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Syaiful October 9, 2008 03:21

Calculating mixing Index

I want to calculate a mixing index of ammonia at several cross section areas in the SCR modeling. How to calculate it in STAR CD? Anybody can help me?

Thanks Syaiful

James October 9, 2008 07:46

Re: Calculating mixing Index
Perhaps you could provide a detailled definition of what you wish to calculate for the ignorant amongst us.

Syaiful October 9, 2008 11:27

Re: Calculating mixing Index
In order to know uniformity of ammonia distribution I need to calculate a mixing index. In calculating a mixing index at a section area, I need to account one of surface area of each cell which has same ammonia concentration. I already calculated it by using "Utility" in STAR CD. However I account one by one cell area to obtain the total areas with the same ammonia concentration and this need much more time. I read a paper which has calculated the mixing index by using FLuent but they did not inform how they got it.

thansk a lot

Tushi Chakravarty January 6, 2009 01:53

Re: Calculating mixing Index
Please send me the method for calculation of Mixing Index.

forexguy February 7, 2009 02:04

Hello All, just a newbie here saying hello
Hello All,

I am new here and just wanted to introduc myself.

I have a few questions but I will first search for the answers before asking them just in case they have been asnwered.


asemmsh January 14, 2010 01:24

Dear All,

i am new member, i need your help to get the method of calculating the mixing index, in other words, i have two reactors, different sizes, different
agitator shape/ type, my question is how to assure their euivalency from mixing point of view.

Many thanks all for your prompt answer.


SJSW August 26, 2015 23:40

I think that you can try uniformity index in Report→Surface intergral.
The formula is in the manual.
Just type and search it.

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