Question

Which grid is used to find the flow field properties using finite difference solutions?

(a) Rectangular grid

(b) Non – rectangular grid

(c) Square grid

(d) Circular grid

I got this question in an interview.

My query is from Philosophy of Method of Characteristics in division Numerical Techniques for Steady Supersonic Flow of Aerodynamics

Answer 1

Right answer is (a) Rectangular grid

The best I can explain: For computing the flow field properties at points in the flow, there is often grid considered in a plane with known properties at one of the grid point. Using that, properties at other grid points can be computed. In the method of characteristics, non – rectangular grid point is considered and for finite – difference solution, rectangular grid is considered.