lagrangian particle properties

Submitted by kalei on Thu, 05/12/2016 - 10:48

I have a general question concerning the accessible properties of the lagrangian particle cloud in CFDEMCoupling.

Looking at the packedBedTemp Tutorial of the cfdemSolverPisoScalar in the lagrangian particle Cloud of the CFD results I can only access the particle properties r and v. However, the DEM results contain a lot of more information about the particle properties, e.g. Temp, ...

In my result representation I want to visualize e.g. CFD flow velocity and DEM particle temperature in parallel. Can anybody give me a hint, where the properties that are accessible for the lagrangian particles in the CFD results are defined and how I can extend those for e.g. temperature?

Daniel Queteschiner | Thu, 05/19/2016 - 15:17

The reason for the limited amount of properties available for the CFDEMcoupling output is the fact that these need to be communicated between LIGGGHTS and CFDEMcoupling which creates some overhead. Thus you want to restrict communication to only those properties that are relevant to the CFD solver. In CFDEMcoupling they are stored in the cfdemCloud (or any derived) class.
To some extent you can control the particle output via the IOModel specified in the couplingProperties file.
Anyway, in a coupled simulation you can still use LIGGGHTS to dump the particle properties and load them into paraview in addition to the fluid data. You just have to make sure that the dump frequency is consistent.

kalei | Thu, 05/19/2016 - 16:58

You are right. Originally I had the problem of different times of CFD and DEM data. But this can be solved by the temporalShiftScale Filter of paraview.