Reference for turbulence flat-plat with DNS in 2d

mathletic · December 6, 2016, 08:18

I am looking for a reference (book or peer-reviewed article) which computes turbulence flow across a flat plate with DNS in 2d. All I found were 3d cases (e.g. Spalart 1988) or 2d with a turbulence model (e.g US wind verification). I am specially interested in a grid, that is fine enough and is proven to be so.

Would it be ok to take a 2d slice from one of the 3d models? I am aware of the fact, that turbulence is a three-dimensional effect. But 3d is too difficult in my case.

FMDenaro · December 6, 2016, 08:31

You cannot find a 2D DNS on flat plate simply because it does not exist, it is 3D and it is necessary to have the three-dimensionaly preserved to allow turbulence to develop from initial homogeneous velocity..

mathletic · December 7, 2016, 10:15

Ok, thanks for the confirmation.

What is the smallest grid to have turbulence over a flat plat in 3d? I want to use a classical MAC scheme. Most references use millions of grid points, I'd like as few as possible

FMDenaro · December 7, 2016, 11:02

you need O(10^9) nodes

December 6, 2016, 08:18	Reference for turbulence flat-plat with DNS in 2d	#1
mathletic New Member Join Date: Sep 2011 Location: Germany Posts: 7 Rep Power: 14	I am looking for a reference (book or peer-reviewed article) which computes turbulence flow across a flat plate with DNS in 2d. All I found were 3d cases (e.g. Spalart 1988) or 2d with a turbulence model (e.g US wind verification). I am specially interested in a grid, that is fine enough and is proven to be so. Would it be ok to take a 2d slice from one of the 3d models? I am aware of the fact, that turbulence is a three-dimensional effect. But 3d is too difficult in my case.

December 6, 2016, 08:31		#2
FMDenaro Senior Member Filippo Maria Denaro Join Date: Jul 2010 Posts: 6,768 Rep Power: 71	You cannot find a 2D DNS on flat plate simply because it does not exist, it is 3D and it is necessary to have the three-dimensionaly preserved to allow turbulence to develop from initial homogeneous velocity.. mathletic, davidwilcox and lcarasik like this.

December 7, 2016, 10:15	Small 3d example?	#3
mathletic New Member Join Date: Sep 2011 Location: Germany Posts: 7 Rep Power: 14	Ok, thanks for the confirmation. What is the smallest grid to have turbulence over a flat plat in 3d? I want to use a classical MAC scheme. Most references use millions of grid points, I'd like as few as possible

December 7, 2016, 11:02		#4
FMDenaro Senior Member Filippo Maria Denaro Join Date: Jul 2010 Posts: 6,768 Rep Power: 71	you need O(10^9) nodes mathletic likes this.

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