DPM drag UDF

Hanz · June 1, 2009, 15:25

Hi,

I'm currently writing my first UDF

but am a bit stuck

I need to call the properties of the gas in which the inert particle resides in order to write the equation for drag, such as temperature, Cp etc. I'm currently using the Macro DEFINE_DPM_DRAG(particle_drag_force, Re, p).

Any help would be great.

Hanz

mail.leonardo · June 28, 2016, 17:50

Hello Hanz,
I hope you have solved yout problem meantime

I am actually about start working on writing an UDF to modify the drag law in the DPM framwork. In particular I should use the Syamlal O'Brian (parametric with Umf and Epsilon on fluidization onset from the experiment) drag law as I did for the TFM. I know that there is an old tutorial for the TFM multiphase application (made when ansysis still did not have this feature already implemented inside) but now I am struggling to figure how to apply the same procedure into the DPM scheme. Do you have any idea at this regard?
Thanks a lot for your attention and support,

Leonardo

June 1, 2009, 15:25	DPM drag UDF	#1
Hanz New Member Join Date: Jun 2009 Posts: 14 Rep Power: 17	Hi, I'm currently writing my first UDF but am a bit stuck I need to call the properties of the gas in which the inert particle resides in order to write the equation for drag, such as temperature, Cp etc. I'm currently using the Macro DEFINE_DPM_DRAG(particle_drag_force, Re, p). Any help would be great. Hanz

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June 28, 2016, 17:50		#2
mail.leonardo New Member Leo Join Date: Jul 2014 Posts: 7 Rep Power: 12	Hello Hanz, I hope you have solved yout problem meantime I am actually about start working on writing an UDF to modify the drag law in the DPM framwork. In particular I should use the Syamlal O'Brian (parametric with Umf and Epsilon on fluidization onset from the experiment) drag law as I did for the TFM. I know that there is an old tutorial for the TFM multiphase application (made when ansysis still did not have this feature already implemented inside) but now I am struggling to figure how to apply the same procedure into the DPM scheme. Do you have any idea at this regard? Thanks a lot for your attention and support, Leonardo