New temperature jump boundary condition in high-speed rarefied gas flow simulations


  • Nam Tuan Phuong Le Ton Duc Thang University
  • Ngoc Anh Vu Ho Chi Minh City University of Technology, VNU-HCM
  • Le Tan Loc Vietnam Aviation Academy, Ho Chi Minh City
  • Tran Ngoc Thoai Industrial University of Ho Chi Minh City



Sliding friction, new temperature jump condition, NACA0012 airfoil


The effect of the sliding friction has been important in calculating the heat flux of gas flow from the surface since there is some slip over the surface. There has not been any the temperature jump condition including the sliding friction part so far. In this paper, we will propose a new temperature jump condition that includes the sliding friction. Our new temperature jump condition will be evaluated for NACA0012 micro-airfoil in high-speed rarefied gas flow simulations using the CFD method, which solves the Navier-Stokes equations within the OpenFOAM framework with working gas as air. The airfoil case is simulated with various Knudsen numbers from 0.026 to 0.26, and the angles-of-attack (AOAs) from 0-deg to 20-deg. The surface gas temperatures predicting by our new temperature jump condition give good agreements with the DSMC data, especially the NACA0012 micro-airfoil cases with the high Knudsen numbers, Kn = 0.1, and Kn = 0.26 with AOA = 20-deg. for the lower surface.


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How to Cite

Le, N. T. P., Vu, N. A., Loc, L. T., & Thoai, T. N. (2017). New temperature jump boundary condition in high-speed rarefied gas flow simulations. Vietnam Journal of Mechanics, 39(2), 165–176.



Research Paper