Sreeram Shankar — portfolio profile photo

Sreeram Shankar

Numerical Methods for Differential Equations

Hi, I'm Sreeram! I'm a current high school student incoming to the University of Texas at Austin for Computational Engineering at the Cockrell School of Engineering and the Oden Institute for Computational Engineering and Sciences. My work focuses on numerical methods for differential equations, specifically spatial discretization, time integration, and linear solvers across computational science and engineering domains I was awarded a full Cockrell Engineering Honors Scholarship and intend to advance research in computational mathematics, science, and engineering through the Oden Institute and the ASE/EM Department

Research

Research questions that I've previously and currently exploring, focusing on the interaction and effects of numerical methods in various types and scenarios. My work is currently under Jesse Chan at the University of Texas at Austin's Oden Institute for Computational Engineering and Sciences.

Nonlinear stability analysis of positivity-preserving hyperbolic schemes

Current

Developing a framework for nonlinear fully discrete stability analysis of hyperbolic PDE solvers, motivated by modified Patankar–Runge–Kutta methods that enforce positivity. The work extends classical von Neumann analysis toward state-dependent spectral behavior tracking, with the goal of analyzing how finite volume discretizations and positivity-preserving time integration interact in nonlinear settings.

Spectral behavior of isogeometric analysis in comparison with finite elements

Current

Studying the spectral behavior of isogeometric analysis relative to standard finite element methods, with emphasis on how discretization structure influences eigenvalue distributions and numerical performance. Current and planned directions include extending this comparison into nonlinear structural dynamics to understand how geometric smoothness, basis continuity, and nonlinearity affect the evolving spectrum of IGA versus FEM.

Projects

A collection of scientific and numerical projects that I've worked on, excluding research and contributions, focusing on developing numerical methods and software for solving scientific problems.

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2D Multigrid Cycle Analyzer

A Julia-based numerical laboratory for studying geometric multigrid cycle behavior, smoother performance, residual decay, and FFT-resolved spectral effects in 2D finite-difference Poisson problems.

Multigrid Methods
Spectral Analysis
Numerical Analysis
Numerical Linear Algebra
Iterative Linear Solvers
Julia
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Stochastic Chemical Dynamics Testbed

A controlled numerical framework for SSA, CLE, and solver comparison, built to study how modeling, discretization, and randomness architecture shape stochastic chemical dynamics.

Ordinary Differential Equations
Time Integration
Runge–Kutta Methods
Implicit & IMEX Methods
Computational Physics
Python

Skills and Focus Areas

Focuses and skills across computational mathematics and science that I've worked with or am currently exploring in my research, projects, and contributions

Spectral Analysis

Fully Discrete Analysis

Numerical Analysis

Partial Differential Equations

Ordinary Differential Equations

Spatial Discretization

Finite Element Methods

Discontinuous Galerkin Methods

Finite Volume Methods