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January 22, 2012, 15:47 |
How to make this draw in 3D
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#1 |
Senior Member
Khalid Baker
Join Date: Mar 2009
Location: IRAQ
Posts: 168
Rep Power: 17 |
I want to draw 3D pipe inlet as 2 inlets one for Air and the other for Water as shown in picture may somebody tell me to how i can draw it and use it in CFX?
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January 22, 2012, 17:51 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
This is trivial to draw in any solid modelling package or DesignModeller. If you cannot work out how then do some tutorials on your solid modellign package of choice.
If this is a multiphase simulation why can't you use a single inlet and use the volume fraction to define the air and water sections? |
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January 23, 2012, 05:39 |
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#3 |
Senior Member
Khalid Baker
Join Date: Mar 2009
Location: IRAQ
Posts: 168
Rep Power: 17 |
Hi thanks for the reply If I use single inlet how I can define the shape of the interface as you see from the pict my interface is concave not flat ? I think your idea is right with flat interface not concave? also i am new with CFX?
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January 23, 2012, 05:47 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
You have to define a CEL expression which evaluates to 0 in the air region and 1 in the water region (for the water VF). In this case the interface looks circular so an equation which gives the distance from the centre point should do the trick, as you use an if statement to assess whether it is inside or outside your defined arc.
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January 23, 2012, 14:37 |
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#5 |
Senior Member
Khalid Baker
Join Date: Mar 2009
Location: IRAQ
Posts: 168
Rep Power: 17 |
Thanks for the reply as I told you I am new with CFX what you mean with CEL expression? what you advice me to read to start simulation my case with CFX?
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January 23, 2012, 16:36 |
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#6 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
CEL is the CFX expression language. You can see how it works in the tutorials as many of them use CEL functions.
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January 25, 2012, 02:42 |
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#7 |
Senior Member
Khalid Baker
Join Date: Mar 2009
Location: IRAQ
Posts: 168
Rep Power: 17 |
may you sent me a web site for all CFX tutorials or sent it via my email below I am actually not have anyone.
khalidb77@gmail.com |
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January 25, 2012, 02:59 |
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#8 | |
Senior Member
Lance
Join Date: Mar 2009
Posts: 669
Rep Power: 22 |
Quote:
There's also a couple of examples on the ansys customer portal, have a look there. |
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January 25, 2012, 14:13 |
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#9 |
Senior Member
Khalid Baker
Join Date: Mar 2009
Location: IRAQ
Posts: 168
Rep Power: 17 |
I found the cfx_tutr.pdf file but I not have any of mesh files, ccl files and out files and I do not have access for ansys customer portal I am so thankful if you kindly send me the related files for Tutorial (9) : Free surface flow over a Bump into my email.
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January 25, 2012, 14:17 |
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#10 |
Senior Member
Lance
Join Date: Mar 2009
Posts: 669
Rep Power: 22 |
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January 29, 2012, 06:19 |
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#11 | |
Senior Member
Khalid Baker
Join Date: Mar 2009
Location: IRAQ
Posts: 168
Rep Power: 17 |
Dear ghorrocks I read and run the Free surface flow over a Bump tutorial available in examples folder its a good example in free surface flow If you remember for the pict i sent in my first post you told me that I need to define a CEL expression for vof for water to evaluate the shape of interface ? the problem I do not have equation define it only I have it's distance from the bottom of pipe so how i can define the convex interface in this case? any suggestions pls?
kbaker Quote:
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January 29, 2012, 17:42 |
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#12 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
To do this in a CEL expression you need to define an expression which describes the shape of the interface. This looks like a circle so that should not be too hard. Then you simply do a check (with step or if) whether the point is inside or outside the circle, and define the volume fraction.
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