Linear stability of high-speed boundary layer flows at varying Prandtl numbers

Ashwin Ramachandran, Bijaylakshmi Saikia, Krishnendu Sinha, Rama Govindarajan
  • June 2015, American Institute of Aeronautics and Astronautics (AIAA)
  • DOI: 10.2514/6.2015-2320

Prandtl number and high-speed boundary layer

What is it about?

Prandtl number in a high speed flow varies as a function of temperature, pressure and composition of the gas. We study how this variation in Prandtl number can effect the stability of high Mach number flows.

Why is it important?

We find that for a high Mach number boundary layer flow, increasing the momentum diffusivity compared to thermal diffusivity can significantly destabilize the flow.

Perspectives

bijaylakshmi saikia (Author)
Indian Institute of Technology Bombay

This work shows that the effect of Prandtl number on laminar to turbulent flow transition can be completely different in a boundary layer flow compared to a wall-bounded flow.

The following have contributed to this page: bijaylakshmi saikia, Ashwin Ramachandran, and Prof Rama Govindarajan