questions about the 'diagnostic_fields' in the input file

[javierchang]

When I run the test case of 'cylinder' in the Navier-Stokes, the tecplot file it write contains only 6 variables("x", "y", "rho", "mom_x", "mom_y", "ene"). Then I want more variables,like u,v,Mach,etc , to be written into tecplot file. So I add a new line of 'diagnostic_fields 3 u v mach' into the input file. But astonishingly, after running the code, there were still six default variables in the tecplot file, without the u,v,mach I prescribed in the input files. Then I 'cout' the value of 'n_diagnostic_fields' in the output.cpp and it turns out the value of 'n_diagnostic_fields' is still zero, indicating it remains the default setting.

I check the input.cpp and find these lines: (1) opts.getVectorValueOptional("diagnostic_fields",diagnostic_fields); (2) n_diagnostic_fields = diagnostic_fields.get_dim(0); (3) while (getline(optFile,str)) { // Remove any leading whitespace & see if first word is the input option stringstream ss; ss.str(str); ss >> optKey; if (optKey.compare(optName)==0) { int nVals; if (!(ss >> nVals)) { // This could happen if, for example, trying to assign a string to a double cerr << "WARNING: Unable to read number of entries for vector option " << optName << endl; string errMsg = "Required option not set: " + optName; FatalError(errMsg.c_str()); }

  opt.resize(nVals);
  for (int i=0; i<nVals; i++) {
    if (!ss >> opt[i]) {
      cerr << "WARNING: Unable to assign all values to vector option " << optName << endl;
      string errMsg = "Required option not set: " + optName;
      FatalError(errMsg.c_str())
    }
  }

  closeFile();
  return;
}

the value of 'n_diagnostic_fields' should be altered to 3, but I do not know why it remains default zero. So I need some helps about this.

Best regards javier chang

[mlopez14]

Thanks for bringing this to our attention! In theory there should be no problem. Would you mind sending us your input file so we can take a look at it? I would suggest you upload it to a service like Dropbox and send us the link.

We have recently modified the way input files are read to allow for more flexibility and haven't gotten to updating the Wiki.

[JacobCrabill]

I found the bug(s) and fixed them; do a git pull and remake, and your input file should work now - let us know if it doesn't!

[javierchang]

Now, after the debugging, the input file with diagnostic fields works well and it can write additional variables into tecplot files. Thanks a lot, Crabill and Lopez, for the effort of fixing the bug!

Best regards! javier chang