How to speed up the simulation of scour model in FLOW-3D?

Unharuka · July 25, 2021, 22:38

Hello everyone,

When I use the sediment scour model to do some simulation of a 3D pile, I found it was very very slowly although I use 16 processors, 32 processors, even 64 processors.

Maybe I generated too many meshes about 4 millions to 7 millions, because I found that the mesh size play a very important role in scour results. Now what I know is my cases run fastest with 24 processors, however it can only simulate 0.23 s in 1 hour reality.

It confused me for a long time, so if there are any solutions, please tell me, thank you very much.

LT-ZJUT · December 7, 2021, 21:19

Hello, I am a graduate student from Zhejiang University of Technology. I have the same problem as you. My flow-3D water and sediment two-phase simulation calculation is very slow, but the computer configuration is good, so I would like to ask if you have a solution.I would be most grateful if you could give me some advice.You can contact me at the following email address:taoli@zjut.edu.cn

koful · December 30, 2021, 03:48

Hello.

Sedimentation models are very slow. but did you check sediment diameter to cell size ratio? your cell size should be more than 10 times bigger than the sediment diameter. choosing too fine mesh can cause extra long computation times.

July 25, 2021, 22:38	How to speed up the simulation of scour model in FLOW-3D?	#1
Unharuka New Member ZHANG H. Join Date: Aug 2020 Posts: 12 Rep Power: 5	Hello everyone, When I use the sediment scour model to do some simulation of a 3D pile, I found it was very very slowly although I use 16 processors, 32 processors, even 64 processors. Maybe I generated too many meshes about 4 millions to 7 millions, because I found that the mesh size play a very important role in scour results. Now what I know is my cases run fastest with 24 processors, however it can only simulate 0.23 s in 1 hour reality. It confused me for a long time, so if there are any solutions, please tell me, thank you very much.

December 7, 2021, 21:19	I have the same problem as you.	#2
LT-ZJUT New Member 李涛 Join Date: Dec 2021 Posts: 1 Rep Power: 0	Hello, I am a graduate student from Zhejiang University of Technology. I have the same problem as you. My flow-3D water and sediment two-phase simulation calculation is very slow, but the computer configuration is good, so I would like to ask if you have a solution.I would be most grateful if you could give me some advice.You can contact me at the following email address:taoli@zjut.edu.cn

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December 30, 2021, 03:48		#3
koful Member Join Date: Jun 2014 Location: Turkey Posts: 43 Rep Power: 11	Hello. Sedimentation models are very slow. but did you check sediment diameter to cell size ratio? your cell size should be more than 10 times bigger than the sediment diameter. choosing too fine mesh can cause extra long computation times.