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DNS can solve _____________

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in Computational Fluid Dynamics by (118k points)
DNS can solve _____________

(a) transient 3-D equations

(b) steady-state 3-D equations

(c) transient 2-D equations

(d) steady-state 2-D equations

This question was posed to me during an online exam.

My enquiry is from Direct Numerical Solution for Turbulent Models topic in portion Turbulence Modelling of Computational Fluid Dynamics

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Best answer
Right answer is (a) transient 3-D equations

Easiest explanation: The starting set of equations is taken by the DNS system and the transient 3-D solution is done for a sufficiently fine spatial mesh and sufficiently small time-step sizes to resolve even the smallest turbulent eddies.

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