Gap

Averome · August 12, 2017, 11:28

Hello everybody. I want to calculate the flow of air through the gap. Air enters the gap at a pressure of 4.7 MPa, within the gap pressure 1.47 MPa. Weight consumption 8 kg / s.
I collide with the fact that I can not get the pressure at the output of 1.47 MPa. What can I do wrong? How to be when solving such problems? The disk is solved by a sector of 90 degrees. In the initial conditions I set the pressure at the inlet of 4.7 MPa, the temperature of 200 k at the outlet is the static pressure 1.47 MPa
I carry out a calculation check on the density of the medium, but here the variable pressure is the channels in which the velocity increases. Thank you

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Averome · August 12, 2017, 12:27

IMG_20170812_193210.jpg

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Averome · August 14, 2017, 02:04

IMG_20170814_090804.jpg

Initial conditions .: 101325 pa, 200k. Input 8kg / s, thermodynamic parameters at the inlet 4.7 MPa temperature 200k. Output: static pressure 1.47 MPa, temperature 200k. Correct me if I do not specify parameters. Thank you

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Averome · August 14, 2017, 02:19

IMG_20170814_092537.jpg

Picture solver

Boris_M · August 16, 2017, 09:33

I have no idea what you are trying to solve, where the inlet boundary condition is defined and where the outlet boundary condition.
I also did not understand what your problem is. I'm sorry.
If you are using FloEFD I would recommend contacting support and someone can help you directly. If you use SWFS, then please contact also your local support team.

Regards,
Boris

Averome · August 16, 2017, 13:01

Quote:

Originally Posted by Boris_M

I have no idea what you are trying to solve, where the inlet boundary condition is defined and where the outlet boundary condition.
I also did not understand what your problem is. I'm sorry.
If you are using FloEFD I would recommend contacting support and someone can help you directly. If you use SWFS, then please contact also your local support team.

Regards,
Boris

Hello, Boris! thanks for the answer. I try to blow air into the gap between the disc and the lid, not even this is the most important question, my question is how to be when the air enters, say in an elongated cylinder from the end, at a pressure of 4,7 MPa, and at the output the boundary condition is the static pressure of 1, 47 MPa, what should the initial conditions be in this case?
Thanks you

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Averome · August 17, 2017, 09:58

I write on which option stopped at the choice of the initial conditions. Initial pressure 4.7 MPa temperature 200k. Thermodynamic parameters at the inlet pressure 4.7 MPa, temperature 200, mass flow 8 kg / s. The boundary condition at the outlet is a static pressure of 1.47 MPa. The calculation turned out to be physically correct. thanks to all

August 12, 2017, 11:28	Gap	#1
Averome New Member Join Date: Jul 2017 Posts: 18 Rep Power: 9	Hello everybody. I want to calculate the flow of air through the gap. Air enters the gap at a pressure of 4.7 MPa, within the gap pressure 1.47 MPa. Weight consumption 8 kg / s. I collide with the fact that I can not get the pressure at the output of 1.47 MPa. What can I do wrong? How to be when solving such problems? The disk is solved by a sector of 90 degrees. In the initial conditions I set the pressure at the inlet of 4.7 MPa, the temperature of 200 k at the outlet is the static pressure 1.47 MPa I carry out a calculation check on the density of the medium, but here the variable pressure is the channels in which the velocity increases. Thank you Sent from my MI 4W using CFD Online Forum mobile app Last edited by Averome; August 14, 2017 at 01:40. Reason: Уточняю исходные данные

August 14, 2017, 02:19		#4
Averome New Member Join Date: Jul 2017 Posts: 18 Rep Power: 9	IMG_20170814_092537.jpg Picture solver Last edited by Averome; August 14, 2017 at 03:39.

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August 12, 2017, 12:27		#2
Averome New Member Join Date: Jul 2017 Posts: 18 Rep Power: 9	IMG_20170812_193210.jpg Sent from my MI 4W using CFD Online Forum mobile app

August 14, 2017, 02:04		#3
Averome New Member Join Date: Jul 2017 Posts: 18 Rep Power: 9	IMG_20170814_090804.jpg Initial conditions .: 101325 pa, 200k. Input 8kg / s, thermodynamic parameters at the inlet 4.7 MPa temperature 200k. Output: static pressure 1.47 MPa, temperature 200k. Correct me if I do not specify parameters. Thank you Sent from my MI 4W using CFD Online Forum mobile app

August 16, 2017, 09:33		#5
Boris_M Disabled Join Date: Jul 2009 Posts: 616 Rep Power: 24	I have no idea what you are trying to solve, where the inlet boundary condition is defined and where the outlet boundary condition. I also did not understand what your problem is. I'm sorry. If you are using FloEFD I would recommend contacting support and someone can help you directly. If you use SWFS, then please contact also your local support team. Regards, Boris

August 17, 2017, 09:58		#7
Averome New Member Join Date: Jul 2017 Posts: 18 Rep Power: 9	I write on which option stopped at the choice of the initial conditions. Initial pressure 4.7 MPa temperature 200k. Thermodynamic parameters at the inlet pressure 4.7 MPa, temperature 200, mass flow 8 kg / s. The boundary condition at the outlet is a static pressure of 1.47 MPa. The calculation turned out to be physically correct. thanks to all