Originally Posted by bigbang (Post 319071)

Hi. I don't know if it's because I'm using openFoam 2.0.0, but I get this error after trying to run the code

Any ideas? Basically when I don't put a patch name, the program says I'm missing an argument. When I do put a patch name it returns the error quoted above. Help. Thanks.

Originally Posted by gschaider (Post 319269)

Not 100% sure but usually if the code SegFaults at this basic_string the problem is that you're mixing binaries (library and exe) produced by two different g++-versions. But your milage may vary

Originally Posted by bigbang (Post 319295)

Thanks for the reply gschaider. I don't think I understand where to go from here. Can you take a look at my code and wmake output.

Originally Posted by gschaider (Post 319326)

Check this by compiling another 3rd party utility. Or by copying the sources of a utility that comes with OF, modifying the Make/files (so that you don't overwrite the original binary), compiling and runnig that.

Originally Posted by bigbang (Post 319329)

I copied the icoFoam source and added a scalar transport model for Temperature following an online tutorial and it ran perfectly. I will pursue a new direction thanks.

Originally Posted by bigbang (Post 319343)

Ahh. Thank you. I fixed this since I am running OF 2.0.0. It worked, but then I get the same error further into the code...

Is there another convention in there that may not be up to standard for OF 2.0.0?

Originally Posted by markc (Post 192874)

Lets try WITH attachment this time
http://www.cfd-online.com/OpenFOAM_D...hment_icon.gif setBoundarygamma.zip

Originally Posted by ami (Post 192862)

Hi Chen Jun

I am interested in considering nonuniform boundary conditions in my computations (e.g., a laminar Blasius boundary layer inflow condition along the free stream flow condition). Please can you specify the file name you described and how to use it?

thanks

Originally Posted by hani (Post 192863)

This thread actually belongs in preprocessing. Anyway, Chen actually describes the basics of how to set your boundary conditions. It is however a bit difficult to understand for a beginner. Let me, as a slightly more than beginner try to help you in a more detailed way (there might be other solutions also):

It is unlikely that there is such a boundary condition already implemented and distributed in OpenFoam. You will have to implement it yourself. This goes at least for less common bc's.

A suggestion on how to implement the steady bc (reads 0 and overwrites 0):

Step 1:
Copy the source directory of the particular solver that you want to use to your personal applications directory. For instance:
mkdir ~/OpenFOAM/hani-1.2/applications (if you don't have it)
cp -r OpenFOAM/OpenFOAM-1.2/applications/solvers/incompressible/simpleFoam ~/OpenFOAM/hani-1.2/applications/

Step 2:
Rename your copied directory to something that makes sence, for instance:
mv ~/OpenFOAM/hani-1.2/applications/simpleFoam ~/OpenFOAM/hani-1.2/applications/blasiusBC
Rename the .C-file in your blasiusBC directory to blasiusBC.C
Edit blasiusBC.C: Insert correct descriptions for Application and Description in the header of the file, for clarity. Remove everything in the main function except the include statements in the beginning. You may later on check which ones you actually need by commenting them and try to compile. The compiler error messages will guide you.

Step 3:
Implement your bc's using the directives that Chen gave you. This should be located after the include statements in the main function.
Write out the variables you have changed at the end of the main function:
// Force the write
U.write();
k.write();
epsilon.write();
phi.write();

Info<< "\n ExecutionTime = "
<< runTime.elapsedCpuTime()
<< " s\n" << endl;

Info<< "End" << endl;

return(0);

Step 4:
Edit blasiusBC/Make/files to make sure that the filenames blasiusBC is used instead of the name of the original application.

Step 5:
Compile.
Move to your blasiusBC directory and type
wmake

Step 6:
type:
rehash
to make the executable available.

Step 7:
Set your bc's by typing:
blasiusBC <root> <case>
which will change the files in your <root>/<case>/0 directory to include the bc's you defined in blasiusBC.

Step 8:
Run your case using the solver you need for the application. It will read the 0 directory and get the correct bc's.

Good luck!
Håkan.

Originally Posted by isabel (Post 451582)

Dear everybody,

In this forum you explain how to implement a non-uniform value as boundary condition. For instance, U=whatever.
I need to implement a non uniform temperature gradient as boundary condition. How can I do it?

Regards

Originally Posted by gironidegirona (Post 515397)

Hi you all,

I think that your proposal solution for a variable boundary condition (I understand in time) is to modify the solver.

I would like to have a variable boundary condition depending on the position on the boundary itself. My approach is to modify the (for example) U values list and on the boundary set the value of each element on a list. The thing to know is if this is possible, and if it is how I do that? which is the element order?
example:

Inlet
{
list of values on each boundary element
}


Thanks in advance