A Segmented Domain Decomposition Multigrid (SDDMG) procedure was developed for viscous flow problems as they apply to turbomachinery flows. The procedure divides the computational domain into a coarse mesh comprised of uniformly spaced cells. To resolve smaller length scales such as the viscous layer near a surface, segments of the coarse mesh are subdivided into a finer mesh. This is repeated until adequate resolution of the smallest relevant length scale is obtained. Multigrid is used to communicate information between the different grid levels . To test the procedure, simulation results will be presented for a compressor and turbine cascade. These simulations are intended to show the ability of the present method to generate grid independent solutions. Comparisons with data will also be presented. These comparisons will further demonstrate the usefulness of the present work for they allow an estimate of the accuracy of the flow modeling equations independent of error attributed to numerical discretization.
A Solution Strategy Based on Segmented Domain Decomposition Multigrid for Turbomachinery Flows
Contributed by the International Gas Turbine Institute and presented at the International Gas Turbine and Aeroengine Congress and Exhibition, New Orleans, Louisiana, June 4–7, 2001. Manuscript received by the IGTI, January 30, 2001. Paper No. 2001-GT-435. Review Chair: R. A. Natale.
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Celestina, M. L., Adamczyk, J. J., and Rubin, S. G. (July 10, 2002). "A Solution Strategy Based on Segmented Domain Decomposition Multigrid for Turbomachinery Flows ." ASME. J. Turbomach. July 2002; 124(3): 341–350. https://doi.org/10.1115/1.1451085
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