Messages

16

Fluent / Re: Unsteady flow and DPM

« on: March 21, 2012, 05:02:12 AM »

It means if I solve the unsteady DPM, then Fluent will solve the NS eqns. at every time step and according to that it will go the the Lagrangian tracking. If this is true, then whether there is any need to solve first the transient flow and then switch on the unsteady DPM. Pl. reply and thanks in advance.

17

Fluent / Unsteady flow and DPM

« on: March 17, 2012, 10:46:10 AM »

I want to study the behavior of the particle under the unsteady flow. Consider a situation where the flow through a pipe in pulsatile in nature, say at the inlet to the pipe, the velocity is given as V=V_0*(1+sin(w*t)). If I solve the unsteady Fluent Solver, it will give the result, but what happens if I wants to solve the DPM along with this.
For, steady flow like V=V_0, first the eulerian flow field has to be solved, then we switch on  the DPM. Now, how to implement this in case of pulsatile problem.
Thanks in advance.

18

Fluent / Re: DPM in FLUENT

« on: March 14, 2012, 11:04:12 AM »

Thanks for the reply. But, that will give the position of one particle and I need to know the position of all the particles at a time and also to store all those, so that further calculation can be done.

19

Fluent / DPM in FLUENT

« on: March 14, 2012, 05:24:09 AM »

Hi,
I want to calculate the particle interaction force using DPM. For this force calculation I have to know the position of each and every particle at any particular step. Suppose I want to calculate the force on 'P' th particle, then that force is dependent on position of each particle, like
Force_on-Pth_part=Function(Position-part1+Position-part-2+.....+Position-part-N), where we assume that there are 'N' no of particles are injected.
The entire calculation has to be repeated for each particle that are being tracked.
Please help me in this regard.