Ni Migjiu, Xi Guang, Wang Shangjin. Construction of High-Order Accuracy Implicit Residual Smoothing Schemes[J]. Applied Mathematics and Mechanics, 2000, 21(4): 365-372.
Citation: Ni Migjiu, Xi Guang, Wang Shangjin. Construction of High-Order Accuracy Implicit Residual Smoothing Schemes[J]. Applied Mathematics and Mechanics, 2000, 21(4): 365-372.

Construction of High-Order Accuracy Implicit Residual Smoothing Schemes

  • Received Date: 1998-01-06
  • Rev Recd Date: 1999-12-03
  • Publish Date: 2000-04-15
  • Referring to the construction way of Lax-Wendroff scheme,new IRS(Implicit Residual Smoothing) schemes have been developed for hyperbolic,parabolic and hyper-parabolic equations.These IRS schemes have 2nd-or 3rd-order time accuracy,and can extend the stability region of basic explicit time-stepping scheme greatly and thus can permit higher CFL number in the calculation of flow field.The central smoothing and upwind-bias smoothing techniques have been developed too.Based on one-dimensional linear model equation,it has been found that the scheme is unconditionally stable according to the von-Neumann analysis.The limitation of Dawes' method,which has been applied in turbomachinery widespreadly,has been discussed on solving steady flow and viscous flow.It is shown that stable solution of this method is not completely independent with the value of time step.In the end,numerical results by using IRS schemes and Dawes' method as well as TVD(total variation diminishing) scheme and four-stage Runge-Kutta technique are presented to verify the analytical conclusions.
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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