Dr. Rajendra K. Ray

Dr. Rajendra K. Ray
Phone : 01905-237932
EMail : rajendra[at]iitmandi[dot]ac[dot]in
Address : School of Basic Sciences
IIT Mandi, PWD Rest House 2nd floor,
near Bus Stand, Mandi - 175001
India

Areas of Interest

  • Computational Fluid dynamics (CFD).
  • Numerical Methods for PDEs.
  • Two-Phase Modeling and Sediment Transport.
  • Stochastic Differential-Algebraic Equations.

Education

  • PhD in Mathematics from Indian Institute of Technology Guwahati, 2009.
    Thesis title: Some New Directions in HOC Methodology: Tackling Circular Geometries (Advisor: Dr. Jiten C. Kalita)
  • MSc in Mathematics from Visva-Bharati University, Shantiniketan, 2003
  • BSc in Mathematics (Honours) from Visva-Bharati University, Shantiniketan, 2001

Post-doctoral Research Experience

  • January, 2010–December, 2010 – Laboratoire d’Hydraulique Saint-Venant, University Paris-Est, France (with Prof. Kim Dan NGUYEN).
  • April, 2009 – December, 2009 –Supercomputer Education and Research Centre (SERC), Indian Institute of Science Bangalore, India (with Dr. Soumyendu Raha)

Publications

  • Ray RK. A Transformation-free HOC Scheme for Incompressible viscous Flow Past a Rotating and Translating Circular Cylinder. Journal of Scientific Computing, 2010; DOI: 10.1007/s10915-010-9401-2.
  • Ray RK, Kalita JC. A transformation-free HOC scheme for incompressible viscous flows on nonuniform polar grids. International Journal for Numerical Methods in Fluids, 2010; 62: 683–708.
  • Kalita JC, Ray RK. A transformation-free HOC scheme for incompressible viscous flow past an impulsively started circular cylinder. Journal of Computational Physics, 2009; 228: 5207–5236.
  • Ray RK, Nguyen KD. An Unstructured Finite-volume Technique for Shallow-water Flows with Wetting and Drying Fronts. World Academy of Science, Engineering and Technology, 2010; 71: 682–687.
  • Ray RK, Kalita JC, Dass AK. An efficient HOC scheme for transient convection-diffusion-reaction equations with discontinuous coefficients and singular source terms. Proc. Appl. Math. Mech., 2007; 7(1): 1025603–1025604.
  • Ray RK, Kalita JC. Higher-Order-Compact simulation of unsteady flow past a rotating cylinder at Reynolds numbers 500 and 1000. under review .
  • Ray RK, Kalita JC. An efficient HOC scheme for Parabolic Equations with Discontinuities. Under review .
  • Shi Yu-e, Ray RK, Nguyen KD. Projection method-based model with the exact C-property for shallow-water flows over dry and irregular bottom using unstructured finite-volume technique. Under review .
  • Ray RK, Kalita JC. An efficient HOC scheme for 2D elliptic equations with discontinuities along circular interfaces. Under preparation.
  • Ray RK. A comprehensive study on α - β - phenomena for the flows past an impulsively started circular cylinder. Under preparation.

Journal Referee

  • International journal for Numerical Methods in Fluids.
  • Journal of Computational Physics

Work Experience

Tutor

  • MA102: Multivariable Calculus, Numerical Analysis and Differential Equations.
  • MA201: Complex variable and Partial Differential Equations.

Teaching Assistant

  • MA101: Real Analysis, Differential Calculus and Integral Calculus.
  • MA573: Numerics of Partial Differential Equation.
  • MA201: Complex variable and Partial Differential Equations.

Lab Assistant

  • MA582: Numerical Analysis Lab.
  • MA583: Numerics of PDE Lab.

Conferences/Workshop Attended

  • International Conference on Fluid and Thermal Energy (ICFTE-2010), November 24-26, 2010, Venice, Italy (Contributed talk).
  • National Seminar on Advances in Non-Linear Systems (ANLS-2009), February 21-23, 2009, Visva-Bharati University, India (Contributed talk).
  • Workshop on Image and Signal Processing (WISP-2007), December 28-29,2007, Indian Institute Of Technology, Guwahati, India.
  • Indo-Australian Workshop on ”CFD Approach on Fluid Flow, Heat and Mass Transfer” and Symposium on ”CFD Applications in Multidisciplinary Areas” (IAWS-CFD 2007), IIT Roorkee, India, April 2-14, 2007 (Contributed talk).
  • Training Programme on Theoretical and Numerical Aspects of Ordinary Differential Equations (TPODE-05), December 15 - 24, 2005. Indian Institute of Technology, Guwahati, India.
  • Workshop on Wave Dynamics and Stability of Thin Film Flow System (WDSTFFS-06), September 1-4,2006, Indian Institute Of Technology, Madras, India.

Awards and Scholarships

  • Achieved First class 2nd position in M.Sc. (in Mathematics).
  • Achieved First class 2nd position in B.Sc. (in Mathematics).
  • 96.19 percentile (57th all India rank) in GATE 2004 (in Mathematical Sciences).
  • National Merit Scholarship for 10+2 Examination.
  • National Merit Scholarship for B.Sc. (in Mathematics) Examination.
  • University Merit Scholarship Visva-Bharati University, India (1998, 2000–2003).

Professional Experience

  • Student Representative, Departmental Postgraduate Programme Committee (DPPC), Department of Mathematics, Indian Institute of Technology Guwahati, India, (2005–2008).
  • Member, American Mathematical Society (AMS).
  • Member, Society for Industrial and Applied Mathematics (SIAM).
  • Cultural Secretary, Siang Hostel, Indian Institute of Technology Guwahati, India (2006-2007).
  • Member, Mess Management Committee, Siang Hostel, Indian Institute of Technology Guwahati, India(2004-2005).
  • StudentWarden, Shantishree Boys’ Hostel, Visva-Bharati University, India (2002–2003).
  • Mess Convenor, Nanda Sadan Boys’ Hostel, Visva-Bharati University, India (2000–2001).
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