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-   -   [GAMBIT] One way valve geometry GAMBIT (http://www.cfd-online.com/Forums/ansys-meshing/94932-one-way-valve-geometry-gambit.html)

ftimis November 30, 2011 09:42

One way valve geometry GAMBIT
 
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 09:46

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

ftimis November 30, 2011 09:49

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 09:53

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 09:54

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

ftimis December 5, 2011 10:23

Quote:

Originally Posted by -mAx- (Post 334127)
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 11:34

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 12:53

http://www.google.co.uk/imgres?q=che...1t:429,r:6,s:0

-mAx- December 5, 2011 13:01

static ou moving mesh?

ftimis December 5, 2011 13:04

Quote:

Originally Posted by -mAx- (Post 334723)
static ou moving mesh?

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

ftimis December 5, 2011 13:09

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 13:10

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

ftimis December 5, 2011 13:17

Quote:

Originally Posted by -mAx- (Post 334727)
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 13:33

yes but not in 2d-axisymmetric

ftimis December 5, 2011 13:45

Quote:

Originally Posted by -mAx- (Post 334729)
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 13:53

sketch first on paper, and post here

ftimis December 5, 2011 14:22

1 Attachment(s)
here is the sketch. I hope that is clear and I will be able to create one of these geometries.

-mAx- December 6, 2011 01:49

In fact I expected a sketch with dimensions ;)


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