CFD analysis on regenerative pump using ANSYS CFXs

Rakeshvb · July 14, 2014, 08:10

Dear friends, I am conducting a CFD analysis on regenerative pump using ANSYS CFX (MRF approach). Please see the model attached. http://s9.postimg.org/cugg0fogv/image.jpg
The model consists of 3 regions- inlet domain ,impeller domain and outlet domain.
Impeller is rotating at 2800 rpm. At inlet , total pressure =101953pa and at outlet, mass flow rate =0.76kg/s .
The pump is expected to produce 25 m head.But from analysis it is found that ,pressure at the outlet of the pump is negative.
See the pressure distribution> http://postimg.org/image/7t53erj3j/
Can anyone help me with this problem...
Thanks in advance..

ghorrocks · July 14, 2014, 18:12

FAQ: http://www.cfd-online.com/Wiki/Ansys..._inaccurate.3F

roksonkmathew · April 6, 2016, 01:59

Hi Rakesh!

I am facing the same issue. Was it resolved in your case? if yes, then please do help.

turbo · April 6, 2016, 12:17

You will need to show details of cfd domain geometry, boundary conditions and interface modelings.

July 14, 2014, 08:10	CFD analysis on regenerative pump using ANSYS CFXs	#1
Rakeshvb New Member Join Date: Nov 2013 Posts: 3 Rep Power: 12	Dear friends, I am conducting a CFD analysis on regenerative pump using ANSYS CFX (MRF approach). Please see the model attached. http://s9.postimg.org/cugg0fogv/image.jpg The model consists of 3 regions- inlet domain ,impeller domain and outlet domain. Impeller is rotating at 2800 rpm. At inlet , total pressure =101953pa and at outlet, mass flow rate =0.76kg/s . The pump is expected to produce 25 m head.But from analysis it is found that ,pressure at the outlet of the pump is negative. See the pressure distribution> http://postimg.org/image/7t53erj3j/ Can anyone help me with this problem... Thanks in advance..

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July 14, 2014, 18:12		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	FAQ: http://www.cfd-online.com/Wiki/Ansys..._inaccurate.3F

April 6, 2016, 01:59		#3
roksonkmathew New Member Rokson K Mathew Join Date: Feb 2016 Posts: 9 Rep Power: 10	Hi Rakesh! I am facing the same issue. Was it resolved in your case? if yes, then please do help.

April 6, 2016, 12:17		#4
turbo Senior Member Join Date: Jun 2009 Posts: 174 Rep Power: 16	You will need to show details of cfd domain geometry, boundary conditions and interface modelings.