TY - GEN
T1 - Subgrid scale modeling of the equation of state for turbulent flows under supercritical conditions
AU - Unnikrishnan, Umesh
AU - Wang, Xingjian
AU - Yang, Suo
AU - Yang, Vigor
N1 - Funding Information:
This work was funded by the William R.T. Oakes Endowment of the Georgia Institute of Technology.
PY - 2017
Y1 - 2017
N2 - The focus of this work is to develop subgrid models for the filtered equation of state for large eddy simulation (LES) of supercritical mixing. The conventional LES treatment of directly computing the filtered density in terms of other filtered quantities results in significant modeling errors. To alleviate this problem, two different approaches are investigated - the gradient-based approach, which seeks to establish a model based on the correlation between the subgrid term and the property gradients in the flow field, and the mixing-based approach, which models the subgrid term as a beta function of the mixture fraction and scalar dissipation rate. Reduction in modeling errors by up to 40% is achieved with the models developed and new insights into the physics of these subgrid contributions are gained.
AB - The focus of this work is to develop subgrid models for the filtered equation of state for large eddy simulation (LES) of supercritical mixing. The conventional LES treatment of directly computing the filtered density in terms of other filtered quantities results in significant modeling errors. To alleviate this problem, two different approaches are investigated - the gradient-based approach, which seeks to establish a model based on the correlation between the subgrid term and the property gradients in the flow field, and the mixing-based approach, which models the subgrid term as a beta function of the mixture fraction and scalar dissipation rate. Reduction in modeling errors by up to 40% is achieved with the models developed and new insights into the physics of these subgrid contributions are gained.
UR - http://www.scopus.com/inward/record.url?scp=85044461416&partnerID=8YFLogxK
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U2 - 10.2514/6.2017-4855
DO - 10.2514/6.2017-4855
M3 - Conference contribution
AN - SCOPUS:85044461416
SN - 9781624105111
T3 - 53rd AIAA/SAE/ASEE Joint Propulsion Conference, 2017
BT - 53rd AIAA/SAE/ASEE Joint Propulsion Conference, 2017
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - 53rd AIAA/SAE/ASEE Joint Propulsion Conference, 2017
Y2 - 10 July 2017 through 12 July 2017
ER -