Volume 36 Issue 8
Aug.  2010
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Cao Ning, Wu Songping. Numerical dissipation of Roe’s scheme with preconditioning for low-speed flows[J]. Journal of Beijing University of Aeronautics and Astronautics, 2010, 36(8): 904-908. (in Chinese)
Citation: Cao Ning, Wu Songping. Numerical dissipation of Roe’s scheme with preconditioning for low-speed flows[J]. Journal of Beijing University of Aeronautics and Astronautics, 2010, 36(8): 904-908. (in Chinese)

Numerical dissipation of Roe’s scheme with preconditioning for low-speed flows

  • Received Date: 28 Jan 2010
  • Publish Date: 30 Aug 2010
  • Preconditioning is necessary for simulating of low-speed flows with Roe-s scheme. With most research on choosing preconditioning parameter, the solution may be wrong. Numerical experiments show the numerical dissipation of the scheme has a notable effect on low-speed flow numerical simulation with preconditioning method. A manner by using an adjustable parameter in preconditioning Roe-s scheme to control the numerical dissipation was proposed. The numerical dissipation of preconditioning Roe-s scheme with an adjustable parameter was more similar to the real dissipation of low-speed flows and reflected the real physical phenomena of low-speed flows. Numerical results show the efficiency of the new scheme and the low Reynold-number steady solutions of viscous flow past a circular cylinder and square cavity flow are satisfied. Also indicate that the applicability of the new scheme and different low Mach number with the same low Reynold-number steady solutions of viscous flow past a circular cylinder are also satisfied.

     

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