Applied Mathematics and Mechanics (English Edition) ›› 2013, Vol. 34 ›› Issue (2): 209-228.doi: https://doi.org/10.1007/s10483-013-1664-7

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Cavitating/non-cavitating flows simulation by third-order finite volume scheme and power-law preconditioning method

P. AKBARZADEH   

  1. School of Mechanical Engineering, Shahrood University of Technology, Shahrood 3619995161, Iran
  • Received:2011-09-07 Revised:2012-09-18 Online:2013-02-03 Published:2013-01-22
  • Contact: P. AKBARZADEH, Ph. D., E-mail: p.akbarzadeh@shahroodut.ac.ir E-mail:p.akbarzadeh@shahroodut.ac.ir

Abstract: Equations of steady inviscid and laminar flows are solved by means of a third-order finite volume (FV) scheme. For this purpose, a cell-centered discretization technique is employed. In this technique, the flow parameters at the cell faces are computed using a third-order weighted averages procedure. A fourth-order artificial dissipation is used for stability of the solution. In order to achieve the steady-state situation, four-step Runge-Kutta explicit time integration method is applied. An advanced progressive preconditioning method, named the power-law preconditioning method, is used for faster convergence. In this method, the preconditioning matrix is adjusted automatically from the velocity and/or pressure flow-field by a power-law relation. Attention is directed towards accuracy and convergence of the schemes. The results presented in the paper focus on steady inviscid and laminar flows around sheet-cavitating and fully-wetted bodies including hydrofoils and circular/elliptical cylinder. Excellent agreements are obtained
when numerical predictions are compared with other available experimental and numerical results. In addition, it is found that using the power-law preconditioner significantly increases the numerical convergence speed.

Key words: hydrofoil, convergence, finite-volume (FV) scheme, cavitation, third-order accuracy, power-law preconditioner

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