Question

Conservation of the flow properties should be ensured in __________

(a) both the global and local domains

(b) the global domain only

(c) the local domain only

(d) the global domain and optionally in the local domain

This question was addressed to me in an online interview.

This intriguing question comes from Discretization Aspects topic in portion Basic Aspects of Discretization, Grid Generation with Appropriate Transformation of Computational Fluid Dynamics

Answer 1

The correct option is (a) both the global and local domains

The explanation is: We know that the conservation laws govern the flows and the properties like energy and mass are conserved in the global domain. This must be applicable to the local domain also after discretization. Otherwise, the solution will be unrealistic.