SPECIALIZATION : Computational Fluid Dynamics

AWARDS : Alexander von Humboldt Fellow, JRD Tata Fellow(IISc Bangalore, India), Aerospace Engineering Division Medal(I.E.)

PROFESSIONAL EXPERIENCE:
1991 - till date: Faculty Member, Aerospace Engg Dept, IIT Bombay, India
2000 & 2001: Visiting Faculty/Scientist, Mechanics Dept, RWTH Aachen, Germany
2002-2003: Alexander von Humboldt Fellow, Germany

PROFESSIONAL ACTIVITIES:

• Reviewer for several international journals, NPTEL Lectures;
• Examiners for several PhD theses;
• Expert members in selection and review committees of several IITs, IIST Trivandrum, IIEST Shibpur, several Universities, National Laboratories, R&D Establishments.
• Members of advisory scientific organizing committees of international and national conferences.

RESEARCH AREAS:
Development of novel Computational Fluid Dynamics (CFD) algorithms for

• Incompressible flows involving
• Multiphase flows
• Heat transfer
• Compressible flows involving
• Hypersonic flows with real gas effect
• All Mach number formulation
• Multiphase flows
• Deformation of solids and wave propagation in solids
• Fluid-Structure interactions
• Semi-analytic method

SPONSORED RESEARCH PROJECTS UNDERTAKEN AS PRINCIPAL INVESTIGATOR:

• Computations of Flows Through . . Compressor Cascades (AR&DB)(1995- 1999)
• Computation of viscous incompressible flows inside calandria of a Pressurized Heavy Water Reactor (PHWR)(Board of Research in Nuclear Sciences, Department of Atomic Energy, India)(1996-2000)
• Upgradation of Associate CFD Center of Excellence(2004-2009)
• Flow Computations on Unstructured Grids with Improved Accuracy: An Investigation (AR&DB) (2006-2008)
• Steady/Unsteady Low Speed Viscous Flow Computations on Static/Moving Grids (AR&DB) (2009-2011)
• Upgradation of Associate CFD Center of Excellence(2009-2012)
• Development of High Resolution Schemes for Flow Computations on Space Vehicle Configurations using Unstructured Grids (ISRO) (2009-2012)
• Unsteady Incompressible Turbulent Flow Computations on Static/Moving Grids (AR&DB) (2011-2013)
• Shock Instability and Carbuncle Phenomenon in Numerical Computations: Analysis and Cure (AR&DB) (2012-2015)
• Level set method for propagating interfaces (AR&DB) (2015-2017)
• Study of reinitialization techniques used in conservative level set method for accurate computation of multiphase flows (AR&DB) (2019-2020)

RECENT INVITED/ PLENARY TALKS IN CONFERENCES/ WORKSHOPS:

• "Mathematical Models and Numerical Methods for Incompressible Two-Phase Flows", A.S. Gupta Memorial Lecture, 68th Congress International Conference ISTAM, NIT Warangal, India, 7-9 November 2023.
• "Numerical methods for computing two-phase incompressible flows", 23rd Annual CFD Symposium, Bangalore 11-12 August 2022.
• "Artificial Compressibility method for incompressible flow computations", the INS National Workshop on Application of Numerical Heat Transfer to Industrial Problems, 14-18 March 2016 at BARC, Mumbai.
• "Development of Finite Volume Method for compressible flow computations", Conference on Computational PDE during 21-23 December, 2015 at Tata Institute of Fundamental Research - Centre for Applicable Mathematics, Bangalore.
• "Uncertainty in high speed flow computations due to numerical shock instability", International Conference on Mathematical Modelling and Computer Simulation, December 8-10, 2014, IIT Madras.
• "Numerical aspects of conservation laws", Lectures Series in the workshop on "Conservation Laws with Application to Continuum Mechanics", December 2-7, 2014 at Department of Mathematics, Panjab University, Chandigarh (under the auspices of National Centre of Mathematics).
• "Computational challenges in solving hyperbolic conservation laws", International Humboldt Kolleg on Interdisciplinary Science: Catalyst for Sustainable Progress, September 4-6, 2014, IISc Bangalore.
• "Computational challenges in solving hyperbolic conservation laws", International Conference on Recent Advances in Mathematics (ICRAM 2014 ), 20-23 January, 2014, Rashtrasant Tukodoji Maharaj Nagpur University, India.
• "Computational challenges in obtaining higher order non-oscillatory solutions for hyperbolic conservation laws" International Conference on Mathematical Modelling & Computer Simulation with Applications (ICMMCSA) during Dec 31, 2013 - Jan 2, 2014, IIT Kanpur, U.P., INDIA.
• "Numerical Issues with High Speed Flow Computations", Advanced Level Workshop on "Theoretical and Computational Aspects of Nonlinear Waves"(TCANW-2013), 27-31 May 2013, Under the National Program on Differential Equations: Theory, Computation and Application (NPDE-TCA).
• "High Resolution Finite Volume Method for Unstructured Grids Based on Solution Dependent Weighted Least-Squares Gradient", Keynote Address delivered at International Conference on applications of Fluid Engineering (CAFE 2012) 20-22 September 2012 G.L. Bajaj Institute of Technology and Management, Greater Noida-201306, India.
• "Numerical Shock Instability -- An Issue with High Speed Flow Computations", Keynote Address delivered at International Conference on Applications of Fluid Engineering (CAFE 2012) 20-22 September 2012 G.L. Bajaj Institute of Technology and Management, Greater Noida-201306, India.
• "High Resolution Finite Volume Method for Unstructured Grids Based on Solution Dependent Weighted Least-Squares Gradient", 14-th Annual CFD Symposium, I.I.Sc. Bangalore August 10-11, 2012.
• "Development of CFD Algorithm - An Overview", One Day ARDB Workshop on ”Overview of Aerodynamics Research and the Current Status in India” on the 16th May, 2012, Indian Institute of Technology Bombay, Mumbai.
• "Numerical Shock Instabilities in High-Speed Flows", Invited talk at 5th Symposium On Novel Ideas In CFD (SONIC 2012), 25 January 2012, International Institute of Information Technology, Pune.
• "Development of Riemann Solver for Incompressible Flow Computations and Its Applications", Invited Talk, International Conference on Mathematical Modelling and Applications to Industrial Problems (MMIP 2011), March 28-31, Mathematics Department, National Institute of Technology Calicut, Kerala, India 2011.
• "A Novel Upwind Method for Incompressible Flow Computations using Pseudo-Compressibility approach", Plenary Talk, Third International Congress on Computational Mechanics and Simulation (ICCMS-09), 1-5 December 2009, Indian Institute of Technology Bombay, Mumbai, India.
• "Numerical Computations of Hyperbolic Partial Differential Equations: Issues and Challenges", Plenary Talk at National Symposium on Recent Advances in Computational Techniques (RACT09), January 9-10, 2009, Department of Mathematics, Stella Maris College, Chennai.
• "Development of High-Resolution Schemes for Hyperbolic PDEs" at the International Conference on Computational Partial Differential Equations, 10-13 December 2008, Mathematics Department, IIT Bombay.
• "Fundamentals of Upwind Methods for Hyperbolic Conservation Laws" at the Instructional School on PDEs and National Symposium on Hyperbolic PDEs, 14-17 July 2008, Mathematics Department, IIT Bombay.
• "A Novel Approach for High Resolution Finite Volume Method", Asian Computational Fluid Dynamics Conference, 26-30 Nov 2007, Bangalore, India.
• "Challenges in Developing Higher Order Accurate Schemes for Simulation of Flows with Discontinuities: Issues and Alternatives", Second International Conference on Computational Mechanics and Simulation (ICCMS), IIT Guwahati, India, 8-10 December 2006.
• "Overview of Computations of Incompressible and Low Speed Flows", 16th February 2006, Aerodynamics R&D Division, Vikram Sarabhai Space Centre, Thiruvananthapuram, Kerala.

SELECTED JOURNAL PUBLICATIONS :

• "A low diffusion flux-split scheme for all Mach number flows" (with A Gogoi), Physics of Fluid, 2024 (link to journal)
• "A simple HLLE-type scheme for all Mach number flows" (with A Gogoi), Europian Journal of Mechanics / B Fluids, 2023 (link to journal)
• "A Conservative Finite Volume Method for Incompressible Two-Phase Flows on Unstructured Meshes" (with Sanal Parameswaran), Numerical Heat Transfer, Part B: Fundamentals, 2023. (link to journal)
• "A stable interface-preserving reinitialization equation for conservative level set method" (with Sanal Parameswaran), Europian Journal of Mechanics / B Fluids, Vol 98, pp. 40-63, 2023. (link to journal)
• "An improved HLLC-type solver for incompressible two-phase fluid flows" (with Sourabh P Bhat), Compuers and Fluids, Volume 244, August 2022. (link to journal)
• "A novel Roe solver for incompressible two-phase flow problems", (with Sanal Parameswaran), Journal of Computational Physics, Vol 390, 405-424, 2019. (Link to journal)
• "Strategies to cure numerical shock instability in the HLLEM Riemann solver", (with Sangeeth Simon), International Journal for Numerical Methods in Fluids, Vol 89, Issue 12, 533-569, 2019. (Link to journal).
• "Contact preserving Riemann solver for incompressible two-phase flows", (with Sourabh Bhat), Journal of Computational Physics, Vol. 379, 173-191, 2019. (Link to journal).
• "A simple cure for numerical shock instability in the HLLC Riemann solver", (with Sangeeth Simon), Journal of Computational Physics, Volume 378, 1 February 2019, Pages 477-496. (Link to journal).
• "A cure for numerical shock instability in HLLC Riemann solver using antidiffusive control", (with Sangeeth Simon), Computers and Fluids, Volume 174, 30 September 2018, Pages 144-166. (Link to journal).
• "High resolution incompressible flow computations over unstructured mesh using SDWLS gradients", (with CR Sonawane, Sundeep Rao) Journal of The Institution of Engineers (India): Series C. pp. 1-14, 2017.
• "Convective-pressure flux split algorithm for incompressible flow computation using artificial compressibility formulation" (with Kalamkar SR), International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 26 Issue 2, pp.384-408, 2016 (Link to journal).
• "A genuinely multidimensional convective pressure flux split Riemann solver for Euler equations" (with Vinay Sharma), Journal for Computational Physics, vol.297, pp.669-688, 2015. (Link to journal).
• "High resolution Schemes for Genuinely Two-dimensional HLLE Riemann Solver" (with N. Arvind), Progress in Computational Fluid Dynamics, An International Journal, vol.14, no.4, pp.205-220, 2014.(Link to journal)
• "Simulation of Moderator Flow and Temperature Inside Calandria of CANDU Reactor using Artificial Compressibility Method" (with C. R. Sonawane), Heat Transfer Engineering, vol. 35, issue 11-12, 2014. (Link to journal)
• "Simulation of Flow Inside Differentially Heated Rotating Cavity" (with C. R. Sonawane), International Journal of Numerical Methods for Heat and Fluid Flow, vol.23, issue 1, 2013. (Link to journal)
• "Robust HLL-type Riemann Solver Capable of Resolving Contact Discontinuity" (with Panwar, V), Computers and Fluids, vol.63 (2012) pp.148-164 (Link to journal)
• "Incompressible flow computations over moving boundary using a novel upwind method", (with Sonawane, C R, Iyer, A and GosaviInamdar J A), Computers and Fluids, Volume 46, Issue 1, 2011, 348-352. (Link to journal).
• "An Upwind Method for Incompressible Flows With Heat Transfer", (with Iyer, A) International Journal of Numerical Methods for Heat and Fluid Flow, Volume 21, Issue 5, pp. 518 - 534, 2011 . (Link to journal).
• "High Resolution Finite Volume Computations on Unstructured Grids using Solution Dependent Weighted Least Squares Gradients" (with S. Rao) Computers and Fluids, Volume 44, Issue 1, May 2011, Pages 23-31 (Link to journal).
• "Thermal Hydraulic Characteristics of Air-Water Two-phase flows in Helical Pipes", (with Jayakumar, J. S., Mahajani, S. M., Kannan N Iyer and Vijayan, P. K.), Chemical Engineering Research and Design, 88 (4), pp. 501-512, 2010 (Link to journal).
• "CFD analysis of single-phase flows inside helically coiled tubes", (with Jayakumar, J. S., Mahajani, S. M., Kannan N Iyer and Vijayan, P. K.), Computers and Chemical Engineering, vol.34, pp.430-446, 2010 (Link to journal).
• "On the Link Between Weighted Least-Squares and Limiters Used in Higher-Order Reconstructions for Finite Volume Computations of Hyperbolic Equations", (with Subramanian J), Applied Numerical Mathematics, 58 (5), pp. 705-725, 2008 (Link to journal).
• "High Resolution Finite Volume Computations Using A Novel Weighted Least-Squares Formulation" (with S Rao and J Subramanian) International Journal of Numerical Methods in Fluids, Vol.56, n.8, pp.1425-1431, 2008 (Link to journal).
• "Experimental and CFD Estimation of Heat Transfer in Helically Coiled Heat Exchangers" (with Jayakumar,J.S., Mahajani, Vijayan,P.K. and Bhoi,R.), Chemical Engineering Research and Design, Vol.86, pp. 221-232, 2008 (Link to journal).
• "Energy Relaxation Method for Chemical Non-equilibrium Flow Computations" (with Patil M, Swaminathan S), International Journal of Numerical Methods in Fluids, Vol.54, n.12, pp.1473-1494, 2007 (Link to journal).
• "Unsteady Flow Computations over Moving Body using Dynamic Meshes", (with Ballmann J), International Journal of Computational Methods, Vol.1, No.3, pp.507-518, 2004 (Link to journal).
• "Three Dimensional Hypersonic Flow Computation Over Reentry Capsule Using Energy Relaxation Method", (with Patil M, Swaminathan S), Volume 41, Number 4, pp.695-698, Journal of Spacecraft and Rockets 2004 (Abstract).
• "Numerical Diffusion and Accuracies of Flux Splitting Methods for N-S Equations", Journal of Aeronautical Society of India, Vol.53, No.4, pp.206-210, 2001.
• "Computations of Laminar and Turbulent Mixed Convection in A Driven cavity Using Pseudo Compressibility Approach", (with Agrawal L, Marathe A G), Computers and Fluids, v.30(5), pp.607-620, 2001 (Link to journal).
• "Euler Computations of Cascade Flows using Unstructured Grids" (with S Mohan), Journal of Aeronautical Society of India, Vol.53, No.3, pp.192-199, 2001.
• "Computation of Incompressible Flows With Natural Convection Using Pseudo-Compressibility Approach" (with Lokesh Agrawal), AIAA Journal of Thermophysics and Heat Transfer, Vol.14, No.4, pp.606-609, 2000. (Link to journal)
• "An Improved Multigrid Method for Euler Equations", (with H Rajput) Computational Mechanics, vol.23, no.5/6, pp.397-403, 1999 (Link to journal).
• "Multigrid Transfer Operators for Finite Volume Approach" (with H Rajput), Journal of The Institutation of Engineers (India), Vol.97, pp.1-4, 1998.
• "Structure and Stability of Detonation Waves in a One-Dimensional Model Equations" (with Babu DG, Ananthkrishnan A), Journal of The Institution of Engineers (India), Vol.87, pp.45-48, 1998.
• "Numerical Solution of Hyperbolic Conservation Laws with Source Terms for Flow Through Porous Tube" (with Babu DG, Ananthkrishnan), Journal of The Institution of Engineers (India), Vol.77, pp.8-12, 1996.
• "Kinetic Flux Vector Splitting for Euler Equations", (with Deshpande S M), Computers and Fluids, vol.,No., pp., 1994(Link to journal).
• "Kinetic Theory Based New Upwind Method for Inviscid Compressible Flows" (with S M Deshpande), Journal of Theoretical and Applied Mechanics, No.3, pp.32-38, 1988.