Question

Which of these is used to analyse the stability of a system?

(a) Nusselt number

(b) Courant number

(c) Peclet number

(d) Von Neumann’s method

I have been asked this question in a national level competition.

My enquiry is from Discretization Aspects in portion Basic Aspects of Discretization, Grid Generation with Appropriate Transformation of Computational Fluid Dynamics

Answer 1

Correct choice is (d) Von Neumann’s method

For explanation: Von Neumann’s method is a widely used method of analysing the stability of any mathematical system. Since CFD uses numerical methods to solve problems, Von Neumann’s method is applicable to the CFD schemes also.