Which of these statements is correct about the first step of the ADI scheme?(a) x-derivative is treated implicitly(b) y-derivative is treated implicitly(c) Time derivative is treated implicitly(d) Thomas algorithm is not usedThis question was posed to me in examination.I want to ask this question from CFD Techniques in division Some Simple CFD Techniques of Computational Fluid Dynamics

Which of these statements is correct about the first step of the ADI s

1.	Which of these statements is correct about the first step of the ADI scheme?(a) x-derivative is treated implicitly(b) y-derivative is treated implicitly(c) Time derivative is treated implicitly(d) Thomas algorithm is not usedThis question was posed to me in examination.I want to ask this question from CFD Techniques in division Some Simple CFD Techniques of Computational Fluid Dynamics
Answer» The correct choice is (a) x-derivative is treated IMPLICITLY The explanation is: In the first step with the time interval \(\frac{\Delta t}{2}\), the spatial derivatives are replaced USING the central DIFFERENCE scheme. Only the x-derivative is treated implicitly. Then the resulting equations are solved using the TDMA METHOD.

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