As per my experience just go step by step. Ie first converge flow then turb and then energy and then activate DPM. If it wont Work then ask me again i have some more tricks.

I recommend you have a try to change SIMPLE method to SIMPLEC method. Maybe it will work normally.

Try to adjust the solution control value by lowering the value of under relaxation factors.

Can you explain the work?

As per my experience just go step by step. Ie first converge flow then turb and then energy and then activate DPM. If it wont Work then ask me again i have some more tricks.

Start with a lower pressure and work your way up step by step.

In my experience, I got trouble when simulate with high pressure due to mesh size. At high pressure, the density is high hence kinematic viscosity is low. As a result, the Reynolds number is high and the problem requires very fine mesh near the wall. If you calculated with low pressure first, then change to higher pressure the mesh should be carefully refined.

@panayampilly

about mesh - details

1.Hybrid mesh are used (hexahedral and tetrahedral)

2.Total cell count = 5.84 million

3.Tetrahedral mesh are retained and NOT converted into polyhedral mesh

boundary condition

since its a DPM model, primary phase P = 4.5 MPA T = 1173 K

sec phase is P = 4.52 atm and T =323 K

rossin rammler distribution is used

species transport used N2 and He - mass fraction 0.2 is used

turbulent flow : k-omega SST

Can you send a picture of meshed geometry? [email protected]

The suggestions given by Mr. Vikash Kumar Singh Chauhan are meaningful and refining the mesh will not always give a good solution rather than computationally more expensive.

Regards

I thing that the best way is to decrease drastically the CFL number at the first steps.

Regards

thanks vikash .. it worked when i used your steps !! :)