[alainislas]

Hello

My simulation consists of 2 stages:

1) An injection of coal particles via an air blast from a pressurized container to a vacuumed sphere chamber.

2) A dust explosion after injection is finished and the entrance of the sphere is sealed.

I created my mesh in ICEM by defining 3 cellZones and 2 faceZones to delimit my regions of interest (see pic.) These are recognized by OpenFoam accordingly.

I am already done with step 1), but now I want to get rid of the CellZones 2&3 as they are no longer required for my simulation. Does anyone know how to tell OpenFoam to don't calculate in these cells?
I know that in Fluent one can deactivate cellZones and continue the calculation of the simulation. This closes the domain by introducing a wall.

I want to do exactly the same in OpenFoam (delete cellZones 2&3 and convert faceZone1 into a wall). Does anyone know how to do this?

[clapointe]

My first thought is mapping to a mesh that only consists of zone 1 using mapFields. I think I remember seeing some similar functionality to limit combustion to a single zone, but I don't know offhand how to do it for everything -- perhaps someone can jump in here. There should be an example of mapFields in the cavity icoFoam tutorial -- at least for the later versions of openfoam.

Caelan

[HPE]

I am sure I didn't understand the problem (so my apologies), but deleting the files associated with cellZones/faceZones should be enough to remove these from your simulation (or am I too naive)?

[alainislas]

Thank you both for your valuable answers. What I ended doing was to create a new mesh without the undesired cellZones and then to map the fields of my last saved time.
In my case, although all mapMethods did the job, the 'mapNearest' and 'interpolate' methods gave me some numerical instabilities once I ran stage 2) of my simulation. Up to now the 'cellPointInterpolate' seems more stable in my case. (I'm using OF8)