[GAMBIT] Specifiy boundary type

robinsaikkara · March 5, 2012, 11:18

Hi, I made a model of a centrifugal pump, but what boundary types do i have to specify for the pump? So what should i do?

Far · March 5, 2012, 11:28

post few pics. Generally boundary conditions are

1. Inlet : Pressure inlet >>>>>>> specify total pressure and flow angles.
2. Outlet : Pressure Out >>>>>> Specify the static pressure required to produce the mass flow rate.
3. Blade and hub: no slip condition wall
4. Casing . Zero Velocity in absolute reference frame.
5. Periodic boundary : If modeled one or two passages.

robinsaikkara · March 5, 2012, 12:07

The impeller speed is 1300 rpm, how it specifiy?

Far · March 5, 2012, 12:11

cell zone condition >>>>>> Fluid >>>>>>>> provide rpm there with axis of rotation.

robinsaikkara · March 5, 2012, 12:38

Okay, thank you for the answer.

March 5, 2012, 11:18	Specifiy boundary type	#1
robinsaikkara New Member Robins A G Join Date: Jan 2012 Posts: 4 Rep Power: 14	Hi, I made a model of a centrifugal pump, but what boundary types do i have to specify for the pump? So what should i do?

March 5, 2012, 11:28		#2
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	post few pics. Generally boundary conditions are 1. Inlet : Pressure inlet >>>>>>> specify total pressure and flow angles. 2. Outlet : Pressure Out >>>>>> Specify the static pressure required to produce the mass flow rate. 3. Blade and hub: no slip condition wall 4. Casing . Zero Velocity in absolute reference frame. 5. Periodic boundary : If modeled one or two passages. robinsaikkara likes this.

March 5, 2012, 12:07	Impeller speed	#3
robinsaikkara New Member Robins A G Join Date: Jan 2012 Posts: 4 Rep Power: 14	The impeller speed is 1300 rpm, how it specifiy?

March 5, 2012, 12:11		#4
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	cell zone condition >>>>>> Fluid >>>>>>>> provide rpm there with axis of rotation. robinsaikkara likes this.

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March 5, 2012, 12:38		#5
robinsaikkara New Member Robins A G Join Date: Jan 2012 Posts: 4 Rep Power: 14	Okay, thank you for the answer.