Question

The results using the Crank-Nicolson scheme for finite volume approach can be reformulated using the ________

(a) implicit first-order Euler scheme

(b) implicit and explicit first-order Euler schemes

(c) explicit first-order Euler scheme

(d) central difference scheme

The question was asked in a national level competition.

This interesting question is from Transient Flows topic in portion Transient Flows of Computational Fluid Dynamics

Answer 1

Correct answer is (b) implicit and explicit first-order Euler schemes

Best explanation: The finite volume approach using the Crank-Nicolson scheme can be reformulated using the first-order implicit Euler scheme and then the explicit Euler scheme which is modified and used in the form of extrapolation.