# Calculating mixing Index

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 October 9, 2008, 04:21 Calculating mixing Index #1 Syaiful Guest   Posts: n/a Hi, 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

 October 9, 2008, 08:46 Re: Calculating mixing Index #2 James Guest   Posts: n/a Perhaps you could provide a detailled definition of what you wish to calculate for the ignorant amongst us.

 October 9, 2008, 12:27 Re: Calculating mixing Index #3 Syaiful Guest   Posts: n/a 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

 January 6, 2009, 02:53 Re: Calculating mixing Index #4 Tushi Chakravarty Guest   Posts: n/a Please send me the method for calculation of Mixing Index.

 February 7, 2009, 03:04 Hello All, just a newbie here saying hello #5 forexguy Guest   Posts: n/a 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. THanks!

 January 14, 2010, 02:24 #6 New Member   Mahmoud shana'ah Join Date: Jan 2010 Posts: 1 Rep Power: 0 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. Mahmoud.

 August 27, 2015, 00:40 #7 Senior Member   Join Date: Jun 2014 Location: Taiwan Posts: 100 Rep Power: 7 I think that you can try uniformity index in Report→Surface intergral. The formula is in the manual. Just type and search it.