Divergence when copy the main folders to somewhere else

Hart45454 · May 15, 2021, 22:21

Hi all!

I am new to OpenFOAM so hopefully it's not a dumb question...
Recently I was using multiphaseEulerFoam to simulate a gas solid case. At first the case run well, and it converged successfully. However, when I copy the 0, constant and system folders to a new folders without changing any parameters, the new one just diverged. This problem happened to me a lot of times before. And now no matter how I change the parameters in the new folders, it just kept giving the same error message. Anyone knows why it happens?

Thanks in advance!!

hdotyao · May 18, 2021, 21:47

Hi Hart,
I suggest you could try to reduce the time step in controlDict. Sometimes this happens when the time step is too large.

Hart45454 · May 18, 2021, 22:28

Hi Xiaobo
That acually help!! Thank you very much

May 15, 2021, 22:21	Divergence when copy the main folders to somewhere else	#1
Hart45454 New Member Haotong XIN Join Date: Oct 2020 Posts: 2 Rep Power: 0	Hi all! I am new to OpenFOAM so hopefully it's not a dumb question... Recently I was using multiphaseEulerFoam to simulate a gas solid case. At first the case run well, and it converged successfully. However, when I copy the 0, constant and system folders to a new folders without changing any parameters, the new one just diverged. This problem happened to me a lot of times before. And now no matter how I change the parameters in the new folders, it just kept giving the same error message. Anyone knows why it happens? Thanks in advance!!

May 18, 2021, 21:47		#2
hdotyao New Member Xiaobo YAO Join Date: Oct 2020 Posts: 9 Rep Power: 5	Hi Hart, I suggest you could try to reduce the time step in controlDict. Sometimes this happens when the time step is too large. Hart45454 and allanZHONG like this.

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May 18, 2021, 22:28		#3
Hart45454 New Member Haotong XIN Join Date: Oct 2020 Posts: 2 Rep Power: 0	Hi Xiaobo That acually help!! Thank you very much