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Sajad Alimohammadi
Research Fellow, Mechanical & Manuf. Eng


Dr Sajad Alimohammadi received his PhD degree from Trinity College Dublin in 2015. His PhD research focused on the numerical and experimental characterization of fluid flow and heat transfer in unsteady impinging and co-flowing jet flows. He also explored the vortex dynamics of a pair of interacting synthetic jets issuing from adjacent slot orifices into the quiescent air using experimental (PIV) and numerical (CFD) techniques, with practical applications in active flow control and adaptive heat convection. Sajad graduated with a MSc (Eng) degree in 2010 from Sharif University of Technology. In 2011, he was appointed Research Assistant (Wissenschaftliche Mitarbeiter) at the Institute for Thermodynamics (Institut für Thermodynamik, IfT), Technische Universität Braunschweig, Germany, where he performed research on two-phase CO2 ejectors. In 2015, he was appointed Post-Doctoral Research Fellow at TCD and Adjunct Research Staff member at the NSF I/UCRC Cooling Technologies Research Center (CTRC) at Purdue University, USA, in collaboration with Intel Corporation. In the latter appointment, he investigated the applicability of low-noise air amplifier technology for data centre environments, using analytical modelling, LES-based CFD, Computational AeroAcoustics (CAA), and PIV. In 2016, his research was funded by Enterprise Ireland and Nokia/Alcatel-Lucent, in the development of reliable lightweight vapour chamber heat sinks for wireless communication applications. Sajad was recently awarded a prestigious Government of Ireland Postdoctoral Research Fellowship 2016 by the Irish Research Council, to continue his career as a Research Fellow at TCD.

Publications and Further Research Outputs

Peer-Reviewed Publications

Sajad Alimohammadi, Nicolas Baudin, Roger Kempers, Tim Persoons, Multi-Objective Shape Optimisation of Natural Convection Cooled Plate-Fin Heat Sinks with Localised Heat Sources, 2nd Thermal and Fluid Engineering Conference, TFEC2017, Las Vegas, NV, USA, April 2017, 2017 Conference Paper, 2017 URL

Nicolas Baudin, Sajad Alimohammadi, Roger Kempers, Tim Persoons, COMPARISON OF A TRADITIONAL HEAT SINK VERSUS A VAPOUR CHAMBER HEAT SINK COOLED BY FORCED CONVECTION, 2nd Thermal and Fluid Engineering Conference, TFEC2017, Las Vegas, NV, USA, April 2017, 2017 Conference Paper, 2017 URL

Richard Blythman,Sajad Alimohammadi,Tim Persoons, Nick Jeffers, Darina B. Murray, Parametric analysis of laminar pulsating flow in a rectangular channel, Heat and Mass Transfer, 2017, p1 - 10 Journal Article, 2017 URL DOI

Abdelsalam Y. O.; Alimohammadi S.; Pelletier Q.; Persoons Q., A multi-objective genetic algorithm optimisation of plate-fin heatsinks, IEEE /Therminic 2017, 23rd International Workshop on Thermal Investigations of ICs and Systems (THERMINIC), Amsterdam, Netherlands, IEEE, 2017 Conference Paper, 2017 URL

Sajad Alimohammadi, Eoin Fanning, Tim Persoons, Darina B. Murray, Computers & Fluids, Characterization of flow vectoring phenomenon in adjacent synthetic jets using CFD and PIV, 140, 2016, p232 - 246 Journal Article, 2016 URL

Sajad Alimohammadi, Eoin Fanning, Darina B. Murray and Tim Persoons, Fluid Flow & Heat Transfer in Adjacent Synthetic Jets, 14th UK Heat Transfer Conference, Edinburgh, 2015 Conference Paper, 2015 URL

Sajad Alimohammadi, Darina B. Murray and Tim Persoons, On the Numerical-Experimental Analysis and Scaling of Convective Heat Transfer to Pulsating Impinging Jets , International Journal of Thermal Sciences, 98, 2015, p296 - 311 Journal Article, 2015 DOI URL

Sajad Alimohammadi, A Validated Computational Fluid Dynamics Methodology for Characterisation of Fluid Flow & Heat Transfer in Unsteady Jets, The University of Dublin, Trinity College, 2015 Thesis, 2015 URL

Sajad Alimohammadi, Darina B. Murray and Tim Persoons, Experimental Validation of a Computational Fluid Dynamics Methodology for Transitional Flow Heat Transfer Characteristics of a Steady Impinging Jet, Journal of Heat Transfer, 136, (9), 2014, pp091703- Journal Article, 2014 URL URL DOI

Alimohammadi, S., Dinneen, P., Persoons, T., Murray, D.B. , Thermal management using pulsating jet cooling technology, Eurotherm Seminar 102: Thermal Management of Electronic Systems, Limerick, June 2014, 525, (1), Journal of Physics: Conference Series , 2014, pp012011- Conference Paper, 2014 TARA - Full Text DOI

Sajad Alimohammadi, Tim Persoons and Darina B. Murray, A numerical-experimental study of heat transfer enhancement using unconfined steady and pulsating turbulent air jet impingement, 15th Int. Heat Transfer Conference IHTC15, Kyoto, Japan, Sept. 2014, Begell Hourse, IHTC Digital Library, 2014 Conference Paper, 2014 URL URL DOI

Sajad Alimohammadi, Tim Persoons, Darina B. Murray, Mohamadreza S. Tehrani, Bijan Farhanieh and Juergen Koehler, A Validated Numerical-Experimental Design Methodology for a Movable Supersonic Ejector Compressor for Waste-Heat Recovery, Journal of Thermal Science and Engineering Applications, 6, (2), 2013, p021001- Journal Article, 2013 DOI URL URL

Sajad Alimohammadi, Moein Farmahini, Davar Derakhshan, Effects Of Various Prevalent Fuels On Spark-Ignition Engine Operation, 18th Int. Conf. on Mechanical Eng., ISME 2010, 2010 Conference Paper, 2010 URL URL

Sajad Alimohammadi, Mohamadreza S. Tehrani and Bijan Farhanieh, Analytical And Numerical Modeling Of Vapor Jet Refrigeration Cycle For Vehicle Air Conditioning, 18th Int. Conf. on Mechanical Eng., ISME 2010, 2010 Conference Paper, 2010 URL URL

Research Expertise


. Creative Experimental and Numerical Fluid Dynamics and Heat Transfer . Advanced CFD (Open Source and Commercial) . Particle Image Velocimetry . Renewable Energy Systems . Datacentre Electronics Thermal Management . Super-Computing in Biomedical Device Design



American Society of Mechanical Engineers (ASME), American Society of Thermal and Fluids Engineers (ASTFE)