[Nitin Minocha]

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]

[nimasam]

if you want not to coding, you can easily use third party swak4Foam (groovyBC utility)

[Nitin Minocha]

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.

[nimasam]

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

[Nitin Minocha]

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?

[nimasam]

if you install it correctly, you should find groovyBC lib file in following address

/home/user/OpenFOAM/user-x.x.0/platforms/linuxGccDPOpt/lib

x is openfoam version
user is your username

[Nitin Minocha]

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.

[Sherlock_1812]

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?