Question

The following plot represents flow velocity. Which of these points has the highest acceleration?

(a) 1

(b) 2

(c) 3

(d) 4

This question was addressed to me at a job interview.

This question is from Simple CFD Techniques topic in portion Some Simple CFD Techniques of Computational Fluid Dynamics

Answer 1

Right option is (b) 2

The explanation: High acceleration means highly varying velocity. In a contour plot, the points with high gradient are represented by close lines. Point 2 has lines very close to each other. Therefore, point 2 has the highest acceleration.