CFDEM®coupling - User Forum

Hello
I installed OF 2.2.1 , liggghts-3.0.3 and cfdem-2.7.1 on ubuntu 12.04.
I wrote the new solver (coupling interFoam and liggghts) and compiled it successfully. But below error appeared after runnig my simulation!
-------------------------------------------------------------------------------------------------------------------------
Starting time loop
Courant Number mean: 3.45051e+21 max: 1.54493e+25
Interface Courant Number mean: 0 max: 0
deltaT = 1.16099e-41
--> FOAM Warning :
From function Time::operator++()

Dear all,

I have installed cfdem soupling before successfully, I tried to install it on my new computer but the following error occurs when I tried to compile cfdemsolverIB by "wmake"

error:
cfdemSolverIB.C:44:26: fatal error: cfdemCloudIB.H: No such file or directory
#include "cfdemCloudIB.H"

here I copy the error completely:

Hey! I'm asked to compute the pressure coefficient distributions ܿfor the upper and lower surfaces of a NACA0012 airfoil based on the experimental data provided, which is the one I'm attaching in the image. Then, I have to calculate the lift coefficient distributions ܿand the airfoil global lift coefficient.

Hi, I have a question about the inter-particle forces. Can I define an attraction force among particles? These particles will not contact with each other, but they can still subjected to this kind of force?

Hi,
I am completely new in CFDEM. I have previously developed and coupled a CFD and a DEM model to simulate the scouring in front of breakwaters. Now I want to use CFDEM for this purpose because my model had some limitations. I wonder is there anyone here used CFDEM for sediment transport or scouring simulation? I appreciate if anyone could tell me where to begin.

I'm testing on the settlement of a single sphere using cfdemSolverPiso. The terminal velocity predicted by analytical model should be about 0.04 m/s. However, I got a velocity more than 0.1 m/s. I don't know what's wrong with my settings. Coud you please help me? I've attached my files in this post.

The voidfractionModel is bigParticle. The diameter and density of the sphere is 15 mm and 1120 Kg/m^3. The density and dynamic viscosity of the fluid is 970 Kg/m^3 and 373e-3 Ns/m^3.

Hello everybody,

I need to know how I can modify the fluid properties in an CFDEM simulation. I changed viscosity and density but after running the simulations I have got the same answer in different fluids with the same granular material.

Regards,

Carlos

Hello All,

Hello everybody
I tried to insert the particles for the creation of the flat bed with the commands as create_atoms or insert/pack but did not succeed!
The created particles do not neighbour enough and the number of those do'nt enough.

Please help me.
Thanks
Elham

Following the tutorial example, but the pressure drop didn't increase/decrease significantly (only 1 unit or less ) with the increase/decrease inlet velocity (0.01/0.1m/s). I know that the pressure is divided by rho, with a unit of m2/s2.
Could anyone give me idea why this happens?