Question

Periodic or cyclic boundary conditions are a type of ____________

(a) wall boundary conditions

(b) constant pressure boundary conditions

(c) inlet boundary conditions

(d) symmetry boundary conditions

This question was posed to me during an online interview.

This question is from Boundary Conditions topic in portion Boundary Conditions of Computational Fluid Dynamics

Answer 1

The correct option is (d) symmetry boundary conditions

The best I can explain: Periodic or cyclic boundary conditions are repeated symmetry boundary conditions. The matching of variables in Periodic or cyclic boundary conditions is done in the same way how it is done for symmetry boundary conditions.