Abstract
This chapter presents a Parallel nonlinear Multi-Grid method for the computation of Turbulent Flows in complex geometries with second-order closure turbulence modeling. It briefly discusses the employed second order moment closure model, which follows the recent approach of the employed numerical procedure based on a finite volume discretization for non-orthogonal block-structured boundary-fitted grids with a collocated arrangement of variables, and a parallel multi-grid procedure with iterative pressure-correction smoothing for the efficient solution of the resulting coupled system of algebraic equations. The chapter investigates the performance of the considered approach with respect to numerical and parallel efficiency by considering two two-dimensional test cases. The results also include comparisons with corresponding computations with a k-є model. The results indicate that with an efficient exploitation of computing power provided by modern parallel computers in connection with advanced numerical techniques like multi-grid methods a significant acceleration of such computations, especially for fine grids, can be achieved.
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