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March 16, 2015, 03:36 |
How do I set up initial particles condition?
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#1 |
New Member
sohn donh kyung
Join Date: Mar 2015
Posts: 3
Rep Power: 11 |
Hello.
I wanna simulate a fluidized bed reactor with initial particle condition by using fluent DPM. but, I am so confused about making initial information file for particles. I made file like below and set up by injection ---------file start--------------------------------------------------------------- ((x y z u v w temperature diameter mass-flow)name) ((-0.0060 -0.0735 0.0015 0.0 0.0 0.0 300.0 0.0025 0.0) injection-0:0) ((-0.0030 -0.0735 0.0015 0.0 0.0 0.0 300.0 0.0025 0.0) injection-0:1) .... ---------file end---------------------------------------------------------------- but, I only can see below massage --------------------------------------------------------------------------------- ERROR reading particle 0 for injection: injection-0. Particle streams from injection-0: STREAM ...........................INITIAL VALUES........................... NO TYP (X) (Y) (Z) (U) (V) (W) (T) (DIAM) (MFLOW) ... --------------------------------------------------------------------------------- I don't know what is the problem. T T Please anybody help me. thank you for your help!! sohn |
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March 16, 2015, 04:55 |
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#2 |
Senior Member
Join Date: Mar 2015
Posts: 892
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Is the line "((x y z u v w temperature diameter mass-flow)name)" literally in the injection file? Remove this line.
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March 16, 2015, 08:31 |
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#3 |
New Member
sohn donh kyung
Join Date: Mar 2015
Posts: 3
Rep Power: 11 |
Thank you, e.
The error massage disappears due to your recommendation. But, I have a new problem. I can't find my initial particle in my domain through the calculation!! I want that my particles just stay at given position. What can I do for that? Regards sohn |
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March 16, 2015, 16:06 |
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#4 |
Senior Member
Join Date: Mar 2015
Posts: 892
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If you wanted your particles to remain stationary (why?) you could set the drag, gravity and other particle forces to zero. Then your particle would have zero acceleration and remain still.
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March 17, 2015, 00:12 |
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#5 |
New Member
sohn donh kyung
Join Date: Mar 2015
Posts: 3
Rep Power: 11 |
Thank you for kind answer, e
I mean.. I can't see any particles in my domain. It seems that the initial particles don't evolve in my computation. I still see below massage while the 'ERROR' word disappear. ---------------------------------------------------------------------------- Particle streams from injection-0: STREAM ...........................INITIAL VALUES........................... NO TYP (X) (Y) (Z) (U) (V) (W) (T) (DIAM) (MFLOW) .... ----------------------------------------------------------------------------- Maybe is this the problem? What can I do for that? Regards sohn |
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March 17, 2015, 04:17 |
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#6 |
Senior Member
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Try setting a mass flow rate for the injection streams.
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June 29, 2015, 08:17 |
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#7 |
New Member
Eric Bachmann
Join Date: Jun 2015
Posts: 2
Rep Power: 0 |
Hi,
I am new to Fluent and I am also doing DPM and DEM. I think the order in your injection file is not right. My files are in this order: ((x y z u v w diameter temperature mass-flow)name) And I´m not using a header in my files. Also you have to set a massflow. Use a very small stoptime (smaller than your timesteps) in your injection an than you have to set your massflow like this: mf = mass of one particle / stoptime Hopefully this works for you. Regards |
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Tags |
dpm, fluent, injection, particle |
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