openVSP to CART3D

[DR Millman]

Rob,

I'm following your tutorial example. I get to the ./aero.csh step, and things go awry. I'm in a csh when I execute, but the ./aero.csh does not work. I did get an execution when I typed "source aero.csh", but flowcart fails with a status 253. Any ideas?

Thanks

Danny

[Rob McDonald]

Danny,

You should be able to run ./aero.csh from any shell -- bash, ksh, csh, whatever.

It may be that the executable bit is not set. Consequently, it is not
executable itself, but when run through source, it works. Try
this....

chmod +x aero.csh

As for status 253, I have no idea. I suggest you ask on the Cart3D
Google Group.

Digging into aero.csh, it appears that 253 is a file parsing error in
flowCart. If you've gotten that far, I don't have any ideas what the
problem is.

Rob

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[DR Millman]

Rob,

I just needed to change windows line endings to UNIX line endings. It's working now.

Thanks

Danny

[Rob McDonald]

Great, glad to hear it.

In which file did you need to make the change?

Rob

[DR Millman]

Both input.cntl and aero.csh.

[DR Millman]

Rob,

I wanted to run CART3D without adaptation. So I used the oneraM6 model from the tutorial and the input.cntl file. In the input.cntl file, I removed the design info. I wrote a commands.csh script to setup and run flowCart. The results indicated that the axes are not what I expected. I reran setting alpha to zero and beta to 3.06, and the lift coefficient made sense, but the drag coefficient was too low.

I attached the files I used: input1.cntl is modified from the tutorial, and loadsCC1.dat are the clic2 results; input2.cntl exchanges alpha with beta and loadsCC2.dat are the results.

Any help you could provide to get me properly oriented would be greatly appreciated.

Thanks,

Danny

[Rob McDonald]

Danny,

I've never run Cart3D 'manually'. When I want to run a case with no
adaptation, I still use aero.csh, but I just turn off adaptation. If
your Cart3D distribution is different, this won't work for you.

You'll probably have better luck asking on the Cart3D group, but I'll
give it a shot.

In your commands.csh, you do this...

set y_is_spanwise = -y_is_spanwise

But, flowcart does not read variables like this from the environment.
I believe everything is passed to flowcart on the command line. I
believe the actual execution of flowCart happens on line 659 of
aero.csh as downloaded from the Wiki.

( $timer $flowCart $verb -his -N $it_fc -T $binaryIO -clic
$mg_gs_fc $mg_levs -limiter $limiter -tm $tm -cfl $cfl $y_is_spanwise
$fc_restart $fmg $blcc $buffLim $subcell >> cart3d.out ) >&! $timeInfo

It is a mess, but you can see that the variable $y_is_spanwise is
passed to flowcart on the command line.

So, I would try this in your script....

flowCart -mg 4 -N 100 -his -T -clic -v -y_is_spanwise

Rob

[DR Millman]

That did it! Thanks!