Numerical analysis of the Taylor-vortex flow of a slightly rarefied gas. (English) Zbl 1360.35136
Summary: The axisymmetric Taylor-vortex flow of a rarefied gas between two coaxial circular cylinders, a rotating inner cylinder and a resting outer one, is investigated numerically for small Knudsen numbers on the basis of the compressible Navier-Stokes (CNS) equations and their appropriate slip boundary conditions. The accuracy of the result as an approximate solution to the Boltzmann equation is confirmed by comparing it with the result obtained by the direct simulation Monte Carlo (DSMC) method for Knudsen numbers of the order of \(10^{-2}\). The flow field for smaller Knudsen numbers (of the order of \(10^{-3}\)) exhibits a boundary-layer like structure near the cylinders. It is shown that, compared with the cylindrical Couette flow, the velocity slip in the circumferential direction is enhanced in the Taylor-vortex flow.
MSC:
35Q30 | Navier-Stokes equations |
35A35 | Theoretical approximation in context of PDEs |
76N15 | Gas dynamics (general theory) |
35Q20 | Boltzmann equations |
76P05 | Rarefied gas flows, Boltzmann equation in fluid mechanics |
76B47 | Vortex flows for incompressible inviscid fluids |
65C05 | Monte Carlo methods |
76F65 | Direct numerical and large eddy simulation of turbulence |
76M28 | Particle methods and lattice-gas methods |
Keywords:
compressible Navier-Stokes (CNS) equations; Boltzmann equation; Monte Carlo method; Couette flow; vortex flowReferences:
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