|
[Sponsors] |
March 7, 2019, 14:21 |
Time step in DPM steady tracking
|
#1 |
Member
Liliana de Luca Xavier Augusto
Join Date: Feb 2013
Posts: 64
Rep Power: 13 |
Hello all.
I have a simulation with the following characteristics: Two concentric cylinders where the flow of a non newtonian fluid occurs in the annular region. The inner cylinder is swirling at 200 rpm. The outer cylinder is stationary. I would like to track a particle inside the annular region using DPM. The flow can be considered as unchanged during the particle track. So I am using the steady tracking for DPM particles. Basically, the particle also swirls with the fluid. However, I am having some issues by defining the time step parameters for the steady tracking (maximum number of step and length scale). How would be the right way to choose these values? Is there any kind of test (like a grid independence test) to define the time step by decreasing the value of the length scale (but keeping the max. number of steps) until the solution is unchanged? Is this correct to do? I have observed that by changing these parameters, the solution also changes. Thanks! |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Extrusion with OpenFoam problem No. Iterations 0 | Lord Kelvin | OpenFOAM Running, Solving & CFD | 8 | March 28, 2016 11:08 |
AMI interDyMFoam for mixer nu problem | danny123 | OpenFOAM Programming & Development | 8 | September 6, 2013 02:34 |
How to write k and epsilon before the abnormal end | xiuying | OpenFOAM Running, Solving & CFD | 8 | August 27, 2013 15:33 |
dynamic Mesh is faster than MRF???? | sharonyue | OpenFOAM Running, Solving & CFD | 14 | August 26, 2013 07:47 |
same geometry,structured and unstructured mesh,different behaviour. | sharonyue | OpenFOAM Running, Solving & CFD | 13 | January 2, 2013 22:40 |