Question

When the source term does not vary much, the source term is ___________

(a) implicitly calculated

(b) calculated from the previous iteration’s values

(c) solved simultaneously

(d) calculated form the current values

I have been asked this question in a national level competition.

I need to ask this question from Source Term Discretization topic in chapter Discretization of the Source Term & Relaxation of Computational Fluid Dynamics

Answer 1

Right choice is (b) calculated from the previous iteration’s values

The explanation is: As the source term is a function of the flow variable, it can be calculated using the available Φ values. In an iterative process, the available values are the previous iteration’s flow variable values.