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Modeling the gas flow through the packed bed of DEM particles

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Old   October 12, 2018, 09:43
Default Modeling the gas flow through the packed bed of DEM particles
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Dmitry
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Hi everyone!
I'm modeling the gas flow through the packed bed layers of 2 types of DEM particles. The model is a blast furnace in 2D representation. Packed bed generates with DEM model. Flow solver is freezing during DEM iteraction. Then flow solver is unfeezed and start the flow through the packed bed of DEM particles. During the solution i have some problems and questions:
1. During the solution, I do not see the resistance of the layer of particles to the gas flow. Thу drag force model (i chose Schiller-Naumann model) and two-way coupling model is activated for all lagrangian phases. I make the experiment without DEM particles and got the same velocity fields.
2. How can i speed up the solution? Аfter the formation of a layer, can the DEM solver be frozen? If i freeze the DEM solver after several timesteps particles leave solution domain.
I hope you will help me!
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Old   October 17, 2018, 08:29
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Quote:
Originally Posted by Legat View Post
If i freeze the DEM solver after several timesteps particles leave solution domain.
I hope you will help me!
Check specification of Lagrangian phase on your wall. What type of wall spec are you using.

Quote:
Originally Posted by Legat View Post
How can i speed up the solution? Аfter the formation of a layer, can the DEM solver be frozen?
Yeah, this can be done. This is actually abetter practice. To run DEM until domain is full and then turning it of and running flow model.


More info on problem is recommended. Like some rough sketch, physics models etc.
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Old   October 17, 2018, 10:58
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For a greater understanding of the problem i attach the model files. You can get them by downloading for the following link https://drive.google.com/open?id=1ue...1JzbgKai3svLqY
File "BlastFurnace_DEM_1@07570.sim" have some intermediate resualts. On the vector scene you can see the lack of resistance to the gas flow of the particle layer.
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Old   October 18, 2018, 10:41
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Here is the picture after freezing the DEM solver with unreal velocities. This is the small 3D model in which i applied coupled flow solver. The lagrangian spec on walls is DEM mode.
Attached Images
File Type: jpg 900.jpg (47.6 KB, 29 views)
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Old   June 14, 2022, 13:19
Default Did you find a solution?
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This is also an issue I am facing. With the two way coupling on, my particles end up breaking through the domain wall.

This may be late but did you find a solution to your problem?
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