Question

How are the faces of a 3-D element divided to find the area?

(a) Squares

(b) Quadrilaterals

(c) Rectangles

(d) Triangles

I have been asked this question by my college director while I was bunking the class.

My question is based upon The Geometry of FVM Elements topic in division Finite Volume Methods of Computational Fluid Dynamics

Answer 1

Correct answer is (d) Triangles

To elaborate: The faces of a 3-D element are 2-D polygons. With the intention of finding the area of these faces, they are divided into triangles of different type and sizes. Triangles give the advantage of having any length in all three of its sides.