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Parabolic inlet velocity profile

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Old   August 8, 2010, 06:29
Default Parabolic inlet velocity profile
  #141
ata
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Hi
I think you can use groovy boundary condition and transform cylindrical cordinate to cartesian.
Good luck

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Old   August 9, 2010, 06:08
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Quote:
Originally Posted by pradeeppandeygbpec View Post
hello...all..
i need to prescribe parabolic velocity profile at inlet to a 3-D circular pipe . The pipe is along the x-Axis...ie. x-axis as its centerline.
I know the parabolic velocity profile for cylindrical coordinates system but how to implement the same in Cartesian coordinates....i need "u" as a function of x,y,z at inlet.
plz help me out...
Hi There,

i postet a while ago(further up somewhere) a "tool" that should be able to do that.
Just download and insert your equation...hope it works..

regards
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Old   January 21, 2011, 15:08
Default setParabolicInlet.C
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Hi. Does anyone have setParabolicInlet.C file previously posted? It is not available any more. If anyone can email it to gascortado@gmail.com I will greately appreciate it. Thanks
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Old   January 22, 2011, 15:01
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Hi

You would be better off considering the tool swak4foam: http://openfoamwiki.net/index.php/Contrib/swak4Foam

Have a nice weekend,

Niels
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Old   May 2, 2011, 04:44
Default information in parabolic inlet
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Good morning evryone!
I 'm new in OpenFoam ,i want set parabolic inlet.I use the version 1.7.0. my geometry is a canal with attach in a tab.I have read in forom but i don't understand.
Please some help me to explain the procedure.
I try to english but my language is french.
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Old   August 25, 2011, 15:38
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Hi all, can every one tell me how to define U0=1-exp(-y^2) profile at the inlet BCs?


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Old   August 25, 2011, 17:31
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Quote:
Originally Posted by desert_1250 View Post
Hi all, can every one tell me how to define U0=1-exp(-y^2) profile at the inlet BCs?
If you like C++-programming you can do it with codedFixedValue (only in 2.0). There was a discussion on that in the forum today

Or you can do it with groovyBC (now part of the swak4Foam-package). You find info about that either inthe Forum or on the Wiki
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Old   August 26, 2011, 02:09
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Quote:
Originally Posted by gschaider View Post
If you like C++-programming you can do it with codedFixedValue (only in 2.0). There was a discussion on that in the forum today

Or you can do it with groovyBC (now part of the swak4Foam-package). You find info about that either inthe Forum or on the Wiki

tanx for your reply, i have not any information about swak4Foam and not have enough time to study it, would you tell me the simplest way to set this BCs at the inlet? (i used OF.1.5-dev)

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Old   August 26, 2011, 04:24
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Quote:
Originally Posted by desert_1250 View Post
tanx for your reply, i have not any information about swak4Foam and not have enough time to study it, would you tell me the simplest way to set this BCs at the inlet? (i used OF.1.5-dev)

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Unless you know the OpenFOAM-API by heart and program two boundary conditions every day (before breakfast) in my opinion groovyBC is the fastest way to get what you want (BTW: for your OF version you'll have to use "old school" groovyBC. Advantage: compilation is faster)

As you're very short on time: http://tinyurl.com/3fklrwd
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Old   August 26, 2011, 12:20
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Quote:
Originally Posted by gschaider View Post
Unless you know the OpenFOAM-API by heart and program two boundary conditions every day (before breakfast) in my opinion groovyBC is the fastest way to get what you want (BTW: for your OF version you'll have to use "old school" groovyBC. Advantage: compilation is faster)

As you're very short on time: http://tinyurl.com/3fklrwd

i successed to set the Bcs that i mentioned in the last posts by using nonuniform BCs. now i wanna to add osscillation to the inlet after reaching to the steady state. i know how to use oscillating bc, but dont know how to set it be continued from previous issue!!!??? on the other hand i wanna set unsteady BCs so that after a special time that the problem reached to the steady state, apply oscillation at the inlet. whoud you tell me how do it?? tanx

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Old   August 27, 2011, 03:25
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can every one tell me how to exert (1-exp(-y^2)+0.5Cos2t) profile at the inlet BCs by groovy BCs?? i did not find any manual for groovyBC so that help me do it, i am very glad if intruduce me any documention a bout it.

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Old   August 27, 2011, 11:14
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Quote:
Originally Posted by desert_1250 View Post
can every one tell me how to exert (1-exp(-y^2)+0.5Cos2t) profile at the inlet BCs by groovy BCs?? i did not find any manual for groovyBC so that help me do it, i am very glad if intruduce me any documention a bout it.

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You asked the same question in three threads in under an hour. Rule of thumb: usually this makes it LESS likely that anyone cares to answer. See also http://openfoamwiki.net/index.php/Ho..._Message_Board
(especially points 5&7)
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Old   August 27, 2011, 13:10
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tnx for your attention, you are right!!!
I've done my work with a combination of two other boundary conditions, without use groovyBC )
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Old   August 27, 2011, 22:13
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Ehhh...there are many examples on the download page of GroovyBC, so it's really a question of *reading* before asking.
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Old   August 28, 2011, 02:11
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Quote:
Originally Posted by alberto View Post
Ehhh...there are many examples on the download page of GroovyBC, so it's really a question of *reading* before asking.
you are right too someone else no idea ...

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Old   March 22, 2013, 11:00
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Hello Håkan

I am going through your tutorial. I am using OpenFoam 2.1. I am a beginner and freshly started learning openFoam. I cannot find parabolicvelocity folder and relevant files in the path.
parabolicVelocity/parabolicVelocityFvPatchVectorField.C
parabolicVelocity/parabolicVelocityFvPatchVectorField.H

Can you please send them at sihaqqi@gmail.com. I shall be very grateful. I have tried to find them on internet but every link is useless.

Thanks and Regards
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Old   January 2, 2014, 19:17
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Quote:
Originally Posted by sihaqqi View Post
I am going through your tutorial. I am using OpenFoam 2.1. I am a beginner and freshly started learning openFoam. I cannot find parabolicvelocity folder and relevant files in the path.
parabolicVelocity/parabolicVelocityFvPatchVectorField.C
parabolicVelocity/parabolicVelocityFvPatchVectorField.H
FYI: The way to get those files and build them (for any OpenFOAM version) is fully explained here: Compile boundary condition as a new dynamic library post #10
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