[binnnnn]

I am writing my own solvers. I have encountered some probelms in parallel computation.

1. How to get global cell index in parallel computation?

2. How to convert between global cell index and local cell index?

3. When doing some computations in cells, should I use global cell index or local cell index?

Could someone give some advice? The available methods I found are outdated

[klausb]

1. How to get global cell index in parallel computation?
2. How to convert between global cell index and local cell index?

see:
https://www.openfoam.com/documentati...x.html#details

examples:

https://github.com/mattijsjanssens/m.../amgclSolver.C

Question about globalindex

3. When doing some computations in cells, should I use global cell index or local cell index?

In general OpenFOAM uses local indices, the global index may be required e.g. when linking OpenFOAM to external libraries.