The face-based stencil used for computing Φf in the Green-Gauss Gradient formula is ________(a) more accurate and needs a large stencil(b) less accurate and needs a large stencil(c) more accurate and needs a compact stencil(d) less accurate and needs a compact stencilThis question was addressed to me in my homework.My question is based upon Diffusion Problem in portion Diffusion Problem of Computational Fluid Dynamics

The face-based stencil used for computing Φf in the Green-Gauss Gradi

1.	The face-based stencil used for computing Φf in the Green-Gauss Gradient formula is ________(a) more accurate and needs a large stencil(b) less accurate and needs a large stencil(c) more accurate and needs a compact stencil(d) less accurate and needs a compact stencilThis question was addressed to me in my homework.My question is based upon Diffusion Problem in portion Diffusion Problem of Computational Fluid Dynamics
Answer» RIGHT choice is (d) less accurate and needs a compact STENCIL To explain: The FACE-based computation of Φf uses a compact stencil INVOLVING face NEIGHBOURS. This is less accurate than the vertex-based computation involving a large stencil of vertex neighbours.

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