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Engineering Portfolio

Dr. Niall Padraig O’Sullivan BEng, PG Dip, MEng, PhD

February 18, 2015

Keywords: Computational Fluid Dynamics, Fluid Structure Interaction,Flow Distortion, Incompressible Flow, Large Eddy simulations, ReynoldsAveraged Navier Stokes Simulations, OpenFOAM, Turbulence Simulation,Wind-wave interactions, Flow Separation, Oceanography, Wind Turbines,Instrument Design, Data acquisition, Data Processing, Scientific and Engi-neering Publication.

Personal Statement: I hold a bachelors in biomedical engineering andmasters in mechanical engineering, which was based upon wind tunnel de-sign. The design was based upon CAD,CFD and experimental approaches.I used the CAD software Pro engineer, CFD software ANSYS- CFX. I amcurrently awaiting my viva for finalizing my Ph.D. in physics, which wasfocused on external aerodynamics and external wave interactions with re-search vessels in the open ocean using OpenFOAM CFD. I also used variousexperimental instruments in this project, some of which I constructed andinstalled myself. Some of these included sonic anemometers, pressure sen-sors, flow-meters, gps systems and temperature sensors. I also used variousdata logging software to control and collect data from these instruments. Ihave used various analytical tools and post processing including latex, MSOffice, Matlab, labview and paraview during this post.

I have also presented at 4 international conference in various forms suchas posters and oral presentations. I also have currently one scientific articlepublished, with another currently submitted awaiting review. From theposts i have held, i have extensive knowledge of various CAD/FEA and CFDsoftware. I have extensive knowledge of various experimental techniques andan extensive knowledge of aerodynamics, thermodynamics and design.

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1 BEng - Bachelors in Biomedical Engineering

Thesis: The Evaluation of Stainless Steels for Surgical Instrument Devel-opment.

Figure 1: (a) Pro Engineer stainless steel and nitinol weld with tantaluminter-metallic and (b) Pro Mechanica FEA maximum principal stress vectorplot in weld longitudinal direction.

Figure 2: (a) Pro Engineer WWII Corsair design PTC University Categorywinner 2006 and (b) Final design rendering of 3rd place design in WorldPTC Awards 2006.

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2 PG Dip - Post-Graduate Diploma in ComputerAided Engineering Product Design

Figure 3: Boeing 314 design for Foyens Flying Boat Museum Co Limerick,Ireland.

Figure 4: Pro Engineer modified 1967 Shelby GT500 and Hemi V8 designedfor Graduate Diploma in Computer Aided Product Design Technology.

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Figure 5: (a) Giant 255 BMX Pro frame mesh generated in ABAQUS and(b) FEA ABAQUS simulation plot of stress magnitude and displacement.

3 MEng - Master of Technology in Computer AidedEngineering Product Design

Thesis: Design, Manufacture and Evaluation of An Interactive Wind Tun-nel Using Computer Aided Technologies.

Figure 6: Low speed closed circuit transportable educational wind tunneldesigned for analysis of flow direction (streamlines) using a smoke particu-late.

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Figure 7: (a) Wind tunnel test section design with 3-component sting forcebalance, pitot static tube setup and force balance positioning system and(b) 3-Component sting balance design for lift,drag, normal force and axialforce measurement capability.

Figure 8: ANSYS CFX flow simulation of contraction cone velocity profileat test section entry.

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Figure 9: NI Labview interactive wind tunnel control system for fan speed,smoke particulate, manometer, sting balance strain gauges and sting balancepositioning system. Also shown are result displays for fan speed, test sectionvelocity, lift, drag, normal strain and axial strain.

4 Phd - Phd in Physics

Thesis: OpenFOAMr Computational Fluid Dynamics Studies on the Ocean-Atmosphere

Figure 10: CAD generated model and cross-sectional hex mesh surroundingthe superstructure of the R/V Knorr. Also inset is a photo of the bow-mastwith the instruments indicated (O’Sullivan et al., 2013).

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Figure 12: Bin averaged ratios between anemometers (a) A4/A5, (b) A2/A3and (c) A1/A6 over the full range of measured wind speeds and direction.Comparison of measured,measured bin averaged, numerical LES and nu-merical RANS ratios between anemometers (d) A4/A5, (e) A2/A3 and (f)A1/A6 as a function of wind speed for wind directions restricted to 0◦±5◦

to the bow.

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Figure 13: (a) and (c): Magnitude of deviation from the inputted 5 m s−1

at 0◦ to the bow for RANS and LES, respectively. (b) and (d): Magnitudeof Vector deviation from the mean airflow for RANS and LES surroundingthe meteorological mast, respectively.

26/06 03/07 10/070

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Measured Wave Height Data

Measured Wind Speed Data

Large et al (1995) Measured Wind Speed Correction

Wave2FOAM Measured Wind Speed Correction

Large et al (1995) Correction

Bin Averaged Large et al (1995)

Wave2FOAM Correction

Figure 14: (a) Measurements of wind speed from anemometer A5 and sig-nificant wave height from wave sensor W1, averaged over 15 minutes. (b)∆(uncorrected− corrected) Wind speed for two separate correction proce-dures. (c) Correction magnitudes for Large et al. (1995) and Wave2FOAMmodels (O’Sullivan et al., 2014).

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Figure 15: (a) A Vector plot of streamlines showing the flow deviation fromfree-stream and (b) A cross-sectional contour plot of the sensor locationsvelocity field turbulence.

Figure 16: Near wall tube streamlines of pressure deviations from mean flowsurrounding instrument.

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5 Activities in Practical Engineering

Figure 17: An OpenFOAM CFD study of a 1962 Austin Mini Cooper.

Figure 18: (a) Original 1989 Austin Mini 998cc engine and (b) Fully restoredand rebuilt mini engine.

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Figure 19: 1976 Opel Kadett C saloon restoration where welding, mechani-cal, electrical, body work and painting was conducted.

Figure 20: Fully restored 1976 Opel Kadett C.

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Figure 21: (a) Pro Engineer universal vertical door hinge design and (b)Wind/Wave test rig designed for experimental testing in lFermer, Breast,France.

Figure 22: (a) R/V Celtic Explorer Meteorological measurement mast in-stallation and (b) 3D Ultra-sonic Gill anemometer mounting design for R/VKnorr research field campaign.

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Figure 23: 3D wave measurement system design using MOXA data loggingsystem including GPS, motion sensors and 3 ultra-sonic altimeters.

References

O’Sullivan, N., Landwehr, S., and Ward, B.: Mapping flow distortion onoceanographic platforms using computational fluid dynamics, Ocean Sci-ence, 9, 855–866, doi:10.5194/os-9-855-2013, 2013.

O’Sullivan, N., Landwehr, S., and Ward, B.: Air-Flow Distortion and WaveInteractions: An Experimental and Numerical Comparison, Methods inOceanography, in Review, 2014.

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