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Ramaiah University of Applied Sciences

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Dr. Jayahar Sivasubramanian

Assistant Professor and Head

Dr. Jayahar Sivasubramanian has more than 19 years research experience in theoretical and computational fluid mechanics. He has extensive experience in conducting high-fidelity numerical simulations to investigate complex multi-physics fluid flow problems. He has lead several research efforts towards understanding the receptivity, stability and laminar-to-turbulent transition of hypersonic boundary layer flows, including the effects of chemical and thermal non-equilibrium. His research work has provided unprecedented insights into the flow physics for hypersonic boundary layers. His expertise is in developing advanced computational models and conducting complex fluid flow simulations.

Qualifications

  • B. E.

    University of Madras, Chennai, India

  • M. S.

    University of Arizona, Tucson, Arizona, USA

  • Ph.D.

    University of Arizona, Tucson, Arizona, USA

Experience

Total Experience: 20.23 Years

Research Interest

  • Theoretical and Computational Hypersonic Sciences
  • Laminar to Turbulent Transition 
  • High-Speed Boundary Layer Transition 
  • Shock Boundary Layer Interaction
  • Flow Separation & Separation Control
  • High Performance Computing 
  • High-Order Numerical Methods 
  • Aero-Thermodynamics

  1. P. Kjellgren, A. Hassan, J. Sivasubramanian, L. Cullen, D. Cerchie and I. Wygnanski, ​“Download Alleviation for the XV-15: Computations and Experiments of Flows Around the Wing”, AIAA-2002- 6007, Biennial International Powered Lift Conference and Exhibit, 5 – 7 November, 2002 / Williamsburg, Virginia. 
  2. D.A. von Terzi, R.D. Sandberg, J. Sivasubramanian and H.F. Fasel, ​“High Accuracy DNS and LES of High Reynolds Number, Supersonic Base Flows and Passive Control of the Near Wake”, DoD High Performance Computing Modernization Program, Users Group Conference, 27 – 30 June, 2005 / Nashville, Tennessee. 
  3. J. Sivasubramanian, R.D. Sandberg, D.A. von Terzi and H.F. Fasel, ​“Numerical Investigation of Transitional Supersonic Base Flows with Flow Control”, AIAA-2006 – 0479, 44th AIAA Aerospace Sciences Meeting and Exhibit, 9 – 12 January 2006 / Reno, Nevada. 
  4. J. Sivasubramanian, R.D. Sandberg, D.A. von Terzi and H.F. Fasel, ​“Numerical Investigation of Flow Control Mechanisms for Drag Reduction in Supersonic Base – flows”, AIAA-2006 – 0902, 44th AIAA Aerospace Sciences Meeting and Exhibit, 9 – 12 January 2006 / Reno, Nevada.
  5. J. Sivasubramanian and H.F. Fasel, ​“LES and DES of High Reynolds Number, Supersonic Base Flows with Control of the Near Wake”, DoD High Performance Computing Modernization Program, Users Group Conference, 26 – 29 June, 2006 / Denver, Colorado. 
  6. J. Sivasubramanian, R.D. Sandberg, D.A. von Terzi and H.F. Fasel, ​“Numerical Investigation of Transitional Supersonic Base Flows with Flow Control”, Journal of Spacecraft and Rockets, Vol. 44, No. 5, Page no. 1021 – 1028, 2007 
  7. J. Sivasubramanian and H.F. Fasel, ​“Numerical Investigation of Supersonic Axisymmetric Wakes with Active and Passive Flow Control”, AIAA-2008 – 3999, 4th AIAA Flow Control Conference, 23 – 26 June, 2008 / Seattle, Washington. 
  8. J. Sivasubramanian, C. Mayer, A. Laible and H.F. Fasel, ​“Numerical Investigation of Wavepackets in a Hypersonic Cone Boundary Layer at Mach 6”, AIAA-2009 – 3560, 39th AIAA Fluid Dynamics Conference, 22 – 25 June, 2009 / San Antonio, Texas. 
  9. J. Sivasubramanian and H.F. Fasel, ​“Numerical Investigation of Boundary – Layer Transition Initiated by a Wave Packet for a Cone at Mach 6”, AIAA-2010 – 0900, 48th AIAA Aerospace Sciences Meeting, 4 – 7 January, 2010 / Orlando, Florida. 
  10. J. Sivasubramanian and H.F. Fasel, ​“Direct Numerical Simulation of a Turbulent Spot in a Cone Boundary – Layer at Mach 6”, AIAA-2010 – 4599, 40th AIAA Fluid Dynamics Conference and Exhibit, 28 June – 1 July, 2010 / Chicago, Illinois.
  11. J. Sivasubramanian and H.F. Fasel, ​“Transition Initiated by a Localized Disturbance in a Hypersonic Flat – Plate Boundary Layer”, AIAA-2011 – 0374, 49th AIAA Aerospace Sciences Meeting, 4 – 7 January, 2011 / Orlando, Florida. 
  12. J. Sivasubramanian, A. Laible and H.F. Fasel, ​“Numerical Simulation of Transition in Hypersonic Boundary Layers”, DoD High Performance Computing Modernization Program, Users Group Conference, 20 – 23 June, 2011 / Portland, Oregon. 
  13. J. Sivasubramanian and H.F. Fasel, ​“Numerical Investigation of Laminar – Turbulent Transition in a Cone Boundary Layer at Mach 6”, AIAA-2011 – 3562, 41st AIAA Fluid Dynamics Conference and Exhibit, 27 – 30 June, 2011 / Honolulu, Hawaii. 
  14. J. Sivasubramanian and H.F. Fasel, ​“Growth and Breakdown of a Wave Packet into a Turbulent Spot in a Cone Boundary Layer at Mach 6”, AIAA-2012 – 0085, 50th AIAA Aerospace Sciences Meeting, 9 – 12 January, 2012 / Nashville, Tennessee. 
  15. J. Sivasubramanian and H.F. Fasel, ​“Nonlinear Stages of Transition and Breakdown in a Boundary Layer on a Sharp Cone at Mach 6”, AIAA-2012 – 0087, 50th AIAA Aerospace Sciences Meeting, 9 – 12 January, 2012 / Nashville, Tennessee. 
  16. J. Sivasubramanian and H.F. Fasel, ​“Direct Numerical Simulation of Transition in a Hypersonic Cone Boundary Layer”, High Performance Computing Modernization Program contributions to DoD Mission Success, September, 2012. 
  17. J. Sivasubramanian and H.F. Fasel, ​“Direct Numerical Simulation of Controlled Transition in a Boundary Layer on a Sharp Cone at Mach 6”, AIAA-2013 – 0263, 51st AIAA Aerospace Sciences Meeting, 7 – 10 January, 2013 / Grapevine, Texas. 
  18. J. Sivasubramanian, C. Hader and H.F. Fasel, ​“Numerical Investigation of Transition in Hypersonic Boundary Layers”, High Performance Computing Modernization Program contributions to DoD Mission Success, June, 2013. 
  19. H.F. Fasel, J. Sivasubramanian and A. Laible, ​“Numerical Investigation of Transition in a Flared Cone Boundary Layer at Mach 6”, IUTAM-ABCM Symposium on Laminar – Turbulent Transition, 8 – 12 September, 2014 / Rio De Janeiro, Brazil. 
  20. J. Sivasubramanian and H.F. Fasel, ​“Numerical Investigation of the Development of Three – dimensional Wave Packets in a Sharp Cone Boundary Layer at Mach 6”, Journal of Fluid Mechanics, Vol. 756, Page no. 600 – 649, 2014. 
  21. J. Sivasubramanian and H.F. Fasel, ​“Numerical Investigation of Shock – Induced Laminar Separation Bubble in a Mach 2 Boundary Layer”, AIAA-2015 – 2641, 45th AIAA Fluid Dynamics Conference, 22 – 26 June, 2015 / Dallas, Texas. 
  22. J. Sivasubramanian and H.F. Fasel, ​“Numerical Investigation of Shock – wave Boundary Layer Interactions in Supersonic Flows”, AIAA-2016 – 0613, 54th AIAA Aerospace Sciences Meeting, 4 – 8 January, 2016 / San Diego, CA. 
  23. J. Sivasubramanian and H.F. Fasel, ​“Direct Numerical Simulation of Laminar – Turbulent Transition in a Flared Cone Boundary Layer at Mach 6”, AIAA-2016 – 0846, 54th AIAA Aerospace Sciences Meeting, 4 – 8 January, 2016 / San Diego, CA. 
  24. J. Sivasubramanian and H.F. Fasel, ​“Direct Numerical Simulation of Transition in a Sharp Cone Boundary Layer at Mach 6: Fundamental Breakdown”, Journal of Fluid Mechanics, Vol. 768, Page no. 175 – 218, 2016. 
  25. J. Sivasubramanian, A. Tumin and H.F. Fasel, ​“The Reynolds Number Effect on Receptivity to a Localized Disturbance in a Hypersonic Boundary Layer”, AIAA-2018 – 4246, 46th AIAA Fluid Dynamics Conference, 13 – 17 June, 2018 / Washington, D.C.
  26. A. Prathap, R. M. Chitgopekar, S. K. Ullal, R. G. Mahenderkar, D. K. Punjabi, J. Sivasubramanian, ​“Numerical Simulation of Hypersonic Flow Over Orion CEV Re-entry Vehicle using SU2”, ICFTES2022 – FF – 132, 1st International Conference in Fluid Thermal and Energy Systems, 9 – 11 June 2022 / NIT Calicut, Kerala, India.
  27. P. K. Goyal and J. Sivasubramanian, ​“Numerical Study on the Aerodynamic Characteristics of Supersonic and Hypersonic Missiles”, ICFTES2022 – FF – 140, 1st International Conference in Fluid Thermal and Energy Systems, 9 – 11 June 2022 / NIT Calicut, Kerala, India.
  28. A. Prathap, S. K. Ullal and J. Sivasubramanian, ​“Simulations of High Speed Flows Using SU2”, Proceedings of 23rd Annual CFD Symposium, CFD Division (AeSI) and ADA, August 11 – 12, 2022 / Bengaluru, India. 
  29. P. K. Goyal and J. Sivasubramanian, ​“Aerodynamic Analysis and Optimization of a Hypersonic Missile”, Proceedings of the 9th International and 49th National Conference on Fluid Mechanics and Fluid Power, 14 – 16 December 2022 / IIT Roorkee, Uttarakhand, India. 
  30. D. S. Deora, V. Vishesh, S. S. Goudar and J. Sivasubramanian, ​“Numerical Investigation of High-Speed Flows Over the HIFiRE‑1 and Orion CEV”, AIAA SCITECH 2023, AIAA-2023 – 1611, 23 – 27 January 2023 / National Harbor, MD
  31. P. K. Goyal, B. Prasad and J. Sivasubramanian, ​“Aerodynamic Shape Optimization of a Hypersonic Missile Geometry”, 25th AIAA International Planes and Hypersonic Systems and Technologies Conference, AIAA-2023 – 3022, 28 May – 1 June 2023 / IISc Bangalore, India. 
  32. J. Sivasubramanian, ​“Linear Stability Analysis of a Hypersonic Boundary Layer on a Flat Plate”, 25th AIAA International Planes and Hypersonic Systems and Technologies Conference, AIAA-2023 – 3022, 28 May – 1 June 2023 / IISc Bangalore, India.
  33. V. Vishesh and J. Sivasubramanian, ​“Prediction of Heat Transfer and Skin Friction for the HIFiRE‑1 Flight Research Vehicle”, 25th AIAA International Planes and Hypersonic Systems and Technologies Conference, AIAA-2023 – 3022, 28 May – 1 June 2023 / IISc Bangalore, India. 
  34. S. S. Goudar and J. Sivasubramanian, ​“Effect of Nose Bluntness on the Stability of Hypersonic Boundary Layers on Circular Cones”, 14th Asian Computational Fluid Dynamics Conference (ACFD 2023), 30th Oct. — 2nd Nov. 2023, Bengaluru, India.
  35. V. Vishesh, M. Zaid and J. Sivasubramanian, ​“Numerical Study of Unstart/​Restart related Hysteresis in Scramjet Engines”, 14th Asian Computational Fluid Dynamics Conference (ACFD 2023), 30th Oct. — 2nd Nov. 2023, Bengaluru, India.
  36. V. Vishesh and J. Sivasubramanian, ​“Prediction of Heat Transfer for the HIFiRE‑1 Hypersonic Flight Research Vehicle”, 14th Asian Computational Fluid Dynamics Conference (ACFD 2023), 30th Oct. — 2nd Nov. 2023, Bengaluru, India.

  • Best Paper Award, ICFTES, NIT, Calicut, India, 2022
  • Post-doctoral Research Fellowship, University of Arizona, Tucson, AZ, 2012 – 2014
  • Hypersonic transition research highlighted in Annual Review of Fluid Mechanics by Xiaolin Zhong and Xiaowen Wang, Vol. 44, Page no. 527 – 561, 2012
  • Travel Grant Award, Division of Fluid Dynamics, American Physical Society, 2009
  • Badenwurtemburg Scholarship, German Academic Exchange Service (DAAD), University of Stuttgart, Germany, 2007
  • Graduate College Fellowship, University of Arizona, Tucson, AZ, 2006
  • Graduate Registration Scholarship, University of Arizona, Tucson, AZ, 2004 – 2008
  • Graduate Tuition Scholarship, University of Arizona, Tucson, AZ, 2001 – 2002
  • Distinction in Bachelor Degree, University of Madras, Chennai, India, 2000
  • State First Rank in Mathematics, Higher Secondary Course, Tamil Nadu, India, 1996

  • American Institute of Aeronautics and Astronautics (AIAA)

    Member

  • American Physical Society (APS)

    Member