problem Hcoeff display
I have perfored an aanlysis and I'm trying to disply the hcoeff, but I can't the following message appear: wall variable hflu is not on the data file...what that means???
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Re: problem Hcoeff display
Hello raffap,
What is hcoeff? A coefficient which concerns a wall parameter? George |
Re: problem Hcoeff display
hcoeff is the heat transfer coefficent, I have to display this coefficent on a wall boundary. the command is getw-->hcoeff,tbulk
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Re: problem Hcoeff display
did you post it in .pst? You have to choose post in the output tab
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Re: problem Hcoeff display
Select it at the output tab and do a restart run with zero iterations and hcoe should be in the *.pst file.
If you are using version 4 without solving the temperature equation you mith have to cheat a bit and tweak the *.prob file using the following script: #!/usr/bin/perl print "modifying *.prob-File for writing htran\n"; if (!defined $ARGV[0]) { print "USAGE : htran.pl casename\n"; exit; } $case = $ARGV[0]; $file = "${case}.prob"; $line = "POSTWL SHEA YPLU DIST HTRA"; open(IFILE , "<$file") || die "Datei $file ist nicht vorhanden"; @alles = <IFILE>; $text = join("",@alles); close(INFILE); $text =~ s/POSTWL.*/$line/; open(OUTFILE , ">$file") || die "Datei ... ist nicht vorhanden"; print OUTFILE "$text"; close(OUTFILE); |
Re: problem Hcoeff display
The forum software has some problems with perl code.
the line with @alles should be @alles = <_IFILE_> ; without the "_" characters |
yplus value in heat transfer
hi expert my problem is finding the heat transfer coefficient around the cylinder in a uniform flow. but i got the ypus value nearly .5 to 3. according to my theoretical knowledge for this yplus value k-e model overpredict the heat transfer. how to get the accurate heat transfer coefficient. but i cant provide the fine mesh in near walls because i want to find the boundary layer effects how to use wall functions for this kind of problem
by kathir |
Re: yplus value in heat transfer
Hi raffap, Check whether your postprocessing Result file or restart file. I have this problem some time before, I had spent nearly a day to plot HTC from, without noticing that I am loading restart file.
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