Hutchinson and Raithby [10] proposed a simple additive correction multigrid (ACM) method that has proved effective in reducing the cost of solving an algebraic equation set for a single variable. The equations of fluid motion and heat transfer lead to coupled sets of equations. The present paper outlines how ACM can be extended to solve these equations and reports results for a fluid dynamics and a natural convection problem (where the temperature-velocity coupling is important). The application of ACM to the coupled equations proves to be extremely attractive.
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Hutchinson et al. (1988) studied this question.
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