Viscous boundary layer minimum wall thickness

balkrishan · March 6, 2018, 04:20

I am doing low Reynolds no. CFD analysis, and I am not able to decide the minimum wall grid $\Delta$ x required .

lcarasik · March 7, 2018, 22:57

Quote:

Originally Posted by balkrishan

I am doing low Reynolds no. CFD analysis, and I am not able to decide the minimum wall grid $\Delta$ x required .

What have you done so far?

balkrishan · March 8, 2018, 11:27

I am working on supersonic micronzzles, I have to simulate the flow inside it to study the effect.

I am working in continuum regime, so I need to give dense grid towards the wall of nozzle in order to capture viscous boundary layer.

I want some criteria to decide the minimum wall grid size, like in turbulent flow we have y+ to give minimum wall $\Delta$ x

March 6, 2018, 04:20	Viscous boundary layer minimum wall thickness	#1
balkrishan Member Bal Krishan Join Date: Jul 2017 Posts: 43 Rep Power: 8	I am doing low Reynolds no. CFD analysis, and I am not able to decide the minimum wall grid $\Delta$ x required .

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March 8, 2018, 11:27		#3
balkrishan Member Bal Krishan Join Date: Jul 2017 Posts: 43 Rep Power: 8	I am working on supersonic micronzzles, I have to simulate the flow inside it to study the effect. I am working in continuum regime, so I need to give dense grid towards the wall of nozzle in order to capture viscous boundary layer. I want some criteria to decide the minimum wall grid size, like in turbulent flow we have y+ to give minimum wall $\Delta$ x