How to calculate the Turbulence Itensity in LES

March 29, 2005, 06:03

I am now using the fluent LES model to simulate a trasition problem. Can someone told me how to calculate the Turbulence Itensity and other parameters with the result that get from fluent LES model ? Now all these parameters is empty.

April 4, 2005, 14:28

Fluent will calculate it for you. You can either view the data through contours, monitor through a surface monitor, or just go to report values for an average.

April 13, 2005, 14:52

A quick note here:

By Default the method used for calculating the Turbulence Intensity in the panels is not accurate. This is already documented. Fluent uses a constant velocity as specified under Report -> Reference values.

It is considered more instructive to use sqrt(2*k_phase/3) / |v_phase| in a custom field function and then obtain your Turbulence Intensity values from there.

March 29, 2005, 06:03	How to calculate the Turbulence Itensity in LES	#1
Jiang Ning Guest Posts: n/a	I am now using the fluent LES model to simulate a trasition problem. Can someone told me how to calculate the Turbulence Itensity and other parameters with the result that get from fluent LES model ? Now all these parameters is empty.

April 4, 2005, 14:28	Re: How to calculate the Turbulence Itensity in LE	#2
Chetan Kadakia Guest Posts: n/a	Fluent will calculate it for you. You can either view the data through contours, monitor through a surface monitor, or just go to report values for an average.

April 13, 2005, 14:52	Re: How to calculate the Turbulence Itensity in LE	#3
pUl\| Guest Posts: n/a	A quick note here: By Default the method used for calculating the Turbulence Intensity in the panels is not accurate. This is already documented. Fluent uses a constant velocity as specified under Report -> Reference values. It is considered more instructive to use sqrt(2*k_phase/3) / \|v_phase\| in a custom field function and then obtain your Turbulence Intensity values from there.

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