Question

When coupled equations are ___________ sequential solutions are used.

(a) linear and highly coupled

(b) non-linear and uncoupled

(c) linear and uncoupled

(d) non-linear and highly coupled

I have been asked this question during a job interview.

This intriguing question comes from Numerical Methods in section Numerical Methods of Computational Fluid Dynamics

Answer 1

Right answer is (a) linear and highly coupled

To explain I would say: There are two ways to solve coupled equations – simultaneous and sequential. In the simultaneous methods, equations are solved together for the unknowns. The sequential methods are used to solve a highly coupled system with linear equations.