Question

When is the DNS method apt?

(a) For complex flows

(b) For design purposes

(c) For precise details

(d) For economic simulation

I got this question during a job interview.

I would like to ask this question from Direct Numerical Solution for Turbulent Models in section Turbulence Modelling of Computational Fluid Dynamics

Answer 1

The correct choice is (c) For precise details

For explanation: The DNS method is used when we want the precise simulation with all the details in it. They are used for the development and validation of other turbulent models. The transport of any flow variable at any point can be precisely obtained using this model.