Derivative of velocity and mean velocity

hiuluom · January 30, 2014, 12:18

Dear all,

I would like to calculate $\frac{\partial^2 \langle u_i\rangle}{\partial x_j^2}$ and $\frac{\partial \langle u_i\rangle}{\partial x_j}$ , <u> its means umean. At first, I want to test foamCalc and foamCalcEx with div(u) or grad(u), but it has error. Can anyone help me check it?

Code:

Selecting calcType div
/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.1.1                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : 2.1.1-221db2718bbb
Exec   : foamCalc div U
Date   : Jan 30 2014
Time   : 23:03:37
Host   : "compeng"
PID    : 7276
Case   : /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Disallowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create mesh for time = 0

Time = 0
    Reading U
    Calculating divU
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword div(U) is undefined in dictionary "/home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes"

file: /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes from line 36 to line 45.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 400.

Time = 0.01
    Reading U
    Calculating divU
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword div(U) is undefined in dictionary "/home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes"

file: /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes from line 36 to line 45.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 400.

Time = 0.02
    Reading U
    Calculating divU
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword div(U) is undefined in dictionary "/home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes"

file: /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes from line 36 to line 45.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 400.

Time = 0.03
    Reading U
    Calculating divU
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword div(U) is undefined in dictionary "/home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes"

file: /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes from line 36 to line 45.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 400.

Time = 0.04
    Reading U
    Calculating divU
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword div(U) is undefined in dictionary "/home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes"

file: /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes from line 36 to line 45.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 400.

Time = 0.05
    Reading U
    Calculating divU
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword div(U) is undefined in dictionary "/home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes"

file: /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes from line 36 to line 45.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 400.

Time = 0.06
    Reading U
    Calculating divU
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword div(U) is undefined in dictionary "/home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes"

file: /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes from line 36 to line 45.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 400.

Time = 0.07
    Reading U
    Calculating divU
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword div(U) is undefined in dictionary "/home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes"

file: /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes from line 36 to line 45.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 400.

Time = 0.08
    Reading U
    Calculating divU
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword div(U) is undefined in dictionary "/home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes"

file: /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes from line 36 to line 45.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 400.

Time = 0.09
    Reading U
    Calculating divU
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword div(U) is undefined in dictionary "/home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes"

file: /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes from line 36 to line 45.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 400.

Time = 0.1
    Reading U
    Calculating divU
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword div(U) is undefined in dictionary "/home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes"

file: /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes from line 36 to line 45.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 400.

Time = 0.10001
    Reading U
    Calculating divU
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword div(U) is undefined in dictionary "/home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes"

file: /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes from line 36 to line 45.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 400.

Time = 0.11
    Reading U
    Calculating divU
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword div(U) is undefined in dictionary "/home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes"

file: /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes from line 36 to line 45.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 400.

Time = 0.12
    Reading U
    Calculating divU
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword div(U) is undefined in dictionary "/home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes"

file: /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes from line 36 to line 45.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 400.

Time = 0.13
    Reading U
    Calculating divU
--> FOAM Warning : 
--> FOAM FATAL IO ERROR: 
keyword div(U) is undefined in dictionary "/home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes"

file: /home/huynh/OpenFOAM/huynh-2.1.1/run/pitzDaily/system/fvSchemes::divSchemes from line 36 to line 45.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 400.

End

Thank you.

Best regards,
Thanh.

hiuluom · May 30, 2015, 00:42

The problem above were solved at link:

http://www.cfd-online.com/Forums/ope...-parafoam.html

May 30, 2015, 00:42		#2
hiuluom Senior Member Huynh Phong Thanh Join Date: Aug 2013 Location: Ho Chi Minh City Posts: 105 Rep Power: 13	The problem above were solved at link: http://www.cfd-online.com/Forums/ope...-parafoam.html