[GAMBIT] One way valve geometry GAMBIT

ftimis · November 30, 2011, 08:42

Can anyone help me to design one way valve geometry in gambit? Actually I am currently studying an unsteady flow through a pipe (after water exits pump) and I want to see the effect of adding an one-way-valve (known also as check valve) into the pipe.

-mAx- · November 30, 2011, 08:46

Do you have a sketch of your valve?
Already built within CAD maybe?

ftimis · November 30, 2011, 08:49

Actually not. I am very new in CFD analysis and I don't know so many things. Do I have to make a CAD first and then try to design geometry in Gambit?

-mAx- · November 30, 2011, 08:53

not necessary.
Prior to CFD analysis, you need to built your geometry (cad package or gambit).
Once you know your design, I will help you

ftimis · November 30, 2011, 08:54

Ok max. I will provide you with my design as soon as I have it. Thank you!

ftimis · December 5, 2011, 09:23

Quote:

Originally Posted by -mAx-

not necessary.
Prior to CFD analysis, you need to built your geometry (cad package or gambit).
Once you know your design, I will help you

Hi max I am lost. I found some check valves design in youtube (links below). I can use either of them to make a start. I am currently working on the flow of the water in pipe (after exits water pump). I have already designed and analyzed an unsteady flow in a 2-d pipe and now I want to attach one-way-valve geometry in this pipe to see the difference in the flow of the water ( i am interested in the change of flow rate over time). Hope that I am clear and you can help me.

http://www.youtube.com/watch?v=aOOdW...eature=related
http://www.youtube.com/watch?v=qi7rh...B06A3A816195D1

ftimis · December 5, 2011, 10:34

http://www.youtube.com/watch?v=ehDd4...eature=related

Something like this I think is the easiest way. Can I create that in 2-d?

ftimis · December 5, 2011, 11:53

-mAx- · December 5, 2011, 12:01

static ou moving mesh?

ftimis · December 5, 2011, 12:04

Quote:

Originally Posted by -mAx-

static ou moving mesh?

what is the difference? (sorry for the idiot questions)

ftimis · December 5, 2011, 12:09

The straight pipe that I had design is created by 4 vertices ((0,0,0), (8,0,0), (0,0.05,0), (8,0.05,0)). I connected those vertices and created 4 edges. The boundary conditions are (velocity inlet, wall, pressure outlet and axis). Analyze in fluent 6.3 an axissymetric unsteady flow. Now I want to attach one-way-valve in this pipe to see the difference. Do I have to design a different pipe or just attach the valve in the existing one?

-mAx- · December 5, 2011, 12:10

the ball may rotate and it will open/close the valve.
Try first static mesh (one position (ball-angle))

ftimis · December 5, 2011, 12:17

Quote:

Originally Posted by -mAx-

the ball may rotate and it will open/close the valve.
Try first static mesh (one position (ball-angle))

Can this be done in 2-D?

-mAx- · December 5, 2011, 12:33

yes but not in 2d-axisymmetric

ftimis · December 5, 2011, 12:45

Quote:

Originally Posted by -mAx-

yes but not in 2d-axisymmetric

How should I proceed? Shall I just put a ball in the pipe and change the boundary conditions? Or I have to create a very different geometry?

-mAx- · December 5, 2011, 12:53

sketch first on paper, and post here

ftimis · December 5, 2011, 13:22

here is the sketch. I hope that is clear and I will be able to create one of these geometries.

-mAx- · December 6, 2011, 00:49

In fact I expected a sketch with dimensions

November 30, 2011, 08:42	One way valve geometry GAMBIT	#1
ftimis New Member Efthymios Efthymiou Join Date: Nov 2011 Posts: 16 Rep Power: 14	Can anyone help me to design one way valve geometry in gambit? Actually I am currently studying an unsteady flow through a pipe (after water exits pump) and I want to see the effect of adding an one-way-valve (known also as check valve) into the pipe.

November 30, 2011, 08:46		#2
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	Do you have a sketch of your valve? Already built within CAD maybe? __________________ In memory of my friend Hervé: CFD engineer & freerider

November 30, 2011, 08:53		#4
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	not necessary. Prior to CFD analysis, you need to built your geometry (cad package or gambit). Once you know your design, I will help you __________________ In memory of my friend Hervé: CFD engineer & freerider

December 5, 2011, 10:34		#7
ftimis New Member Efthymios Efthymiou Join Date: Nov 2011 Posts: 16 Rep Power: 14	http://www.youtube.com/watch?v=ehDd4...eature=related Something like this I think is the easiest way. Can I create that in 2-d? Last edited by ftimis; December 5, 2011 at 11:52.

December 5, 2011, 12:01		#9
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	static ou moving mesh? __________________ In memory of my friend Hervé: CFD engineer & freerider

November 30, 2011, 08:49		#3
ftimis New Member Efthymios Efthymiou Join Date: Nov 2011 Posts: 16 Rep Power: 14	Actually not. I am very new in CFD analysis and I don't know so many things. Do I have to make a CAD first and then try to design geometry in Gambit?

November 30, 2011, 08:54		#5
ftimis New Member Efthymios Efthymiou Join Date: Nov 2011 Posts: 16 Rep Power: 14	Ok max. I will provide you with my design as soon as I have it. Thank you!

December 5, 2011, 11:53		#8
ftimis New Member Efthymios Efthymiou Join Date: Nov 2011 Posts: 16 Rep Power: 14

December 5, 2011, 12:09		#11
ftimis New Member Efthymios Efthymiou Join Date: Nov 2011 Posts: 16 Rep Power: 14	The straight pipe that I had design is created by 4 vertices ((0,0,0), (8,0,0), (0,0.05,0), (8,0.05,0)). I connected those vertices and created 4 edges. The boundary conditions are (velocity inlet, wall, pressure outlet and axis). Analyze in fluent 6.3 an axissymetric unsteady flow. Now I want to attach one-way-valve in this pipe to see the difference. Do I have to design a different pipe or just attach the valve in the existing one?

December 5, 2011, 12:10		#12
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	the ball may rotate and it will open/close the valve. Try first static mesh (one position (ball-angle)) __________________ In memory of my friend Hervé: CFD engineer & freerider

December 5, 2011, 12:33		#14
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	yes but not in 2d-axisymmetric __________________ In memory of my friend Hervé: CFD engineer & freerider

December 5, 2011, 12:53		#16
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	sketch first on paper, and post here __________________ In memory of my friend Hervé: CFD engineer & freerider

December 6, 2011, 00:49		#18
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	In fact I expected a sketch with dimensions __________________ In memory of my friend Hervé: CFD engineer & freerider

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