Biswas has made contributions in the areas of heat transfer and fluid mechanics. His work on enhancement of heat transfer using delta-winglet type vortex generators is a major contribution[4][5] which is included in the advanced international text books.[6] The innovative concept has been used by the Industry for various HAVC systems. Furthermore, he has contributed significantly in understanding the bluff body flows.[7] His work on large-eddy simulation of flow past bluff bodies[8] and heat transfer in impinging jets[9] have been deeply admired by the scientific community. Contributions of Prof. Biswas pertaining to handling free surface flows[10] and some of his investigations related to prediction of bubble growth in film boiling[11][12][13] are considered to be path-breaking. Prof. Biswas and co-researchers analyzed impact of falling drops on a liquid surface[14][15] and made fundamental contributions to the body of knowledge related to partial coalescence and the transition between coalescence and splashing. Experimental evidence of large bubble entrapment occurring outside the traditional small region on the V-D map, made the boundary of large bubble entrapment a topic of greater importance. A seminal contribution of his group probes the zone of large bubble entrapment and underlying physics.[16] He has made significant impact through his publications on formation of air bubbles from a submerged orifice.[17][18] His group analyzed the impact of a train of high-speed microdrops on a deep liquid pool. The work explained mechanistic route leading to creation of a deep cavity inside the liquid pool.[19] Prof. Biswas and the co-researchers contributed in understanding that the EMT cells are more drug resistant with a concomitant two-fold higher expression of the multi-drug resistance (MDR1) gene.[20]
Biswas has received the 2023 ASME Heat Transfer Memorial Award in the Science Category for Sustained and Outstanding Contributions to Thermal Science and Engineering, including Heat Transfer Enhancement, Phase Change Heat Transfer with and without Electrohydrodynamic Forces and Dynamics of Liquid Jet and Droplet Impingement.[24]
^Biswas, G.; Mitra, N. K.; Fiebig, M. (1 January 1994). "Heat transfer enhancement in fin-tube heat exchangers by winglet type vortex generators". International Journal of Heat and Mass Transfer. 37 (2): 283–291. doi:10.1016/0017-9310(94)90099-X.
^Biswas, G.; Torii, K.; Fujii, D.; Nishino, K. (1 November 1996). "Numerical and experimental determination of flow structure and heat transfer effects of longitudinal vortices in a channel flow". International Journal of Heat and Mass Transfer. 39 (16): 3441–3451. doi:10.1016/0017-9310(95)00398-3.
^Saha, A. K; Biswas, G; Muralidhar, K (1 February 2003). "Three-dimensional study of flow past a square cylinder at low Reynolds numbers". International Journal of Heat and Fluid Flow. 24: 54–66. doi:10.1016/S0142-727X(02)00208-4.
^Srinivas, Y.; Biswas, G.; Parihar, A. S.; Ranjan, R. (1 January 2006). "Large-Eddy Simulation of High Reynolds Number Turbulent Flow Past a Square Cylinder". Journal of Engineering Mechanics. 132 (3): 327–335. doi:10.1061/(ASCE)0733-9399(2006)132:3(327).
^Cziesla, T.; Biswas, G.; Chattopadhyay, H.; Mitra, N. K. (1 October 2001). "Large-eddy simulation of flow and heat transfer in an impinging slot jet". International Journal of Heat and Fluid Flow. 22 (5): 500–508. doi:10.1016/S0142-727X(01)00105-9.
^Gerlach, D.; Tomar, G.; Biswas, G.; Durst, F. (1 February 2006). "Comparison of volume-of-fluid methods for surface tension-dominant two-phase flows". International Journal of Heat and Mass Transfer. 49 (3–4): 740–754. doi:10.1016/j.ijheatmasstransfer.2005.07.045.
^Tomar, G.; Biswas, G.; Sharma, A.; Welch, S. W. J. (1 September 2008). "Multimode analysis of bubble growth in saturated film boiling". Physics of Fluids. 20 (9): 092101–092101–7. Bibcode:2008PhFl...20i2101T. doi:10.1063/1.2976764.
^Hens, Abhiram; Biswas, Gautam; De, Sudipta (1 January 2014). "Analysis of interfacial instability and multimode bubble formation in saturated boiling using coupled level set and volume-of-fluid approach". Physics of Fluids. 26 (1): 012105. Bibcode:2014PhFl...26a2105H. doi:10.1063/1.4861760.
^Journal: Physics of Fluids, Volume: 28, Pages: 052102-1- 052102-18, Year: 2016 Pandey, Vinod; Biswas, Gautam; Dalal, Amaresh (2016). "Effect of superheat and electric field on saturated film boiling". Physics of Fluids. 28 (5): 052102. Bibcode:2016PhFl...28e2102P. doi:10.1063/1.4948545. S2CID124898848.
^Journal: Journal of Fluid Mechanics, Volume: 655, Pages: 72-104, Year: 2010 Ray, B.; Biswas, G.; Sharma, A. (2010). "Generation of secondary droplets in coalescence of a drop at a liquid–liquid interface". Journal of Fluid Mechanics. 655: 72–104. Bibcode:2010JFM...655...72R. doi:10.1017/S0022112010000662. S2CID120239071.
^Journal: Journal of Fluid Mechanics, Volume: 768, Pages: 492-523, Year: 2015 Ray, Bahni; Biswas, Gautam; Sharma, Ashutosh (2015). "Regimes during liquid drop impact on a liquid pool". Journal of Fluid Mechanics. 768: 492–523. Bibcode:2015JFM...768..492R. doi:10.1017/jfm.2015.108. S2CID86847921.
^Journal - Physics of Fluids, Volume - 29, Pages 092101-1- 092101-13, Year - 2017 Deka, Hiranya; Ray, Bahni; Biswas, Gautam; Dalal, Amaresh; Tsai, Pei-Hsun; Wang, An-Bang (2017). "The regime of large bubble entrapment during a single drop impact on a liquid pool". Physics of Fluids. 29 (9): 092101. Bibcode:2017PhFl...29i2101D. doi:10.1063/1.4992124.
^Journal: Physics of Fluids, Volume: 21, Pages: 062103-1 – 062103-17, Year: 2009 Chakraborty, I.; Ray, B.; Biswas, G.; Durst, F.; Sharma, A.; Ghoshdastidar, P. S. (2009). "Computational investigation on bubble detachment from submerged orifice in quiescent liquid under normal and reduced gravity". Physics of Fluids. 21 (6): 062103–062103–17. Bibcode:2009PhFl...21f2103C. doi:10.1063/1.3152437.
^Chakraborty, Indrajit; Biswas, Gautam; Polepalle, Satyamurthy; Ghoshdastidar, Partha S. (2015). "Bubble formation and dynamics in a quiescent high-density liquid". AIChE Journal. 61 (11): 3996–4012. doi:10.1002/aic.14896.
^Journal - Physics of Fluids, Volume - 30, Pages 042103-1 – 042103-14, Year - 2018 Deka, Hiranya; Ray, Bahni; Biswas, Gautam; Dalal, Amaresh (2018). "Dynamics of tongue shaped cavity generated during the impact of high-speed microdrops". Physics of Fluids. 30 (4): 042103. Bibcode:2018PhFl...30d2103D. doi:10.1063/1.5022374.