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The general discretized equation is modified for ____________

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The general discretized equation is modified for ____________

(a) the central control volume

(b) the boundary control volumes

(c) the non-boundary control volumes

(d) the interior control volumes

The question was posed to me in an international level competition.

I need to ask this question from FVM for 1-D Steady State Diffusion in section Diffusion Problem of Computational Fluid Dynamics

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The correct answer is (b) the boundary control volumes

The best explanation: There is special attention needed at the boundary nodes. For control volumes that are adjacent to the domain boundaries, the equation is modified so that the boundary values are incorporated into the equation without any problem.

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