The gravity and Buoyancy forces are automatically accounted for in the Ansys Fluent MPM model.
Other particle-particle field forces, such as electrostatic, magnetic or cohesive forces, are implemented in the MPM using a potential force model in which inter-particle field forces acting on the particle are defined as:
(13–9) |
where, | |
| |
| |
|
The model constants ,
,
, and
can be indirectly related to the tensile strength or cohesive forces
in solids.
In a similar manner, particle-wall field forces are defined as:
(13–10) |
where, | |
| |
|
The signs of the constants and
determine whether the particle-particle and particle-wall field
forces are attraction or repulsion forces.