creating Parts

– Open [Part (Sketch Part)] dialog box for [Patient(TypeA)]

– Check the box for [Virtual part]

– Click [OK]

– Similarly, check the [Virtual part] box for these three patients together: [Patient(TypeB)[2]], [Patient(TypeB)[3]], and [Patient(TypeA)[2][2]]

Creating Parts

When you create a new project, you can establish the detailed analysis conditions using the Condition Wizard

Open the Condition Wizard by selecting [Wizard] – [Condition Setting]

[Analysis Types]

– In this exercise, these settings remains unchanged from the Initial Wizard settings

– Click [Next]

Condition Wizard

[Basic Settings]

– These settings remain unchanged in this exercise

– Click [Next]

Condition Wizard

[Fluid Region]

– Click [Next]

Condition Wizard

[Flow]

– Click [Next]

Condition Wizard

[Heat]

– Click [Next]

Condition Wizard

[Initial Condition]

– Click [Next]

[Flow Boundary]

– Apply inlet boundary condition:

• Select [inlet] from the [Region name] list

• Click [Opening] under [New]

Condition Wizard

• [Condition name]

– Enter [inlet1]

• [Condition type]

– Select [Fixed velocity]

• Enter:

– [Velocity component X] = [-1] m/s

– [Velocity component Y] = [-1] m/s

– [Velocity component Z] = [-1] m/s

– [Inflow temperature] = [23] C

• Move to the [Turbulence] tab

Condition Wizard

• Check the box for [Inflow turbulence properties]

• Enter:

– [Turbulent kinetic energy] = [0.0001] m2/s2

– [Turbulent dissipation rate] = [0.0001] m2/s3

• Click [OK]

Condition Wizard

– Using the same procedure, apply flow conditions to inlet[2], inlet[2][2], and inlet[3]:

Condition Wizard

Region

Condition

Velocity

component

Turbulent

kinetic

energy

Turbulent

dissipation

Inflow

temperature X Y Z

inlet[2] inlet2 1 -1 -1 0.0001 0.0001 23

inlet[3] inlet3 -1 1 -1 0.0001 0.0001 23

inlet[2][2] inlet4 1 1 -1 0.0001 0.0001 23

– Apply a pressure condition to [Door_Draft]

• Select [Door_Draft] from the [Region name] list

Condition Wizard

– Enter [Open_Draft]

– Select [Fixed static pressure]

• Move to the [Turbulence] tab and apply values of [0.0001] to both parameters

• Click [OK]

Condition Wizard

– Apply an outflow condition to [Outlet1]

• Select [Outlet1] from the [Region name] list

– Enter [outlet1]

• Enter [-0.75] m/s for [Velocity component X]

• Click [OK]

Condition Wizard

– Apply an outflow condition to [Outlet2]

• Select [Outlet2] from the [Region name] list

– Enter [outlet2]

• Enter [0.75] m/s for [Velocity component X]

• Click [OK]

Condition Wizard

[Wall Boundary]

– Click [Next]

Condition Wizard

[Thermal Boundary]

– Apply thermal conditions to the window glass

• Select [Window_Glass] from the [Region name] list

• Click [Heat transfer] under [New]

– Enter [Window]

• Select [Heat transfer] and [Specify heat transfer coefficient]

• Set [Heat transfer coefficient] = [7] W/(m2･K)

• Click [OK]

Condition Wizard

– Apply thermal conditions to the exterior wall

• Select [Exterior_Wall] from the [Region name] list

• Click [Heat transfer] under [New]

Condition Wizard

– Enter [External_Wall]

• Select [Heat transfer] and [Specify heat transfer coefficient]

• Set [Heat transfer coefficient] = [1] W/(m2･K)

• Click [OK]

Condition Wizard

[Symmetrical Boundary]

– Click [Next]

[Source Condition]

– Move to the [Area Source Condition] tab

– Apply a pressure loss condition to the upper parts of the curtains

– Select these regions in the [Region name] list:

• [Curtain(mesh)]

• [Curtain(mesh)[2]]

• [Curtain(mesh)[2][2]]

• [Curtain(mesh)[3]]

– Click [Area pressure loss] under [New]

Condition Wizard

– [Condition name]

• Enter [PressureDrop]

– [Opening ratio]

• Enter [70] %, then press [Compute]

• The [Coefficient C] will be calculated as 3.27

– [Location]

• Confirm that [Flow-straightening effect] – [By panel] and [Internal] are selected

– Click [OK]

Condition Wizard

– Apply a heat source condition to the TVs

– Select these regions in the [Region name] list:

• [TV_HeatGeneration]

• [TV_HeatGeneration[2]]

• [TV_HeatGeneration[2][2]]

• [TV_HeatGeneration[3]]

– Click [Area heat source] under [New]

Condition Wizard

• Enter [TV_HeatSource]

– [Rate of heating]

• Enter [50] W

– Click [OK]

Condition Wizard

[Fixed Condition]

– Apply a fixed temperature to all patients

– Select all [Patient (Type**)] entries in the [Region name] list

– Click [Fixed temperature] under [New]

Condition Wizard

• Enter [FixedTemperature1]

– [Temperature]

• Enter [37] C

– Click [OK]

Condition Wizard

[Analysis Control]

– Select [Detailed setting]

– Click [Next]

Condition Wizard

[Steady-state Analysis]

– Enter [300] for [Last cycle no.]

– Click [Next]

Condition Wizard

[Solver Parameters]

– [Heat balance]

• Confirm [Consider heat balance] checkbox is checked

• Confirm [Assume difference in thermal conductivity for different parts] is selected

– These options are used to apply a heat balance correction when different materials have large differences in their thermal conductivities

Condition Wizard

[Output Condition] – [Field File]

– [Surface Data] tab

• Select [Coefficient of heat transfer] and [Heat flux]

• Click [Cancel]

– Only [Surface Temperature] is now selected for output

Condition Wizard

[Output Condition] – [L File]

– [Output variables]

• Select [Coefficient of eddy viscosity] then click [Output]

– Move to the [Flux Balance] tab

Condition Wizard

– [Information about flux balance]

• Confirm [Output information about flux balance] box is checked

Condition Wizard

[File Specification]

– [File Name] tab remains unchanged in this exercise.

– Move to the [Option (Field Output) ] tab

Condition Wizard

– Option [Field Output] tab remains unchanged in this exercise

• These settings can be used to control how often FLD files are output

Condition Wizard

[Setting Confirmation]

– Confirm your analysis settings, then click [Finish] to close the Condition Wizard

Condition Wizard

Reviewing Part Attributes and Conditions

– Open [List of Parts] dialog by clicking <Parts Table> on the toolbar

• Make sure the correct conditions are applied to the parts

• Note the non-standard material, “Human”

Condition Review

– Open the [Conditions] tab in the [Tree/List View] Window

Condition Review

Mesh Generation

– Opening [Mesh] dialog

• Select [Mesh] – [Gridding] from the menu bar

– [Method of Gridding]

• Set [Geometric ratio] = “(internal) 1.2”

• Set [Standard length] = “50, 50, 50” mm

– Click [Gridding]

– Check the number of elements

• Around 385k

– Click [Meshing] to complete mesh generation

– Click [Close]

Mesh Generation

Save the project file (*.cab)

– [File] – [Save]

• The CAB file contains all project information: Geometry, mesh and analysis conditions

• If you have the CAB file, you can always create the S file (see below)

Save the analysis conditions file (*.s)

– [File] – [Export…] ; select file name = “Exercise1.s” and [Save]

• Contains mesh and analysis conditions

• This file is read by the STsolver module

Exit STpre:

– [File] – [Exit]

• Select [No Save] for the CAB file as we just saved it

Preprocessor

Operational procedure for STsolver

Solver

Load S-file

Launch Solver

Execute calculation

Terminate Solver

Confirm end of calculation

STsolver – Launch STsolver from the scSTREAM

“Kicker”:

Schedule the calculation – Drag-and-drop S file into STsolver

– Use [File] – [Open] and select S file

Launch the calculation – [Job Status & Edit] dialog box will

now open, with your job highlighted:

– Click [Execute], then [Yes]

• The job will begin running

Solver

Monitoring the progress of the calculation

– Monitoring parts temperatures

Solver

– Monitoring convergence status

• Select [Display] – [Convergence status] from the menu bar

– The graph shows the relative fluctuation of each variable

Solver

– Monitoring minimum and maximum values

• Select [Display] – [Velocity min/max] from the menu bar

Solver

– Monitoring flux balance

• Select [Display] – [Flux balance] from the menu bar

Solver

– Monitoring matrix relative error

• Select [Display] – [Matrix relative error] from the menu bar

Solver

End of the calculation – When the calculation ends normally, a [Closing message] window appears,

displaying the time taken for the calculation and the number of cycles

– The calculation time and the number of cycles are also shown in the [Job Status & Edit] dialog

– Select [File] – [Exit] in the menu bar to exit the solver

• Click [Yes] to confirm

Solver

Open STpost – Launch STpost from STsolver by clicking on icon

• Last FLD file will be automatically loaded

• Launch STpost from the scSTREAM Kicker:

Import STsolver results – Drag and drop FLD file into STpost

– Use [File] – [Open] and select FLD file

• Must use this approach when adding an additional FLD file

STpost basics: – Double left-click on an object in the tree to open its dialog box

– To display/hide an object, use its checkbox in the tree

– To request motion control for a single object, toggle on the icon

Postprocessor

Initial view after loading the FLD file – After loading the FLD file into Post, the analysis geometry is shown in the Draw

Window and the tree structure is shown in the Control Window

– Each item in the tree, such as [Surface] and [Plane], is called an object

Postprocessor

Vector plot on a plane – Double click the [Plane] object in the tree to open its dialog box

– Open the [Coordinate] tab

– Select [Y-Axis] and set [Coordinate] = [2.5] m

Postprocessor

– Click the <Y> key to set the viewpoint perpendicular to the Y-axis

– Open the [Vector] tab

– Check the [Display] checkbox and confirm that [Variable] is set to [Velocity]

– Click the <Redraw> icon or right-click in the Draw Window

Postprocessor

Modifying the colorbar – Open the dialog for the [Colorbar] and go to the [Display] tab

• Select [Horizontal] to change from a vertical colorbar to a horizontal one

• Set the [Number of decimals] to [2]

– Open the [Range] tab and select [Min/Max of the drawing window] for the range

– Click the hand icon for the colorbar, then move it out of the way of the visualization

• Afterwards, don’t forget to reselect the hand icon for the FLD file

Postprocessor

Changing the length of the vectors – Open the [Plane] dialog and go to the [Vector] tab

– Under [Type], check the box for [Constant length]

– Under [Scale], set the [Length] to [0.3]

Postprocessor

Vector Animation (Steady-State)

– Click < I > to get an isometric view

– Under [Type], select [Animation]

– Click to start/stop the animation

– Note: This animation does not use transient data; it is the animation of the steady-state flow field

Postprocessor

Vector Animation (Transient)

– Note: The steps on this slide are not applicable for this exercise since this analysis is a steady-state case

– Under [Type], select [Standard]

– Open the dialog for the FLD file and go to the [Cycle] tab

– Double-click on the first cycle number in the [Cycle] column to switch the visualization to that FLD file

– Check the box for [Automatic selection], then press <Animation>

• The visualization will automatically step tough the set of FLD files, from the first cycle to the last cycle

Postprocessor

Temperature contours on a plane – Open the [Plane] dialog and go to the [Coordinate] tab

• Select a plane perpendicular to the [Z-Axis] and enter [1.25] m for the [Coordinate]

– Type the < Z > key to view from above

– On the [Contour] tab, check the box for [Display] and set the [Variable] to [Temperature]

– On the [MAT] tab, uncheck the box for [Human]; display temperature distribution of fluid region only

– Go to the [Range] tab of the temperature [Colorbar]; set the range to [Min/Max of the drawing window]

Postprocessor

Displaying contour lines – Open the [Plane] dialog and go to the [Contour] tab

– Uncheck the box for [Paint]

– Check the box for [Contour line] to display isolines of temperature

Postprocessor

Temperature contours on a surface – Uncheck the box next to [Plane] to hide this object

– Open the [Surface] dialog and go to the [MAT] tab

• Uncheck the box for [Air(20C)]

– On the [Contour] tab, check the [Display] box and set [Variable] to [Surface Temperature]

– Type < I > to get an isometric view, then zoom-in on one patient

Postprocessor

– Displaying surface temperature values at arbitrary points • On the [Pick] tab, check the box for [Scalar] and set [Variable] to [Surface

Temperature]

• Select arbitrary points by left-clicking on the patient

Postprocessor

Temperature isosurface – First reset the contour, pick and MAT settings for the [Surface] object

– Click <Create New ‘Isosurface’> on the toolbar

– On the [Variable] tab, set [Variable] to [Temperature]

– Set [Value] to [26] C

Postprocessor

– Displaying contours on the isosurface

• On the [Contour] tab, check the [Display] box and set [Variable] to [Magnitude of Velocity]

• On the [Range] tab of the temperature [Colorbar], set the range to [Min/Max of the drawing window]

• After inspecting this visualization, right-click on [Isosurface] in the tree and select [Delete]

Postprocessor

Streamlines – Before creating [Streamlines], open the [Region] tab for the [Surface] object

• Check the box for [Registered Surfaces] to show the inlet region boundary

– Click <Create New ‘Streamline’> on the toolbar

– On the [Starting Surface] tab, enter these values:

• Center: [3,2.5,2.5] m

• U: [0.5, 0, 0] m

• V: [0, 0.5, 0] m

Postprocessor

– Go to the [Starting Point] tab

• Select [Square] and set [No. of pts] to [4] for both [Horizontal] and [Vertical]

• Deselect the box for [Create only on perimeter]

Postprocessor

– Displaying contours on the streamlines

• Go to the [Contour] tab

• Check the box for [Display] and set [Variable] to [Magnitude of Velocity]

Postprocessor

Saving an image – Open the dialog for the [Camera] object

• On the [Format] tab, set the [Format] to [PNG]

– Click [Browse], then specify a folder and filename for the image

– Click [Save now]; the image in the Draw Window will be saved, with a confirmation message displayed in the [Message Window]

Postprocessor

Saving an animation of steady-state analysis results – On the [Format] tab, set the [Format] to [AVI]

– Click [Browse], then specify a folder and filename for the animation

– Click [Start]; after this, frames will be saved when the view in the Draw Window changes

– On the [Display] tab of the [Streamline] dialog, set the [Type] to [Airplane]

– Click to start the animation; after a few seconds, click again to end the animation

– Go back to the [Format] tab in the [Camera] dialog and click [End]

– The animation will be created and automatically played using Windows Media Player

Postprocessor

Saving the current status of STpost to an STA file

– Select [File] – [Save Current Status…] from the menu bar

– Select a folder and enter a filename

– Click [Save]

Postprocessor

Applying an STA file to an FLD file – Right-click on the FLD object in the tree, select [Close this file], then confirm

– Select [File] – [Open] from the menu bar and reload the same FLD file

– Select [File] – [Open] again, but now change [Files of type] to [Status files (*.sta)]

– Select the STA file saved in the previous step, then click [Open]

• The previous visualization status will be re-applied

– An STA file can be applied to any FLD file with the same geometry

Postprocessor

Exiting STpost

– Select [File] – [Exit] from the menu bar

Postprocessor

Please send your questions/comments to:

– support@cradle-cfd.com

Please use this “subject” line format in your e-mail:

– (US09-0099, Software name) Subject matter of question

– Replace “US09-0099” with your Username

– Software name will be “scSTREAM”

– Subject matter could be, for example, “meshing question”

Technical Support

Thank you for your attention!

We recommend that you work through:

– The Operation Manual

– Examples from the Exercise Manual for your areas of interest

Please also consider attending scSTREAM short courses

– These will help jump-start your productivity!

– Upcoming training schedules are listed at:

http://us.cradle-cfd.com/events/seminars.html

scSTREAM Basic Seminar includes these functions in detail:

– Radiation

– Solar Radiation

– Diffusion

– Air Conditioner Model

– Anemostat Model

– Ventilation Efficiency

– Land and Building Geometry

– Power Law Boundary Condition

– Forest Canopy Model

– Multiblock Mesh

– Zooming

scSTREAM V13 - Software Cradle Co., Ltd. · scSTREAM V13 release ... (Type B)1] at Z = 700 mm...

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