# Pollutant dispersion over a specified terrain

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 June 11, 2016, 11:23 Pollutant dispersion over a specified terrain #1 Member   Almond Wong Join Date: May 2016 Posts: 68 Rep Power: 2 Hi, I am very new to OpenFOAM and CFD (few weeks). I would like to study pollutant dispersion over a specified terrain. Currently, I barely managed to set up the initial flow boundary conditions which are mostly based on OpenFOAM tutorial "turbinesiting". I have no idea as to how to include pollution into the picture. I read a few threads which refer me to the tutorial ScalarTransportFoam but I am still totally lost. Can anyone help explain as to how can dispersion study be built on the existing model (turbinesiting)?

 June 13, 2016, 03:18 #2 Senior Member   Nima Samkhaniani Join Date: Sep 2009 Location: Tehran, Iran Posts: 1,208 Blog Entries: 1 Rep Power: 17 you should solve a transport equation beside p and U to simulate dispersion of pollutant. Therefore you need some programming to add this transport equation to the basic solver that is simpleFoam or pimpleFoam or pisoFoam. __________________ Telegram channel (https://telegram.me/openfoam4Iranian) My Weblog (http://openfoam.blogfa.com/) Training Course on OpenFOAM at (http://www.isme.ir/)

 June 13, 2016, 06:16 #3 Member   Almond Wong Join Date: May 2016 Posts: 68 Rep Power: 2 Hi, thanks for the reply. But I would really appreciate it if you could put it into a simpler term. I am really new to this. As of current, I am using a k-epsilon turbulent model and within the turbinesiting/constant folder, there is already a transportProperties file which defined a Newtonian transportModel (do not know what does this do). Thank you very much in advance

 June 14, 2016, 03:03 #4 Senior Member   Nima Samkhaniani Join Date: Sep 2009 Location: Tehran, Iran Posts: 1,208 Blog Entries: 1 Rep Power: 17 well, as i said before you need programming now you only solve continuity equation and momentum equations which return U and p. for simulation of pollutant dispersion, you need to solve extra transport equation, look this. this equation should be added to your basic solver. so you should modify and extend the existing solver. to learn how to add extra equation to existing solver, read this __________________ Telegram channel (https://telegram.me/openfoam4Iranian) My Weblog (http://openfoam.blogfa.com/) Training Course on OpenFOAM at (http://www.isme.ir/)

 June 16, 2016, 12:47 #5 Member   Almond Wong Join Date: May 2016 Posts: 68 Rep Power: 2 WOW!!! that is a very comprehensive read. I did further reading and came across reactingFOAM, will it do the trick as well. By using it, I could avoid all the programming which are very complicated for me. Another thing, after defining the solver, how can the pollution be introduced? And THANK YOU SO MUCH for entertaining my noobish question. feeling totally overwhelmed with this CFD and OpenFOAM.

 Tags dispersion, pollution

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