How to simulate blowing out of a point

pizzaspinate · October 15, 2015, 09:29

Hi there,

I would like to blow out of a specific point in cfx. what is the best way to do this? I tried to declare a source point using "continuity". however when im doing so ansys wants me to add values for turbulent dissipation and turbulent kinetic energy.....I dont know where to get those values from or if there are values which i can assume.....has anyone here experience with that or any other idea how to blow from a point?
is there maybe a possibility to declare a point in the design modeler and declare it in the setup as an inlet or sth?

highorder_cfd · October 15, 2015, 10:14

Perhaps, if you do not need to input turbulent quantities you can just set them to zero (I am not completely sure about this approach).

Otherwise try to create a sub domain instead of a source point and (thus you need to create a body in the cad) in the table settings >Sources>Momentum Source/Porous Loss>General Momentum Source specify your x,y,y source terms for the momentum equations.

October 15, 2015, 09:29	How to simulate blowing out of a point	#1
pizzaspinate Member Join Date: Dec 2012 Posts: 81 Rep Power: 13	Hi there, I would like to blow out of a specific point in cfx. what is the best way to do this? I tried to declare a source point using "continuity". however when im doing so ansys wants me to add values for turbulent dissipation and turbulent kinetic energy.....I dont know where to get those values from or if there are values which i can assume.....has anyone here experience with that or any other idea how to blow from a point? is there maybe a possibility to declare a point in the design modeler and declare it in the setup as an inlet or sth?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
CFD-post: defining (or projecting) point on surface	bongbang	CFX	1	April 1, 2015 12:16
[Commercial meshers] Converting fluent mesh to foam	sivakumar	OpenFOAM Meshing & Mesh Conversion	11	April 30, 2013 09:29
[blockMesh] OpenFOAM blockMeshDict	sihaqqi	OpenFOAM Meshing & Mesh Conversion	2	February 1, 2013 03:49
Point of lift / drag in a 3D wing simulate.	SkunkWorks	OpenFOAM Post-Processing	0	April 23, 2010 17:18
CFX Post: Problems with moving point cloud for changing time steps	spatialtime	CFX	0	December 7, 2009 04:56

October 15, 2015, 10:14		#2
highorder_cfd Member Join Date: Jan 2015 Posts: 63 Rep Power: 11	Perhaps, if you do not need to input turbulent quantities you can just set them to zero (I am not completely sure about this approach). Otherwise try to create a sub domain instead of a source point and (thus you need to create a body in the cad) in the table settings >Sources>Momentum Source/Porous Loss>General Momentum Source specify your x,y,y source terms for the momentum equations.