Abstract:
Results of the implementation and application of adiabatic and isothermal wall boundary conditions with slip and temperature jump in the computational code HyCFS-R for modeling near-continuum flows are presented. Validation was performed on problems with external and internal flows. As an external flow, the flow around a T2-97 cylinder with a skirt was selected; as an internal flow, the propagation of a shock wave in a long tube and the flow in a nozzle at low Reynolds numbers were considered. It was found that, in the case of flow around a cylinder with a skirt, the implementation of the slip boundary condition provides better agreement with experimental data on separation and reattachment points than the no-slip condition. It was shown that, in the calculation with the slip boundary condition, the shock wave propagates along the long tube faster than in the calculation with the no-slip condition. The calculated shock wave propagation velocities are in satisfactory agreement with experimental data. In the case of gas ejection from a nozzle, the use of the slip boundary condition leads to better agreement between the calculated and experimental temperature distributions along the surface.
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