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Transcript of Mech-HT 120 Lect-01 Introduction
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Chapter 1
Introduction
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ANSYS MechanicalHeat Transfer
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Introduction
Training ManualWelcome! Welcome to theANSYS Workbench Mechanical Heat Transfertraining
course!
This training course covers the basics of using Mechanical in
performing thermal analyses. It is intended for all new or occasionalMechanicalusers, regardless
of the CAD software used.
Course Objectives:
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e prerequ s te ntro uct on to ec an ca tra n ng or equ va entexperience) is assumed.
This course is intended to expand on the thermal analysis capabilitiesoutlined in the introductory course material.
Some ANSYS Mechanical APDL features not directly exposed in theMechanical application will be covered.
Those users wishing to work in the classic (Mechanical APDL) interface
should consider taking Introduction to ANSYS Parts 1 and 2 Training
courses.
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Introduction
Training ManualCourse Materials
The Training Manual you have is an exact copy of the slides
Workshop descriptions and instructions are included
Numerous other ANSYS product training courses are available
See the latest training course schedule and locations on the ANSYShomepage www.ansys.com
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Introduction
Training ManualCourse Outline Chapter 1 Introduction
About ANSYS Workbench Overview Starting Simulation Workbench Products
Chapter 2 Heat Transfer Fundamentals
Symbols and Conventions
Heat Transfer Basics Characteristics of FEA Thermal
Solutions Boundary Conditions Thermal Structural Comparisons Workshop 1
Chapter 4 Continued . . .
Model Setup
Steady State Example
Multiple Step Solutions
Workshop 3
Chapter 5 Nonlinear Thermal Analysis Nonlinear Theory Nonlinear Solution Setup Solution Feedback Workshop 4
Chapter 6 Transient Analysis
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Approach Workbench Review Engineering Data Preprocessing in Mechanical Thermal Boundary Conditions Function Boundary Conditions Solution Setup Workshop 2
Chapter 4 Steady State ThermalAnalysis
Steady State Theory
Geometry Types
Thermal Elements
Time Stepping Transient Loading Transient Postprocessing Workshop 5
Appendix A1: Advanced Heat TransferTopics
ANSYS APDL Command Language Using Command Objects Named Selection Control
Surface to Surface Radiation Phase Change Workshop A1
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Introduction
Training ManualA. About ANSYS, Inc.ANSYS, Inc.
Developer of ANSYS family of products
Global Headquarters in Canonsburg, PA - USA (south of Pittsburgh)
Development and sales offices in U.S. and around the world
Publicly traded on NASDAQ stock exchange under ANSS
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Introduction
Training Manual ANSYS Family of ProductsANSYS Family of Products Analysis Capabilities:
Structural Mechanics
Fluid Dynamics
Explicit DynamicsElectromagnetics
Coupled Mutiphysics Analyses
Simulation Process and Data Management
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Introduction
Training Manual ANSYS Channel Partners
ANSYS Channel Partners
Sales and support network for ANSYS
Over 75 offices worldwide Local expertise for ANSYS consulting and training
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Introduction
Training ManualB. ANSYS Workbench Overview
What is ANSYS Workbench?
ANSYS Workbench provides powerful methods for interacting with theANSYS family of solvers.
ANSYS Workbench bi-directional parametric integration with CADsystems as well as supporting an entire range of CAD data sharing.
ANSYS Workbenchis comprised of various applications (someexamples): Mechanical for performing structural and thermal analyses using the ANSYS
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Geometry (DesignModeler) for creating and modifying CAD geometry to preparethe solid model for use in analysis applications.
Meshingfor generating Structural and CFD meshes.
Advanced CFDusing the Fluent and CFX solvers.
Design Explorationfor optimization.
Finite Element Modeler (FE Modeler) for translating a NASTRAN and ABAQUS
mesh for use in ANSYS. AUTODYN for explicit dynamics simulations featuring modeling of nonlinear
dynamics.
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Introduction
Training ManualC. ANSYS Mechanical Overview Analysis types available in Mechanical:
Structural (static and transient):
Linear and nonlinear structural analyses.
Dynamic Capabilities:
Modal, harmonic, random vibration, flexible and rigid dynamics.
Heat Transfer (steady state and transient):
Solve for temperature field and heat flux. Temperature-dependentconductivity, convection and materials allowed.
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Magnetostatic: Performs 3-D static magnetic field analysis.
Design Optimization:
Perform design of experiments and six sigma optimizations.
Indicates preferred designs using goals driven optimization techniques.
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Introduction
Training ManualD. Starting Mechanical There are two methods of launching Workbench:
From the Windows start menu:
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From the CAD system
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Introduction
Training ManualE. The Workbench Environment For most situations the Workbench GUI is divided into 2 primary
sections (there are other optional sections well see in a moment):
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The Toolbox The Project Schematic
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Introduction
Training ManualThe Toolbox The toolbox contains 4 subgroups:
Analysis systems: predefinedtemplates that can be placed in theschematic.
Component systems: various
applications that can be accessedto build, or expand, analysis
systems.
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us om ys ems: pre e ne
analysis systems for coupledapplications (FSI, thermal-stress,etc.). Users can also create their
own predefined systems.
Design Exploration: Parametric
management and optimizationtools.
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Introduction
Training Manual. . . The Toolbox The systems and components
displayed in the toolbox willdepend on the installed
products Using the check boxes in the
View All / Customizewindow, the items displayedin the toolbox can be to led
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on or off The toolbox customization
window is normally left closedwhen not in use
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Introduction
Training ManualThe Project Schematic
The Workbench project schematic is a graphical representation of theworkflow defining a system or group of systems
The workflow in the project schematic is always left to right
There are currently several applications which are native toWorkbench, meaning they run entirely in the Workbench window:
Project Schematic, Engineering Data and Design Exploration
Non-native a lications called data-inte rated run in their own
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window: Mechanical (formerly Simulation), Mechanical APDL (formerly ANSYS),
ANSYS Fluent, ANSYS CFX, Etc . . .
Blocks of cells can be deleted by RMB menu selection
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Introduction
Training Manual. . . The Project Schematic In this example a Static Structural analysis type is selected for the project
schematic
From the toolbox the selection can be dragged and dropped onto theschematic or simply double clicked
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Introduction
Training Manual. . . The Project Schematic By dropping applications and/or systems into various locations in the
schematic, an overall analysis project is defined
Connectors indicate the level of collaboration between systems
In the example below a structural system is dragged and droppedonto a thermal system at the Model cell (A4)
Before completing the operation notice there are a number ofoptional drop targets that will provide various types of linkage
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Introduction
Training Manual. . . The Project Schematic By completing the operation from the previous page, notice the
linkage here is only at the Model level and above
In this case there would be no thermal/structural coupling
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Notice too each system block is given and alphabetic designation (A,B, C, etc.)
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Introduction
Training Manual. . . The Project Schematic By dropping the structural system at the Solution level we obtain a
structural system that is coupled to the thermal solution
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Notice, the CandidateDrop Target
Indicates Data will be
Shared from FieldsA2 to A4, and
Transferred from A6
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Introduction
Training Manual. . . The Project Schematic A schematic can also be constructed by RMB and choosing to
Transfer Data To New or Transfer Data From New
In using this RMB transfer feature all transfer possibilities (upstream
and downstream) are displayed These selections will vary depending on which cell in a particular
system you highlight
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Introduction
Training ManualOptional Workbench Windows The View menu (and RMB) allows additional information to be
displayed in the Workbench environment
Below, the geometry is highlighted and the properties are displayed
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Introduction
Training ManualF. Workbench File Management Workbench creates a project file and a series of subdirectories to
manage all associated files.
Users should allow Workbench to manage the content of these
directories. Please do NOT manually modify the content or structureof the project directories.
When a project is saved a project file is created (.wbpj), using theuser specified file name (e.g. MyFile.wbpj).
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.
above example the directory would be MyFile_files. A number of subdirectories will be created in the project directory
(explained next).
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Introduction
Training Manual. . . Workbench File Management Archive: quickly generates a single
compressed file containing all pertinent files
File is zip format and can be opened using theRestore Archive . . . utility in WB2 or anyunzip program
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Several options are available when archivingsystems as shown here
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Introduction
Training ManualG. Working With Units The Units menu in Workbench:
Allows access to predefined unit systems
Allows the creation of custom unit systems
Controls unit display for Engineering Data,
Parameters and Charts Activate the Units System dialog to control
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Units can be Displayed in theActive Project System or asThey were Defined in TheirSource (e.g. CAD System)
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Introduction
Training Manual. . . Working With Units Create custom unit systems by duplicating existing systems then
modifying
Custom unit systems can be exported and imported
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Introduction
Training Manual. . . Simulation Overview The Simulation GUI is Tree-Driven:
Depending on what ishighlighted on the OutlineTree, the available options inthe Context Toolbar andDetails View will change. TheGra hics Window will also
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update to reflect the part of the
branch selected.
The Tree represents thedifferent aspects of thesimulation.
All Workbench modules are
Tree-Driven, so navigationthrough the GUI is donethrough selecting differentbranches of the Tree.
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Workshop 1 ThermalBar