The problem of MFIX-CGP model

MFiX
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1

Hello, researcher. I am using the MFIX-CGP model to simulate the reaction of gas and particles in the reactor. I set up four gas inlets, respectively, in the front, back, left, right of the cylindrical model. And their boundary conditions are the same. However, from the results of vtk, it seems that the movement of particles is not uniform, which makes me feel that only two inlets seem to be working. The following two pictures are the particle temperature results at 0s and 0.17s, respectively. At 0 s, the temperature of all particles was 600 K. But at 0.17 s, the temperature of particles on the left and back sides is significantly higher than that on the front and right sides.

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image870×623 101 KB

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image870×623 104 KB

This is my bug report.

1_2025-10-31T190252.441558.zip (126.1 MB)

2

Please always inspect the mesh before running the simulation. You have separate geometry components (one large vertical cylinder, and 4 smaller cylinders for the inlets), but they are not connected. If you look at the mesh you will see there is no side inlet. It also appears that the mesh is too coarse to resolve the side inlets.

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image1329×883 178 KB

4

Thank you very much. I have solved this problem.