[analoq]

Hi everyone,

I am still new and learning CFD, but I was wondering what should I pay attention to when simulating an incompressible laminar flow in a short rectangular pipe. The length of the pipe would likely be the same with the width of the cross-sectional inlet, hence the top view would be a square. The fluid would be driven only by the pressure gradient between the inlet and outlet. I'm planning to use the pimpleFoam solver, which solver would you recommend for p? Thank you so much for your help.

[ARTisticCFD]

Originally Posted by analoq

Hi everyone,

I am still new and learning CFD, but I was wondering what should I pay attention to when simulating an incompressible laminar flow in a short rectangular pipe. The length of the pipe would likely be the same with the width of the cross-sectional inlet, hence the top view would be a square. The fluid would be driven only by the pressure gradient between the inlet and outlet. I'm planning to use the pimpleFoam solver, which solver would you recommend for p? Thank you so much for your help.

Hii,

I am just interested to know why you want to do such a simulation? Is there a particular reason why you want to simulate on a short pipe and not a long one?

[analoq]

Originally Posted by ARTisticCFD

Hii,

I am just interested to know why you want to do such a simulation? Is there a particular reason why you want to simulate on a short pipe and not a long one?

Thank you for your comment. Think back on this, I should model a longer pipe for stability and faster convergence. My original model is short because I was going to couple openFoam with a Discrete Element Method engine to simulate particle motion in fluid, the distribution of the particles are in a square.

My question is, as solid particles are placed in the fluid cells, would icoFoam or pimpleFoam perform better to achieve steady-state for incompressible laminar flow?

[ARTisticCFD]

Originally Posted by analoq

My question is, as solid particles are placed in the fluid cells, would icoFoam or pimpleFoam perform better to achieve steady-state for incompressible laminar flow?

There might be differences in performance and convergence time, but since your problem is pretty standard I think both will have equivalent performances. Also, icoFoam and pimpleFoam are used to simulate transient flows. Is there any particular reason you chose these solvers? I think, the most common solver for this application would be simpleFoam. It is a steady-state solver that can solve laminar or turbulent (RANS) cases.


Also, any particular reason to include particles in the simulation? By what I understand (which might be wrong), you want to include kinematic particle clouds in the solver? Similar to icoLagrangianFoam. Am I right?