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non-premixed combustion in the open space

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Old   December 7, 2009, 22:33
Default non-premixed combustion in the open space
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Meng yifei
Join Date: Dec 2009
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hello, everyone
i am trying to simulate a poolfire in the open space these days. but i can't get the right result. the boundary conditions are labeled on the following picture.
chosen models: K-ε model; non-premixed combustuion model;prePDF
material: ch4-air

and the temperture field is as the following picture

it seems that the outside air can't disperse into the computation area smoothly.
Please tell me the reason of the bad result, thank you !
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