Question #669519 on Yade changed:
https://answers.launchpad.net/yade/+question/669519
Status: Open => Answered
Raphaël Maurin proposed the following answer:
Dear Francesco,
As you noticed, dragEngine only applies a drag force to the particles
considering the fluid at rest. There exists another engine which can
apply drag forces to the particles considering a 1D vertical fluid
velocity profile, which is called HydroForceEngine (see the manual
https://yade-
dem.org/doc/yade.wrapper.html?highlight=hydroforceengine#yade.wrapper.HydroForceEngine
and an example script
trunk/examples/HydroForceEngine/oneWayCoupling/sedimentTransportExample.py).
However, if you want to apply a drag force due to a 3D velocity field,
you will need to implement something else.
Don't hesitate to ask further questions on HydroForceEngine if you want
to use it.
Best,
Raphael
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