Question

Which of these is a disadvantage of the Runge-Kutta method over the multipoint method?

(a) Computational stability

(b) Computational cost

(c) Accuracy

(d) Convergence

The question was posed to me in an internship interview.

This key question is from Transient Flows topic in section Transient Flows of Computational Fluid Dynamics

Answer 1

Right choice is (b) Computational cost

Explanation: Though the Runge-Kutta methods are advantageous in the accuracy and stability perspectives, this comes at the cost of computational cost. Computationally, the Runge-Kutta methods are very expensive when compared to the other methods.