Dr. Sam Mallinson is an Industrial Engineering Research Fellow in the School of Mechanical and Manufacturing Engineering. He has significant expertise in computational modelling, an in particular, use of open source computer-aided engineering tools, such as OpenFOAM, FreeCAD, Gmsh, FreeFem++, SurfaceEvolver paraview and python. He is also an experienced user of the ANSYS suite of tools.

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He can propose the following topics for thesis and HDR students:

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1. Aerosol capture
Many industrial, medical and biological processes produce highly mobile aerosols which can have deleterious effects. For example: in inkjet printing, stray aerosols can accumulate on machine internals and drip, resulting in print defects; dental operations produce highly mobile aerosols which make sophisticated personal protective equipment necessary
when operating on at-risk patients; human sneezing can increase the spread of viruses. This project has a number of aspects: literature review of biological (eg dental) aerosol size and velocity distribution; numerical simulation of generic particle-laden jets, including generic particle extraction methods (what kinds of extraction is required for given ranges of aerosol size and velocity distributions?); experimental testing of aerosol generator: characterizing size and velocity distribution; design of aerosol extraction unit for attachment to dental drills

2. Simulating droplet deposition for 3D printing
3D printing (aka additive manufacturing) holds great promise for rapid prototyping and component manufacture. In this project, the student will investigate the fluid mechanics of droplet deposition using CFD simulations.
Reference: https://www.researchgate.net/publication/328418662_Simulation_of_Droplet_Impact_and_Spreading_using_a_Simple_Dynamic_Contact_Angle_Model

3. Conjugate heat transfer modelling
Cooling of hot components by fluid flow is widely used in a number of industries. In this project, the student will use simulation codes to model the conjugate heat transfer (ie. fluid flow plus heat) in one or more simple situations of industrial relevance, for example, flow over a heated block in a channel (mimicking electronic cooling) and flow over a
backward facing step with downstream heated wall (which is a proxy for flow in an inkjet printhead).
Reference: https://www.researchgate.net/publication/334028691_Conjugate_Heat_Transfer_in_Thermal_Inkjet_Printheads

4. Experimental and numerical investigations of thermal inkjet droplet ejection
Thermal inkjet printers generate droplets by rapidly raising the temperature of a thin metallic film adjacent to a supply of ink. This causes the ink to flash boil, and the bubble thus formed forces the ink through a nozzle, forming a droplet. In this project, students will investigate a commercial inkjet printing system: experimental testing will consist of flow visualization using high speed cameras; numerical simulations will be performed using the open-source code OpenFOAM. Post-processing and analysis will use Python.
Reference: https://www.researchgate.net/publication/334028693_Numerical_Simulation_of_Thermal_Inkjet_Droplet_Ejection

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Journal Articles

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Mallinson SG; Mudford NR; Gai SL, 2020, 'Leading-edge bluntness effects in hypervelocity flat plate flow', Physics of Fluids, vol. 32, pp. 046106 - 046106, http://dx.doi.org/10.1063/1.5138205

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McBain GD, 2019, 'Three ways to compute multiport inertance', ANZIAM Journal, vol. 60, pp. C140 - C155, http://dx.doi.org/10.21914/anziamj.v60i0.14058

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Hillier R; Boyce RR; Creighton SA; Fiala A; Jackson AP; Mallinson SG; Soltani S; Williams S, 2013, 'Development of some hypersonic benchmark flows using CFD and experiment', Shock Waves, vol. 12, pp. 375 - 384, http://dx.doi.org/10.1007/s00193-003-0179-0

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Fiala A; Hillier R; Mallinson SG; Wijesinghe HS, 2006, 'Heat transfer measurement of turbulent spots in a hypersonic blunt-body boundary layer', Journal of Fluid Mechanics, vol. 555, pp. 81 - 111, http://dx.doi.org/10.1017/S0022112006009396

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Mallinson SG; Reizes JA; Hong G; Westbury PS, 2004, 'Analysis of hot-wire anemometry data obtained in a synthetic jet flow', Experimental Thermal and Fluid Science, vol. 28, pp. 265 - 272, http://dx.doi.org/10.1016/j.expthermflusci.2003.05.001

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Kwok CY; Mallinson SG; Reizes JA, 2003, 'Numerical Simulation of Micro-Fabricated Zero Mass-Flux Jet Actuators', Sensors and Actuators, vol. 105, pp. 229 - 236, http://dx.doi.org/10.1016/S0924-4247(03)00204-8

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Mallinson SG; Reizes JA; Hillier R, 2001, 'The Interaction between a Compressible Synthetic Jet and a Laminar Hypersonic Boundary Layer', Flow, Turbulence and Combustion, vol. 66, pp. 1 - 21, http://dx.doi.org/10.1023/A:1011468910521

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Mallinson SG; Reizes JA; Hong G, 2001, 'An experimental and numerical study of synthetic jet flow', Aeronautical Journal, vol. 105, pp. 41 - 49, http://dx.doi.org/10.1017/S0001924000095968

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Mallinson SG; Hillier R; Jackson AP; Kirk DC; Soltani S; Zanchetta M, 2000, 'Gun tunnel flow calibration: Defining input conditions for hypersonic flow computations', Shock Waves, vol. 10, pp. 313 - 322, http://dx.doi.org/10.1007/s001930000064

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Palma PC; Mallinson SG; O'Byrne SB; Danehy PM; Hillier R, 2000, 'Temperature measurements in a hypersonic boundary layer using planar laser-induced fluorescence', AIAA journal, vol. 38, pp. 1769 - 1772, http://dx.doi.org/10.2514/2.1172

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Mallinson SG; Gai SL; Mudford NR, 1997, 'The boundary layer on a flat plate in hypervelocity flow (vol 100, pg 135, 1996)', AERONAUTICAL JOURNAL, vol. 101, pp. 276 - 276, http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1997XQ87000006&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1

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Mallison SG; Gai SL; Mudford NR, 1997, 'An experimental Investigation of Hypervelocity Flow in a Conical Nozzle', Journal of Applied Science Research, vol. 57, pp. 81 - 93

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Mallison SG; Gai SL; Mudford NR, 1997, 'Establishment of Steady Separated Flow over a Compression Corner in a Free-Piston Shock Tunnel', Shock Waves, vol. 7, pp. 249 - 253, http://dx.doi.org/10.1007/s001930050080

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Mallison SG; Gai SL; Mudford NR, 1997, 'The interaction of a shock wave with a laminar boundary layer at a compression corner in high-enthalpy flows including real gas effects.', Journal of Fluid Mechanics, vol. 342, pp. 1 - 35, http://dx.doi.org/10.1017/S0022112097005673

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Mallinson SG; Gai SL; Mudford NR, 1996, 'An experimental investigation of hypervelocity flow in a conical nozzle', Flow, Turbulence and Combustion, vol. 57, pp. 81 - 93

1996, 'Leading-edge bluntness effects in high enthalpy, hypersonic compression corner flow', AIAA Journal, vol. 34, pp. 2284 - 2290, http://dx.doi.org/10.2514/3.13392

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Mallinson SG; Gai SL; Mudford NR, 1996, 'The boundary layer on a flat plate in hupervelocity flow', Aeronautical Journal, vol. 100, pp. 135 - 141

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Mallinson SG; Gai SL; Mudford NR, 1996, 'Upstream influence and peak heating in hypervelcotiy shock wave/Boundary layer interaction', Journal of Propulsion and Power, vol. 12, pp. 984 - 990, http://dx.doi.org/10.2514/3.24131