Womersley profile in CFX 11

hesamking · March 23, 2012, 13:11

i am doing a research on an aneurysm, I want to redo an
already done work to learn details of this work.
I don't know how I should set up the inlet velocity. I have the inlet velocity waveform graph from the paper, but I do not have any expression or equation which i can input into CFX. will you please guide me what I should do?
I am doing my study for an aneurysm at a bifurcation of a basilar artery. I have one inlet and two outlets? I also wanted to ask what B.C i should use for the outlet. In paper, I think it mentions Newmann B.C.
I have attached the picture of inflow waveform. I would really appreciate your kind help.
Regards,
Heasam

alinik · March 23, 2012, 13:23

The best BC for outlet is traction free kind of boundary condition. you can find many papers to find out more about this kind of BC. for inlet you can either use Pressure or womersley velocity profile which is hard to implement because cfx expressions can not recognize imaginery numbers.

hesamking · March 23, 2012, 14:35

Thanks alininik.
That's the problem, what would you do for the inlet BC so?
I should obey the inlet velocity waveform graph? I have the data for this graph but
the problem is defining a function which i can put in CFX?
Regards,
Hesam

hesamking · April 14, 2012, 16:26

can someone send me the setting for pulsatile blood flow simulation in ANSYS-CFX? This would be a great help to me.
Thanks

bipin2950 · January 4, 2019, 20:48

Has anybody used UDF for womersley flow as an inlet boundary condition in Ansys FLuent. IF then if can you share here.

ghorrocks · January 5, 2019, 05:28

If you want information for Fluent then try the Fluent forum.

April 14, 2012, 16:26	setting for blood simulation	#24
hesamking Member Hesam Moghaddam Join Date: Mar 2012 Posts: 49 Rep Power: 14	can someone send me the setting for pulsatile blood flow simulation in ANSYS-CFX? This would be a great help to me. Thanks

January 5, 2019, 05:28		#26
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	If you want information for Fluent then try the Fluent forum. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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March 23, 2012, 13:11		#21
hesamking Member Hesam Moghaddam Join Date: Mar 2012 Posts: 49 Rep Power: 14	i am doing a research on an aneurysm, I want to redo an already done work to learn details of this work. I don't know how I should set up the inlet velocity. I have the inlet velocity waveform graph from the paper, but I do not have any expression or equation which i can input into CFX. will you please guide me what I should do? I am doing my study for an aneurysm at a bifurcation of a basilar artery. I have one inlet and two outlets? I also wanted to ask what B.C i should use for the outlet. In paper, I think it mentions Newmann B.C. I have attached the picture of inflow waveform. I would really appreciate your kind help. Regards, Heasam

March 23, 2012, 13:23		#22
alinik Senior Member ali Join Date: Oct 2009 Posts: 318 Rep Power: 17	The best BC for outlet is traction free kind of boundary condition. you can find many papers to find out more about this kind of BC. for inlet you can either use Pressure or womersley velocity profile which is hard to implement because cfx expressions can not recognize imaginery numbers.

March 23, 2012, 14:35		#23
hesamking Member Hesam Moghaddam Join Date: Mar 2012 Posts: 49 Rep Power: 14	Thanks alininik. That's the problem, what would you do for the inlet BC so? I should obey the inlet velocity waveform graph? I have the data for this graph but the problem is defining a function which i can put in CFX? Regards, Hesam

January 4, 2019, 20:48		#25
bipin2950 New Member Bipin Tiwari Join Date: Dec 2018 Posts: 6 Rep Power: 7	Has anybody used UDF for womersley flow as an inlet boundary condition in Ansys FLuent. IF then if can you share here.