Dr. Sajad Alimohammadi
Adjunct Assistant Professor, Mechanical, Manuf & Biomedical Eng
Biography
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, Tim Persoons, A Novel Linear Air Amplifier Technology to Replace Rotary Fans in Data Center Server Rack Cooling, 26th International Workshop on Thermal Investigations of ICs and Systems (THERMINIC), Berlin, Germany (virtual), 23-25 September 2020, 2020, pp1 - 6
Jaakko McEvoy, Sajad Alimohammadi, Tim Persoons, Experimental investigation of flow pulsation waveforms in rectangular mesochannels for high heat flux electronics cooling, 5th International Conference on Experimental Fluid Mechanics ICEFM 2018 Munich, Munich, Germany, 2018
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, 2018, p1 - 10
Assel Sakanova, Sajad Alimohammadi, Jaakko McEvoy, Tim Persoons, Hybrid-Cooled Data Center Server Layout Optimization for Air-Side Heat Recovery, 2018 24rd International Workshop on Thermal Investigations of ICs and Systems (THERMINIC, Stockholm, Sweden, 2018
Kun Zhao, Sajad Alimohammadi, Patrick N Okolo, John Kennedy, Gareth J Bennett, Aerodynamic noise reduction using dual-jet planar air curtains, Journal of Sound and Vibration, 432, 2018, p192 - 212
Tim Persoons, Rick Cressall, Sajad Alimohammadi, Validating a Reduced-Order Model for Synthetic Jet Actuators Using CFD and Experimental Data, MDPI Acutators, 7, (4), 2018
Sajad Alimohammadi, Jaakko McEvoy, Yan Delauré, Tim Persoons, Benchmarking the Application of Detached Eddy Simulation Techniques in Data Center Server Flow Modelling using Stereoscopic Particle Image Velocimetry, 2018 24rd International Workshop on Thermal Investigations of ICs and Systems (THERMINIC), Stockholm, Sweden, IEEE, 2018
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
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
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
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
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
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
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
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
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-
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-
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-
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
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
Research Expertise
Description
. 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 DesignRecognition
Memberships
American Society of Mechanical Engineers (ASME), American Society of Thermal and Fluids Engineers (ASTFE)