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Generating a parabolic Profile with groovyBC
Hi,
How can i generate a parabolic velocity profile with groovyBC? The entry in the openfoamwiki isnt really helpful. The example "parabolic inlet condition that pulsates " generates an error and i cant find any "real" documentation. If someone could point me to the solution i would be really grateful. |
I managed to get a parabolic profile with
Code:
variables "w=0.00005;m=3;n=2;Umax=1*(m+1)*(n+1)/m/n;c=pos().y-w;d=pos().z-w;a=pow((c/w),2);b=pow((d/w),2);speed=Umax*(1-a)*(1-b);";pow() does not accecpt non integer values for the exponent like pow(a,1.5) is this a "normal" behaviour? and i need some function to get the distance from a point like distance = pos().z-w now this will result in an negative value if pos().z <w which "should" be positive, i tried abs() but it seems its not implemented and i tried something like sqr(pow(pos().z-w,2)) which doesnt work either. has anybody an idea? thanks |
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Bernhard |
Sorry for answering so late; I solved the problem another way.
I think (I did and learned a lot inf and of OpenFOAM the last days) I just missused the Expression. |
groovyBC
Hi,
Can someone tell me how I can use groovyBC? I read the article in OpenFoamWiki http://openfoamwiki.net/index.php/Co...rds_of_warning, but I do not understand this part: 1.2 Pre-requisites To compile this utility Bison has to be installed. The compilation is known to work with version 2.4.1. It may probably work with older versions. Check with bison -V on the command line before trying to compile it and report the version number when reporting a problem. 2 Usage 2.1 Compilation and installation Just do wmake libso in the directory of the sources. The library will be compiled and installed in a place (%FOAM_USER_LIBBIN) where it is usable I installed bison 2.4.1 like it is written in the install-file: ./configure make make install where do I now have to write "wmake libso"? What means "in the directory of sources"? Best Regards Chrisi |
Hi Chrisi,
you have to type "wmake libso" in the directory of groovyBC. The directory "make" should be in that directory where to type "wmake libso". -- Wenn du wmake eintippst sucht das Skript nach dem Ordner Make und dort nach den Steuerdateien, deswegen musst dein aktuelles Arbeitsverzeichnis Der Ordner sein wo der Ordner "make" drinliegt. |
Thank you,
I tried to do so but, I have a problem in compiling groovyBC. I am using OF 1.6.x. I have bison (GNU Bison) 2.4.1 and flex 2.5.35. I copied all the files of groovyBC from here https://openfoam-extend.svn.sourcefo...ries/groovyBC/. and put it into my run folder. When I compile it I get the following error: root@chrisilinux:~/OpenFOAM/OpenFOAM-1.6.x/lib/linuxGccDPOpt/groovyBC# wmake libso wmakeLnInclude: linking include files to ./lnInclude make: *** Keine Regel vorhanden, um das Target »PatchValueExpressionDriver.dep«, benötigt von »Make/linuxGccDPOpt/dependencies«, zu erstellen. Schluss. root@chrisilinux:~/OpenFOAM/OpenFOAM-1.6.x/lib/linuxGccDPOpt/groovyBC# I yet tried compiling with out coomented groovyBCPointPatchFields.C, but it did not help. Can you help me compilling groovyBC? Thanks in advance. Regards Chrisi |
okay ähm.
You ned to install "svn" if it isnt already there. Then go to a location of your choice, eg run/user_apps or whatever and paste the following line in the console Quote:
After svn did its job there should be a ne folder, go with the shell to the appropirate folder (where there is a subfolder "make") and enter "wclean" and than "wmake libso". Should work :D If there comes an error just post it here. Currently i have no OpenFOAM installed (or any linux) but i survived installing groovyBC ;) |
Thank you erklaerbaer!!
Vielen Dank!! Dann kann ich jetzt mal versuchen damit zu arbeiten. Now I can use groovyBC!! Regards Chrisi |
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