[immortality]

Hi
whats the definition of enstrophy?
It gives this error when I run it:

Time = 0.000126
    Reading U
    Calculating enstrophy
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword curl(U) is undefined in dictionary "/home/ehsan/Desktop/Central/WR_Main_Central/system/fvSchemes.gradSchemes"

file: /home/ehsan/Desktop/Central/WR_Main_Central/system/fvSchemes.gradSchemes from line 36 to line 49.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 402.

Time = 0.000127
    Reading U
    Calculating enstrophy
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword curl(U) is undefined in dictionary "/home/ehsan/Desktop/Central/WR_Main_Central/system/fvSchemes.gradSchemes"

file: /home/ehsan/Desktop/Central/WR_Main_Central/system/fvSchemes.gradSchemes from line 36 to line 49.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 402.

Time = 0.000128
    Reading U
    Calculating enstrophy
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword curl(U) is undefined in dictionary "/home/ehsan/Desktop/Central/WR_Main_Central/system/fvSchemes.gradSchemes"

file: /home/ehsan/Desktop/Central/WR_Main_Central/system/fvSchemes.gradSchemes from line 36 to line 49.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 402.

Time = 0.000129
    Reading U
    Calculating enstrophy
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword curl(U) is undefined in dictionary "/home/ehsan/Desktop/Central/WR_Main_Central/system/fvSchemes.gradSchemes"

file: /home/ehsan/Desktop/Central/WR_Main_Central/system/fvSchemes.gradSchemes from line 36 to line 49.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 402.

[wyldckat]

1. Run:
   

   find $FOAM_APP -name "enstrophy.C"

2. Open the file indicated by the previous command. In the description section it says:
   

   Description
       Calculates and writes the enstrophy of the velocity field U.

3. OK, not much information there. Looking at the the calculation made:
   

   0.5*magSqr(fvc::curl(U))

   "curl" is explained in the OpenFOAM's Programmer Guide, available at "$WM_PROJECT_DIR/doc/Guides*":
   

   echo $WM_PROJECT_DIR/doc/Guides*

4. For "enstrophy" in general, check Wikipedia: http://en.wikipedia.org/wiki/Enstrophy