PEOPLE Faculty
International Centre for Theoretical Sciences, Bengaluru
Area of Research:  Partial Differential Equations, Nonlinear waves and Fluid Mechanics
  +91 80 4653 6350    
H-306
  vishalvasan  ictsresin

Academic Profile

  • Reader, ICTS TIFR 2015-Present
  • S. Chowla Research Assistant Professor, Pennsylvania State University 2012-2015
  • PhD, Applied Mathematics, University of Washington 2012
  • MS, Mechanical Engineering, Arizona State University 2007
  • BE, Mechanical Engineering, Anna University 2005

 Curriculum vitae

 Google Scholar page

Research Interests

My main interest is in partial differential equations, their applications and methods of constructing solutions (both analytical and numerical). Most of my work has come with a very applied motivation to solve concrete problems in engineering or geophysics. The actual work can range from asymptotics for PDEs, scientific computing or hard/soft analysis to obtain estimates. Often it is a healthy mix of them all. 

I work on applications ranging from water waves to Bose-Einstein condensates and nonlinear optics. Most recently I've gotten interested in some problems of atmospheric science. I am also part of the ICTS monsoon dynamics group devoted to understanding the mathematics of the Indian monsoon. We look at the problem from a range of perspectives including multi-scale dynamical models, probabilistic models of meteorological data and the motion of cloud particles.

And I have a small fluids lab where I study pattern formation and conduct table-top fluid flow experiments.

List of publications

Notes

A very wise man once said to write down what you've done. And make it available. To that end, here are a (hopefully) growing list of notes that may or may not be useful to someone. 

  • Nonlinear systems of ordinary differential equations A very quick introduction to nonlinear ODEs (only two dimensional) covering the very basics of equilibrium points, jacobians and associated stability. These notes are written for undergraduate students with little-to-no-background in linear algebra and some knowledge of calculus. The notes do NOT contain any proofs as they were intended for engineering students taking a course on differential equations. These were written when I was a graduate student, so excuse the informal nature.
  • Introduction to perturbation methods [Updated: 14 May 2019] In May 2019, I gave four lectures introducing perturbation methods for nonlinear partial differential equations. These lectures cover a subset topics from the notes. Lecture 1 Lecture 2 Lecture 3 Lecture4 I gave a related lecture on the derivation of the quasi-geostrophic equations using the same ideas as part of a discussion meeting on Air-Sea interaction in the Bay of Bengal Quasi-geostrophic equations