Question

Is second order accuracy occurs at a time?

(a) True

(b) False

This question was addressed to me in an interview.

The doubt is from Flow over Sphere in chapter Three-Dimensional Incompressible Flow of Aerodynamics

Answer 1

Correct answer is (a) True

The explanation is: Central differencing of second order accuracy both in time and space is utilized. Experiments with numerical stability show an appreciable deviation from linearized stability analysis due to the large gradients of vorticity in the field.