How to output the drag force particle by particle?

MFiX
#1

Hello,

I am working on a 3-D modelling of a gas-solid system using CFD-DEM.

In the system, there are hundreds of particles generated with the file “particle_input.dat”.

The particles are not moving (fixed at the initial locations), as I turned off the update of particle positions.

I am wondering whether there is a way to output the drag force particle by particle?

Thanks,
Xiaoyang

#2

I have got a method, but I am not sure if it is the best choice, if anyone knows, please share and discuss.
The drag force is a local variable in MFIX.
1st, define a global variable
2nd, assign local variable to global variable
3rd,VTK output for user-defined variables of particles
Assign the drag force to the user-defined variable
4th, you can get the values in the vtk file

Another method,
You can just write it out if you are not intended to show the distribution of drag force
Write codes in the drag-force file and write it out by global id of particles

#3

the drag force is directly added to the FC （contact force） in the calc_gs01_dem. you need to state a new variable and store it. the variable should be whole level.