Abstract
A local grid refinement method is presented and applied to a three-dimensional turbulent recirculating flow. It is based on the staggered grid arrangement. The computational domain is covered by block-structured subgrids of different refinement levels. The exchange of information between the subgrids is fully conservative and all grids are treated implicitly. This allows for a simultaneous solution of one variable in all grids. All variables are stored in one-dimensional arrays. The solver selected for the solution of the discretised finite difference equations is the preconditioned bi-conjugate gradient (Bi-CG) method
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