Hi~ i have a question for drag force.
nowdays, i study a simulation flow about liggghts, especially, coupling with openfoam.
i want to find how to affect flow( liquid or gas) to particle. so, i look at files for coupling(fix_cfd_coupling.cpp, fix_cfd_coupling_force.cpp and so on)
I found a drag force add to orient force(f[]) in function post_force(int).
but i could not find how to calculate dragforce( fix_dragforce_->array_atom).
Where is this force calculated?
thx for read my question, with my odd(?) english.
alice | Wed, 06/01/2016 - 15:55
Hi SongDaZ,
Hi SongDaZ,
the calculation of the drag forces (and others) is carried out by the force models (CFDEMcoupling/src/lagrangian/cfdemParticles/subModels/forceModel). Have a look at the *.C-files of the respective model.
Best regards,
Alice
Safaei | Fri, 01/10/2020 - 13:50
calculation of drag force instead of modelling
Hi Alice,
for a single particle immersed in a fluid how can we calculate the drag force by integrating the pressure distribution (resolved particle) over the particle? (not modelling the forces using coefficients). I think that it must be a postprocessing task. Is there a better idea?