The direction of the normal vector to a face in mesh ____________
(a) is from the owner element to the neighbour element
(b) is from the neighbour element to the owner element
(c) is in the direction of the flux
(d) is in the direction opposite to the flux
The question was posed to me during an internship interview.
This intriguing question comes from Numerical Methods topic in portion Numerical Methods of Computational Fluid Dynamics