High Performance Computing

Flow past rotary oscillating cylinder for Re=150

The High Performance Computing Laboratory at the Aerospace Engineering Department of I.I.T. Kanpur - started by Prof. Tapan K Sengupta, has been an active place of research right from its inception in 1990. The emphasis of research is on developing high accuracy computing methods to aid in bridging the gap between theoretical and computational fluid dynamics and heat transfer.

Research Areas of HPCL includes:

Transition & Turbulence

  • Receptivity of shear layer: TS waves and bypass transition
  • Receptivity to localized excitation (acoustic, vortical & entropic sources): Streamwise & Crossflow instability o Vortex-induced instability/ bypass Transition
  • Leading Edge Contamination of Sweptback Wings
  • Jets, Acoustics & Instabilities o Free stream turbulence effects
  • NLF airfoil analysis & design for bypass transition
  • Transitional flow modeling - including FST effects o Receptivity - Supersonic Flows past projectiles/ rockets
  • Instabilities of mixed convection flows
  • Turbulence management

Unsteady Aerodynamics

  • Acceleration/ Deceleration effects
  • Aerodynamics of projectiles
  • Low Reynolds number flight & Micro-Air Vehicle
  • High angle of attack aerodynamics & non-linear dynamics
  • Chaos & POD analysis

Bluff Body Flows

  • Flow dynamics: vortex shedding
  • Robins-Magnus Effect
  • Nonlinear instability and multiple Hopf bifurcation: Dynamical system theoretic approach

Flow control

  • Bluff Body Flow Control by rotary oscillation
  • Suppression of vortex shedding by control cylinder in near-wake
  • Separation/ Transition control by plasma actuation for flow over airfoil

Scientific Computing, CFD and Numerical Methods

  • High Performance Parallel Computing
  • High Accuracy FD Methods for DNS/LES/DES via Multi-dimensional Filters & Compact Schemes
  • Over-set\ Chimera Grid Methods for Complex Geometries
  • Time Advancement Strategies & optimized DRP Schemes: Wave Dynamics in CFD, GFD
  • Numerical Instabilities: Signal & Error Propagation Dynamics
  • Spatial Filters for DNS/LES/DES: 1D and multidimensional filters
  • CCD Schemes: New developments for DNS
  • Reduced Order Modeling and POD

Theoretical Fluid Mechanics: Scientific Computing

  • Robins-Magnus Effect: Violation of Prandtl’s limit o Nonlinear Stability Theory: DNS & POD Application
  • Polygonal Vortices: Lid-Driven Cavity Problem
  • Universal Instability Modes: New Insight through DNS/POD for internal and External Flows
  • Bromwich Contour Integrals: Spatio-Temporal Growing Wave-Front Revealed
  • Receptivity at Low Frequencies: Klebanoff Modes Revealed
  • Bypass Transition & q waves: Role of upwind Filters

Group Website: http://spectral.iitk.ac.in/hpcl/