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Old   August 22, 2005, 22:25
Default Backward Step:DPM
  #1
mjkukbm
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Hi All

I am trying to simulate multiphase using the discrete phase model over a backward facing step.The problem I am haveing is that the injection of particles don't seem to spread at all and continue in a straight line and don't enter the recirculation zone behind the step.

Is this a problem with the v-velocity component of the injection? This is unknown to me at the start of the simulation but I have set to 0.01 m/s (instead of default of zero)in the injection panel, however this produces a value 10 times to big in the flow field when compared with literature (0.1m/s).

Can anyone advise me on this matter?

Thanks

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Old   August 26, 2005, 11:07
Default Re: Backward Step:DPM
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David
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Hi

did you get a positive response to this?

I do not know the answer but I would be interested to know.

David
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Old   August 29, 2005, 05:16
Default Re: Backward Step:DPM
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mjkukbm
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Hi

No I still haven't had any luck in succesfully replicating the flow of the particles around the step. I gave it even more v velocity at the injection to effectively exaggerate the sideways movement of the particles but they still carry on in a straight line.

I am beginning to think there maybe something up with Fluents discrete phase model with regards to this specific scenario or I am overlooking something very obvious.

Has any one else previously modelled a backward step using DPM? I would appreciate any advice.

Thanks
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