Unable to run lid-driven cavity flow with 1M elements

dougalb · October 17, 2013, 21:19

I am trying to recreate a set of tests done for the hpcadvisorycouncil - http://www.hpcadvisorycouncil.com/pd...l_2680_FCA.pdf

It calls for "Lid Driven Cavity Flow - 1 Million elements, 2D, icoFoam solver for laminar, isothermal, incompressible flow", so I have taken the OpenFOAM tutorial and modified the blockMesh to be 1000 x 1000 versus 20 x 20. When I run, it gives me a "floating point error".

Any tips or ideas how I can configure the case to match the example cited? My goal is to run it on 1,2,4,8,16,32,64 cores.

haakon · October 18, 2013, 03:31

I think it would be useful to give us some more information, for example a more detailed error message.

My first suspicion is that you have a too large timestep tough... A 1M mesh in 2D would imply 1000x1000 cells (if square), and that require a very small timestep, in special because your top corners will behave as singular points with high velocities.

puneet336 · April 7, 2019, 00:34

Hi hakon, dougalb
I am trying the same experiment,

Post is here -
Setting up Lid driven Cavity Benchmark with 1M cells for multiple cores

input files for cavity experiment is here
This is the error message i am getting , could you please advice.

October 17, 2013, 21:19	Unable to run lid-driven cavity flow with 1M elements	#1
dougalb New Member dougal Join Date: Oct 2013 Posts: 1 Rep Power: 0	I am trying to recreate a set of tests done for the hpcadvisorycouncil - http://www.hpcadvisorycouncil.com/pd...l_2680_FCA.pdf It calls for "Lid Driven Cavity Flow - 1 Million elements, 2D, icoFoam solver for laminar, isothermal, incompressible flow", so I have taken the OpenFOAM tutorial and modified the blockMesh to be 1000 x 1000 versus 20 x 20. When I run, it gives me a "floating point error". Any tips or ideas how I can configure the case to match the example cited? My goal is to run it on 1,2,4,8,16,32,64 cores.

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October 18, 2013, 03:31		#2
haakon Senior Member Join Date: Dec 2011 Posts: 111 Rep Power: 20	I think it would be useful to give us some more information, for example a more detailed error message. My first suspicion is that you have a too large timestep tough... A 1M mesh in 2D would imply 1000x1000 cells (if square), and that require a very small timestep, in special because your top corners will behave as singular points with high velocities.

April 7, 2019, 00:34		#3
puneet336 New Member puneet Join Date: Nov 2015 Posts: 19 Rep Power: 11	Hi hakon, dougalb I am trying the same experiment, Post is here - Setting up Lid driven Cavity Benchmark with 1M cells for multiple cores input files for cavity experiment is here This is the error message i am getting , could you please advice.