Question

In case of a two-dimensional element, which of these will serve as the face area?

(a) Distance of the connecting line

(b) Area of the element

(c) Unit area

(d) Volume of the element

I have been asked this question in an interview.

I would like to ask this question from Types of FVM Elements topic in section Finite Volume Methods of Computational Fluid Dynamics

Answer 1

Correct choice is (a) Distance of the connecting line

To explain: For a two-dimensional element, the area of the element is equivalent to its volume. Similarly, the length of the connecting line is equivalent to the face area. However, the direction of flux is given by a normal vector.