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Numerical Heat Transfer, Part B: Fundamentals
An International Journal of Computation and Methodology
Volume 31, 1997 - Issue 2
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Original Articles

A PRESSURE-BASED METHOD FOR UNSTRUCTURED MESHES

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Pages 195-215 | Received 01 Jul 1996, Accepted 05 Aug 1996, Published online: 17 Apr 2007
 

Abstract

This article presents a finite-volume scheme for multidimensional incompressible flows. Unstructured, solution-adaptive meshes composed of arbitrary convex palyhedra are used. A cell-centered equal-order formulation is developed. Gradients required for the evaluation of diffusion fluxes and for second-order-accurate convective operators are found by linear reconstruction. An additive-correction multigrid scheme is used to solve the resulting discrete equations. Pressure and velocity are stored at cell centers; momentum interpolation is used to prevent pressure checkerboarding. The SIMPLE algorithm is used for pressure-velocity coupling. Schemes for hanging-node and conformed adaption are implemented. The scheme is applied to benchmark problems using a variety of quadrilateral/hexahedral, triangular/tetrahedral, and hybrid meshes, and is shown to perform satisfactorily.

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