PraVaHa

GS Paper III Science and Technology

Recently, the Indian Space Research Organisation (ISRO) has developed Computational Fluid Dynamics (CFD) software named (PraVaHa).

A Tool for Prediction: CFD is a tool to predict the aerodynamic and aerothermal loads which solve numerically the equations of conservation of mass, momentum, and energy along with the equation of state.

PraVaHa

About PraVaHa

PraVaHa stands for ‘Parallel RANS Solver for Aerospace Vehicle Aero-thermo-dynamic Analysis’.
Function:
- Simulate Flows: It can simulate external and internal flows on launch vehicles, winged and non winged re-entry vehicles.

Implications:
- Gaganyaan Programme: PraVaHa has been used extensively in the Gaganyaan program for aerodynamic analysis of human-rated launch vehicles, viz, HLVM3, Crew Escape System (CES), and CM.
- Scramjet Vehicles: Validations of the code are underway for simulating the effect of chemical reactions that occur during air dissociation upon ‘earth re-entry’ and ‘combustion’ as in scramjet vehicles.
Significance:
- Replacement of CFD Simulations: PraVaHa is expected to replace most of the CFD simulations for aero characterisation, which is currently being carried out using commercial software.
- Solutions to Complex Aerodynamic Problems: This software is expected to help academia and other institutions, engaged in the design of missiles, aircraft and rockets, to find solutions to complex aerodynamic problems.

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