Ejector troubles
Posted: Sun Apr 14, 2019 12:14 am
Hello honorable users of Code Saturne.
I am trying to model a air/air ejector at RT but I am facing instabilities.
I use tretrahedal mesh (Salomé) have one 3mm nozzle as inlet with 100 m/s, one suction inlet with 1 m/s and one outlet. All other boundaries are smooth walls.
After some iterations/time steps the system gets unstable and at some point the solutions ceases to converge. This behaviour is for steady/unsteady approach as well as for various turbulence models.
So either the model is bad. One concern I have is that the simulation needs to be done in the compressible module (which I still do not master) or something else is wrong.
The development/decline of pressure and velocity is illustrated by short video sequences to be found in this folder: https://my.pcloud.com/publink/show?code ... EiIHsxovjy (hope it works) as well as the mesh and xml file.
Any input will be appreciated. Thanks.
I am trying to model a air/air ejector at RT but I am facing instabilities.
I use tretrahedal mesh (Salomé) have one 3mm nozzle as inlet with 100 m/s, one suction inlet with 1 m/s and one outlet. All other boundaries are smooth walls.
After some iterations/time steps the system gets unstable and at some point the solutions ceases to converge. This behaviour is for steady/unsteady approach as well as for various turbulence models.
So either the model is bad. One concern I have is that the simulation needs to be done in the compressible module (which I still do not master) or something else is wrong.
The development/decline of pressure and velocity is illustrated by short video sequences to be found in this folder: https://my.pcloud.com/publink/show?code ... EiIHsxovjy (hope it works) as well as the mesh and xml file.
Any input will be appreciated. Thanks.