|May 25, 2013, 07:22||
Surface normal velocity BC with zero gradient tangential, cylinder
Join Date: Jul 2012
Posts: 30Rep Power: 5
I have a cylindrical flow in which I am specifying the velocity at the cylinder surface (flowing inwards) and having the top of the cylinder as a fixed pressure outlet. I would like
to create a boundary condition where only the surface normal velocity (ie; radial component) is specified, and there is a zero gradient condition in the tangential directions.
Currently I'm using the cylindricalvelocityinlet condition from the following thread:
which works perfectly except for the shear it applies to the flow as it moves tangentially against the boundary. Basically I want a flow where no vorticity is generated (except along the bottom boundary), which is not what I am currently getting. Below I've attached a plot of the vorticity in the out of page direction, showing the effect of the shear on the flow.
I don't have a good enough understanding of the BC codes to create my own, and I'm not sure how I would create such a condition in groovyBC. Any help?
|cylinder, cylindrical, surface normal, velocity bc|
|Thread||Thread Starter||Forum||Replies||Last Post|
|ActuatorDiskExplicitForce in OF2.1. Help||be_inspired||OpenFOAM Programming & Development||8||July 3, 2014 10:54|
|Surface normal gradient on unstructured mesh||fumiya||OpenFOAM||1||September 30, 2011 04:34|
|Surface tangential gradient||nzy102||OpenFOAM Post-Processing||1||October 15, 2008 02:22|
|NACA0012 geometry/design software needed||Franny||Main CFD Forum||13||July 7, 2007 15:57|
|velocity normal to the surface||srinivas||CD-adapco||1||May 30, 2007 02:03|