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TDMA and PDMA are particularly suitable for _____________

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TDMA and PDMA are particularly suitable for _____________

(a) Cartesian grid problems

(b) Curvilinear grid problems

(c) Unstructured grid problems

(d) Structured grid problems

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Question is from Numerical Methods in division Numerical Methods of Computational Fluid Dynamics

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Correct option is (d) Structured grid problems

Explanation: When a structured grid is used for discretization, it results in a coefficient matrix with its non-zero elements aligning along a few diagonals. The number of non-zero diagonals depends on the discretization stencil and the dimension of the problem. So, TDMA and PDMA are suitable to solve this kind of banded matrix.

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