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The Rhie-Chow interpolation needs a redistribution of the _________

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The Rhie-Chow interpolation needs a redistribution of the _________

(a) source term

(b) pressure gradient term

(c) viscous force term

(d) body force term

This question was posed to me by my school teacher while I was bunking the class.

Query is from Incompressible Flows in chapter Incompressible Flows & Compressible Flows of Computational Fluid Dynamics

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Correct answer is (b) pressure gradient term

The explanation: The body force in the staggered grid term has the exact stencil of the pressure gradients. Therefore, a redistribution of the body force term in the Rhie-Chow interpolation is needed to match the staggered grids.

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