TY - GEN
T1 - Receptivity of high-speed boundary layers in binary mixture of gases to kinetic fluctuations
AU - Luna, Kevin
AU - Tumin, Anatoli
N1 - Funding Information:
This work was supported by AFOSR Grant FA9550-15-1-0369 monitored by Dr. Ivett Leyva. The views and conclusions contained herein are those of the author and should not be interpreted as necessarily representing the official polices or endorsements, either expressed or implied, of the Air Force Office of Scientific Research or the U. S. Government.
Publisher Copyright:
© 2019 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
PY - 2019
Y1 - 2019
N2 - The receptivity of high-speed boundary layers in a binary mixture of gases (oxygen and nitrogen) to kinetic fluctuations (KF) is considered within the framework of fluctuating hydrodynamics. The formulation is based on the idea that KF-induced dissipative fluxes may lead to the generation of unstable modes in the boundary layer. It is assumed that KF manifest themselves in this context through “stochastic forcing” by a random stress tensor, a random heat flux, a random species diffusion, and a random chemical source term. The approach taken here follows that of Fedorov and Tumin (2017), but includes previously unconsidered effects such as fluctuating species diffusion and fluctuating species production. It is found that the boundary layer flow is most susceptible to kinetic fluctuations in the critical layer and that the fluctuations of the shear stress in the streamwise momentum equation are the dominant fluctuations. These results are in agreement with previous results for the case of a one-component perfect gas.
AB - The receptivity of high-speed boundary layers in a binary mixture of gases (oxygen and nitrogen) to kinetic fluctuations (KF) is considered within the framework of fluctuating hydrodynamics. The formulation is based on the idea that KF-induced dissipative fluxes may lead to the generation of unstable modes in the boundary layer. It is assumed that KF manifest themselves in this context through “stochastic forcing” by a random stress tensor, a random heat flux, a random species diffusion, and a random chemical source term. The approach taken here follows that of Fedorov and Tumin (2017), but includes previously unconsidered effects such as fluctuating species diffusion and fluctuating species production. It is found that the boundary layer flow is most susceptible to kinetic fluctuations in the critical layer and that the fluctuations of the shear stress in the streamwise momentum equation are the dominant fluctuations. These results are in agreement with previous results for the case of a one-component perfect gas.
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U2 - 10.2514/6.2019-1382
DO - 10.2514/6.2019-1382
M3 - Conference contribution
SN - 9781624105784
T3 - AIAA Scitech 2019 Forum
BT - AIAA Scitech 2019 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Scitech Forum, 2019
Y2 - 7 January 2019 through 11 January 2019
ER -