|March 12, 2012, 11:16||
Jet cross flow in a cylindrical mesh
Join Date: Aug 2010
Posts: 11Rep Power: 8
I have a finely meshed cylinder (good checkMesh). There is a jet flow of water entering the bottom of the cylinder and a cross flow of air from the sides of the cylinder. I had to split the two cylinder walls in two (for an inlet and outlet). The jet alone works, but when introducing the cross flow it crashes and U blows up in the solution but the residuals all look fine (1e-05 initial residual). But the adjustable time step causes the time step to go amazingly low. I can't find the right BC's for the inlet and outlet of the crossflow patches and have tried near everything. I think the problem is that the two patches are wrapped around the cylinder and meet on both ends, this must cause a problem when forcing certain BC's.
Any suggestions as to which BC's i should use on the two side patches (outer circumference split evenly in two) to have a 40 m/s cross flow.
|March 13, 2012, 03:03||
Join Date: Mar 2009
Location: NJ - Denmark
Posts: 477Rep Power: 16
Can you please post a sketch or the CAD-file or the case?
Also some info on the actual BC the output of the last iterations schemes and solver would help us to help you.
This will make it a lot easier to help as the description you give doesn't give a clear picture unless you work with cross-flow problems on a daily basis.
PS. I do not do personal support, so please post in the forums.
|Thread||Thread Starter||Forum||Replies||Last Post|
|Nu values come up too high for cylindrical pipe turbulent flow||Onur10||FLUENT||7||February 21, 2016 13:59|
|Trajectory of particles in a jet in cross flow||forgottenman||FLUENT||0||November 29, 2011 03:43|
|snappyHexMesh won't work - zeros everywhere!||sc298||OpenFOAM Native Meshers: snappyHexMesh and Others||2||March 27, 2011 21:11|
|LES of jet in cross flow||dirk||FLUENT||0||April 25, 2005 08:39|
|Mesh for 3 dim Geometry||Phil||FLUENT||9||July 12, 2000 04:39|