Initial condition of isotropic turbulence

March 1, 2005, 06:41

I want to perform direct numerical simulation of isotropic turbulence. But I donot have initial velocity data of turbulence. Do you know initial velocity data which is opened to the public by web, or by something?

krisshoe · June 12, 2012, 13:26

This is what I did when I needed an initial condition. Start by running your forced isotropic turbulence code for a very coarse mesh (say 16^3) until you reach some statistically steady state. Then, use this result as an initial condition for a more refined run (say 32^3). Keep working your way up until you reach the resolution you need for your simulated flow. This bootstrapping approach provided me with a more rapid way to get to a statistically steady state than just starting and running a very high resolution case all the way through.

March 1, 2005, 06:41	Initial condition of isotropic turbulence	#1
Ye Jianying Guest Posts: n/a	I want to perform direct numerical simulation of isotropic turbulence. But I donot have initial velocity data of turbulence. Do you know initial velocity data which is opened to the public by web, or by something?

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June 12, 2012, 13:26		#2
krisshoe New Member Join Date: Aug 2011 Posts: 9 Rep Power: 15	This is what I did when I needed an initial condition. Start by running your forced isotropic turbulence code for a very coarse mesh (say 16^3) until you reach some statistically steady state. Then, use this result as an initial condition for a more refined run (say 32^3). Keep working your way up until you reach the resolution you need for your simulated flow. This bootstrapping approach provided me with a more rapid way to get to a statistically steady state than just starting and running a very high resolution case all the way through.