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[mesh manipulation] How does fieldToCell work in TopoSet?

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Old   April 15, 2021, 23:41
Default How does fieldToCell work in TopoSet?
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Sunag R A
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Location: Bangalore, India
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Dear All,


I am working on chtMultiRegionSimpleFoam heat transfer problem. First, I have two regions. Out of which one region named gland is a surface where external temperature parameters are implemented. The temperature consists of zeros and variables. Say our of 1000 faces, 600 are zero temp and 400 are variable temperature.


Now, I need to change the BC of this 600 zero temperature. I am trying to use fieldToCell in TopoSet to get faces of these 600 zero temperature and convert into patch using splitMesh.


But, I am confused in using fieldToCell. I applied like below.


Quote:
{
name field1;
type cellSet;
action new;
source fieldToCell;
sourceInfo
{
field T;
min 0;
max 0;
}
}

But when I run topoSet, it shows as:


Cannot read field T from time 0
cellSet field1 now size 0


My question is.


1. Where does the toposet collects this fieldData so that it can create the CellSet.
2. I have a temperature file externally which 0 temp and variable temp. How to use this here?


Any leads will be appreciated.


Regards,
Sunag R A.
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createpatch, field, patch, splitmesh, toposet

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