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[blockMesh] Problem with running blockMesh

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Old   October 29, 2022, 00:35
Default Problem with running blockMesh
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Yoshi Yagi
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Hi All,


I am totally new to the world of openFoam and I have been trying to follow along with this tutorial: https://eddylicious.readthedocs.io/e...nnel_lund.html


In particular, I am stuck on step 4 in which the tutorial asks me to run "blockMesh." My problem is that I am running into fatal errors when I run "blockMesh" in the terminal. I am using Ubuntu 22 and OpenFOAM 10.


I have tried running blockMesh from different directories within the precursor folder, but always end up with some Fatal Error.



These are the errors I am getting:



// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Not deleting polyMesh directory
"/home/yoshiyagi/eddylicious/tutorials/channel_flow_lund_rescaling/precursor/constant/polyMesh"
because it contains blockMeshDict
Reading "blockMeshDict"



--> FOAM FATAL ERROR:
Cannot find file "system/blockMeshDict"


From function int main(int, char**)
in file blockMesh.C at line 159.

FOAM exiting
************************************************** ***********************************


Upon looking at the "/home/yoshiyagi/eddylicious/tutorials/channel_flow_lund_rescaling/precursor/system" folder, I indeed cannot find the file "blockMeshDict"



However, I do see a file named "blockMeshDict" in /home/yoshiyagi/eddylicious/tutorials/channel_flow_lund_rescaling/precursor/constant/polyMesh.

These are the files in the polyMesh folder:

blockMeshDict blockMeshDict.template channelMesh.py


I tried running "blockMesh" wtihin the above directory, but got another error:




// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time



--> FOAM FATAL ERROR:
cannot find file "/home/yoshiyagi/eddylicious/tutorials/channel_flow_lund_rescaling/precursor/constant/polyMesh/system/controlDict"

From function virtual Foam::autoPtr<Foam::ISstream> Foam::fileOperations::uncollatedFileOperation::rea dStream(Foam::regIOobject&, const Foam::fileName&, const Foam::word&, bool) const
in file global/fileOperations/uncollatedFileOperation/uncollatedFileOperation.C at line 539.

FOAM exiting
************************************************** ***************


I am at a loss in this tutorial as I think I have tried running blockMesh in other directories, but always get an error. Perhaps this issue is due to my inexperience with openFOAM and that I do not have the right environment or I am not calling blockMesh properly?



Any help would be greatly appreciated. I also wanted to add that I also tried running the above commands using "sudo."

***************UPDATE***************************** *
I got blockMesh to run, but I am not sure if what I did was the right thing to do. I noticed that my errors were related to the directory "system/blockMeshDict".


So, what I did was copy the "system" folder to within the "/home/yoshiyagi/eddylicious/tutorial/channel_flow_lund_rescaling/precursor/constant/polyMesh". I did this because the "controlDict" file was within the "system" folder, but the "system" folder was not located in the same directory as "blockMeshDict".



I also had to copy "blockMeshDict" into the copied "system" folder. This is what my directory and its contents looks like now:



************************************************** ***********
/home/yoshiyagi/eddylicious/tutorials/channel_flow_lund_rescaling/precursor/constant/polyMesh


This is where I ran blockMesh and it worked.






This is where I added the files blockMeshDict
/home/yoshiyagi/eddylicious/tutorials/channel_flow_lund_rescaling/precursor/constant/polyMesh/system

the contents are:

blockMeshDict decomposeParDict fvOptions fvSolution
controlDict decomposeParDict~ fvSchemes sampleDict



************************************************** *********************************


blockMesh now works, but could someone confirm if this was the right method to getting blockMesh to work?
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Old   November 2, 2022, 14:43
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Al Csc
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Yes, blockMeshDict used to be in constant/polyMesh (probably still in extend version). Now it is in system forlder
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Old   November 2, 2022, 18:11
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Yoshi Yagi
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Hi! Thanks for replying! I see, so the newer version of OpenFOAM is organized differently than older versions? The problem is that the tutorial was made with an older version of OpenFOAM then?
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Old   November 2, 2022, 23:49
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Older or different the link you posted is broken, so i have no detail. If it runs and you can validate the results, I won't bother if I were you.

Cheers!
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