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Subrata Roy (Scientist) (born 1962) is an India-born American inventor, educator, and scientist notable for contributions to plasma-based flow control and plasma-based self-sterilizing technology. Currently, he is a professor of Mechanical and Aerospace Engineering at the University of Florida, the founding director of the Applied Physics Research Group at the University of Florida, and the founder and President of SurfPlasma, Inc.

Biography
Subrata Roy was born in 1962 in Kolkata, India. He went to Jagadbandhu Institution, St. Xavier's College, Kolkata, and received his bachelor’s degree in mechanical engineering from Jadavpur University in 1984. After working in the Indian industry for four years, Roy came to the United States of America in 1988. He earned his Ph.D. in engineering science from the University of Tennessee in Knoxville, TN in 1994.

Roy was a senior research scientist at Computational Mechanics Corporation in Knoxville, Tennessee, and then professor of mechanical engineering at the Kettering University up to 2006. In 2006, Roy joined the University of Florida as a faculty member of the Department of Mechanical and Aerospace Engineering. He is a professor of Mechanical and Aerospace Engineering and the founding director of the Applied Physics Research Group at the University of Florida. He has also worked as a visiting professor at the University of Manchester, and the Indian Institute of Technology Bombay.

Scientific work
Subrata Roy's research and scientific work encompasses Computational Fluid Dynamics (CFD), plasma physics, heat transfer, magnetohydrodynamics, electric propulsion, and micro/nanoscale flows and is funded by federal agencies like AFOSR, DARPA, NASA, NSF, ONR and industry. In 2003, Roy incorporated Knudsen’s theory that handles surface collisions of molecules by diffusive and specular reflections into hydrodynamic models,  which has been used in shale gas seepage studies. In 2006, a research team lead by Subrata Roy invented the Wingless Electromagnetic Air Vehicle (WEAV) which was included in Scientific American in 2008 as the world's first wingless, electromagnetically-driven air vehicle design. Roy has also introduced various designs and configurations of plasma actuators for thrust generation, flow actuation, and propulsion with applications in mitigation of flow drag related fuel consumption, noise reduction, and active film cooling of turbine blades. These designs and configurations include serpentine geometry plasma actuators, fan geometry plasma actuators, microactuators, multibarrier plasma actuators, and plasma actuated channels of atmospheric plasma actuators. As of April 2020, Roy has over 180 publications in peer-reviewed journals and bound volumes on plasma flow control research and 32 United States patent applications of which 22 international patents have been issued.

Roy served as the Technical Discipline Chair for the 36th AIAA Thermophysics Conference in 2003, the 48th Aerospace Sciences Meeting (for Thermophysics) in 2010, the AIAA SciTech Plasma Dynamics and Lasers Conference in 2016, and served as the Forum Technical Chair for AIAA SciTech in 2018. Roy served (2005–2007) as an Associate Editor of the Journal of Fluids Engineering and served (2012–2017) as an Academic Editor of PLOS One. As of April 2020, Roy is a nation appointed member to the NATO Science and Technology Organisation working group on plasma actuator technologies; a member of the Editorial Board of Nature Scientific Reports; and, an Associate Editor of Journal of Fluid Flow, Heat and Mass Transfer. Roy is a Distinguished Visiting Fellow of the Royal Academy of Engineering, a Fellow of the Royal Aeronautical Society, a lifetime member and Fellow of the American Society of Mechanical Engineers, and an Associated Fellow of the AIAA.

Non-scientific work
Besides his academic activities, Roy is also an author who regularly writes in Bengali. His articles, short stories, and poems are published in literary magazines Desh and Anandamela and dailies like Anandabazar Patrika and Aajkaal. In 1998, his collection of articles was published as ভিন্ন গ্রহে প্রাণের উৎস (Vinna Grahe Praner Utsa) by Ananda Publishers of Kolkata, India.