particle forces in lagrangian (intermediate) libraries
 

Hello everybody,

I'm really new with OpenFOAM. My work is related to the simulation of the motion of a cloud of particles. In the equation of motion for each particle, I would use the pressureGradient force. However, I obtain this error :
"Force pressureGradient must be specified as a dictionary"
Does it exist a tutorial using the pressureGradient force for the computation of the particle's motion ? Or someone knows how to use it, and what should be specify with this force ?
(Usually, only sphereDrag and gravity forces are used.)

I have an other question:
I saw that in the 1.7 version, there was the possibility to use the virtualMass force. Why it has not be kept for the 2.0 version ?

Thank you for your help.

Mat

For those who are interested, one should precise the velocity field used to calculate the pressure gradient force. For example, it could be done simply as following :

particleForces
{
sphereDrag;
gravity;
pressureGradient
{
U U;
}
}

Best,

Mat