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The cell-centred arrangements are disadvantageous when we have ___________

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The cell-centred arrangements are disadvantageous when we have ___________

(a) Non-conjunctional and non-orthogonal elements

(b) Conjunctional and orthogonal elements

(c) Unstructured and non-orthogonal elements

(d) Structured and orthogonal elements

I had been asked this question during an interview.

The above asked question is from Variable Arrangement in FVM in portion Finite Volume Methods of Computational Fluid Dynamics

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The correct answer is (a) Non-conjunctional and non-orthogonal elements

Easy explanation: The treatment of non-conjunctional elements and the manner the diffusion term is discretized for non-orthogonal grids are disadvantages of cell-centred arrangements. They cannot produce good results in these cases.

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