[Gmsh] Ghost Cells

[Sudhi P V]

Hi,


I am using 'gmsh' to mesh and partition a domain in to number of parts for easier and faster analysis.

During this process, I encountered with some -ve partition IDs in the MSH file. Upon referring to gmsh documentation, it was found to be named as Ghost Cells.


I wanted to know the significance of these Ghost cells. Why are they called so ? and the use of representing them like this in any important calculations.


I am attaching a msh file for your reference. I have meshed a simple square in four partitions.




Regards,


Sudhi
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