In the couplingProperties file, I did not choose any drag force models, but when I run the simulation and use the LIGGGHTS
input script to dump the drag force, found the drag force is not equal 0.
ITEM: ATOMS id type type x y z vx vy vz fx fy fz f_dragforce[1] f_dragforce[2] f_dragforce[3] radius
7 1 1 -0.0216861 0.00701888 0.121726 -0.182003 -1.6254e-05 -0.138673 -1.09774e-09 -1.73885e-10 -4.1285e-07 -1.09774e-09 -1.73885e-10 -1.01485e-08 0.002
6 1 1 -0.0206948 0.0458782 0.123112 -0.18201 -2.80257e-06 -0.138674 -1.24525e-09 3.18963e-11 -4.13118e-07 -1.24525e-09 3.18963e-11 -1.04157e-08 0.002
It's all right?