【Daily Question】Theoretical Foundation 2020.11.14
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Multiple-choice question: The question is shown in the image ( ). Answer: B. Hint: Those who can explain the solution process will receive an additional reward; the answer can be submitted there
B, A, D are too absolute. But I haven’t learned this part yet*. Could you recommend a book on this topic? I want to go take a look.
The answer is B. For the two AC terms, the explicit difference equation for internal nodes requires stability conditions; that is, the values of △x and △r must satisfy F0≤1/2. Error ； Option B; whereas the implicit difference scheme can be used unconditionally, with the selection of △x and △r being independent of each other – correct ； Option D: The central difference scheme under steady-state conditions can also be divergent; this is incorrect.