[CFD-Lover]

Hello Foamers,

I am new to openfoam and need to do a lot of simulations for my master's project. I would like to simulate the flow over a c-d nozzle with a specified load at the throat. All I know so far is the amount of thrust required at a given speed. The problem is that I don't know how to specify the load or where to start. I have found some case examples comes with the poroussimpleFoam but no clue how to specify the load on the mesh as well as a value of thrust coefficient Ct=0.2. I am hoping that someone might have done something similar could find sometime to help in this subject. Any help would be really appreciate it.

Thanks in advance,

[CFD-Lover]

Any helps

[nimasam]

wrong approach
you are new to OpenFOAM, so try to spend time to learn general simulation stuff, such as:
1-mesh generation: you can use OpenFOAM mesh generator (blockMesh and snappyHexMesh) or you can import it from other mesh generator such as (gambit, salome, ICEM ,Ansys meshing and so on)

2-try to find your suitable solver. what kind of fluid you have? one phase or multiphase? newtonian or non-newtonian? heat transfer and combustion? compressible or incompressible? phase change? try to define what you are dealing with, so when you find the appropriate solver, you should study the existing tutorial and find how it works

3-now it is time to work on your test case

so i suggest to start with OpenFOAM user guide and read at least first chapter to find how to run and play existing test cases in OpenFOAM

[CFD-Lover]

Hello Nimasam,

Thank you for your reply. I will try to answer your questions point by point;

Originally Posted by nimasam

1-mesh generation: you can use OpenFOAM mesh generator (blockMesh and snappyHexMesh) or you can import it from other mesh generator such as (gambit, salome, ICEM ,Ansys meshing and so on)

Regarding mesh generation, I decided to use Gmsh and already created the mesh.

Originally Posted by nimasam

2-try to find your suitable solver. what kind of fluid you have? one phase or multiphase? newtonian or non-newtonian? heat transfer and combustion? compressible or incompressible? phase change? try to define what you are dealing with, so when you find the appropriate solver, you should study the existing tutorial and find how it works

I am using simpleFoam, which is for steady incomprehensible flow.

Originally Posted by nimasam

3-now it is time to work on your test case

so i suggest to start with OpenFOAM user guide and read at least first chapter to find how to run and play existing test cases in OpenFOAM

I finished reading about the solver and how to set boundary and initial conditions, so the case of the c-d nozzle is already working, however, to do porous jump, I believe that I should switch to poroussimpleFoam. So, this is where I got stuck. I need to specify a load at the throat of the c-d nozzle with different amount of thrust, but I don't know how to do that . Any suggestions?

Thanks in advance,

[nimasam]

honestly i don't understand what you want to accomplish However, in order to prepare porous zone, you need to define a cell zone using toposet or from importing grid, then introduce this cell zone to porousPropertiesDict

[CFD-Lover]

Would be possible to walk me through the process of setting the toposet if posted the grid?

Thanks in advance,

[sasa17]

Hi,
It's been a while but did you manage to do that ?
Thank you in advance.