Question

How many steps does the Alternating Direction Implicit (ADI) scheme involve?

(a) One step

(b) Two steps

(c) Three steps

(d) Four steps

This question was addressed to me in exam.

I'd like to ask this question from CFD Techniques topic in portion Some Simple CFD Techniques of Computational Fluid Dynamics

Answer 1

The correct choice is (b) Two steps

For explanation I would say: The whole process is to initiate from the known values at the time-step t and move on to the required time-step t+Δ t. For this marching, the ADI scheme uses two steps. The solution does not directly move to the final step t+Δ t.