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timevaryingfixedgradient Boundary condition

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Old   June 5, 2013, 01:04
Default timevaryingfixedgradient Boundary condition
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Nitin
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Hello all
I am working on the problem of Natural Convection as a part of my PhD. I am using Openfoam 2.2 and using buoyantBoussinesqPimpleFoam as a solver. I want to give time varying fixedGradient as a boundary condition in T file in 0 directory. Previously i used timevaryingUniformFixedValue successfully in Openfoam 1.6 but there is no such boundary condition available in Openfoam 2.2. I had gone through the several posts available in Openforum. I tried by giving my time varying fixed gradient data in the form of table in T directory itself but it doesn't work.
Please help.[/FONT]
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Old   June 5, 2013, 01:28
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Nima Sam
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if you want not to coding, you can easily use third party swak4Foam (groovyBC utility)
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Old   June 5, 2013, 06:30
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Thanks Nimasam for a quick reply.
I have seen utility of groovyBC as u said but what i learnt from that it's required time dependent expression of gradient. There is no option of reading a file having values containing time and gradient. I have a separate file containing time and gradient values. I am enclosing that file.
Please have a look.
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File Type: txt Aszodi.txt (4.9 KB, 14 views)
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Old   June 5, 2013, 07:48
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search in forum about reading file , i saw several times how to read values from a file, in groovyBC there is an option look at table which can do similar work
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Old   June 13, 2013, 05:09
Default timevaryingfixedgradient Boundary condition
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Hi Nimasam
Thanks for your reply.
I downloaded, Swak4Foam and tried to install it by using wmake all. I also did appropriate changes in the control dict file but when i run my case, an error is coming that this groovyBC boundary condition is not existing.
Am i not installing it correctly?
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Old   June 13, 2013, 05:25
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if you install it correctly, you should find groovyBC lib file in following address

Quote:
/home/user/OpenFOAM/user-x.x.0/platforms/linuxGccDPOpt/lib
x is openfoam version
user is your username
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Old   June 13, 2013, 05:29
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Hi Nimasam
It's not there. So what can i do. I already tried 3 times to install it.
Is there any other command apart from wmake all to install it.
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Old   February 22, 2014, 06:15
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Hi Nitin,

I am also having the same issue as yours. I have time and gradient values as a data file and am looking to use a timeVaryingFixedGradientValue type of boundary condition. However in my case, I'm worried about the linear interpolation of time values between two data entries since the variation in my case is far from linear.

Have you been able to find a way to solve this issue?
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