Question

What is Richardson extrapolation used for?

(a) To increase the accuracy

(b) To decrease the error

(c) To create convergence monotony

(d) To increase the rate of convergence

This question was addressed to me in examination.

Question is from Errors in Finite Difference Approximations in section Finite Difference Methods of Computational Fluid Dynamics

Answer 1

The correct choice is (d) To increase the rate of convergence

To elaborate: Richardson extrapolation is a sequence acceleration method. It is used to increase the rate of convergence of a system. In the finite difference method, it is used to find accurate results from the discretized results.