[Danny_cfd]

Hello, everybody. Nice day.

I am currently using WallgradU utility of the OpenFOAM with the latest version. I think it has some compatibility issue with the new openfoam version and i am not able to solve it as i am amature in openfoam coding.
After compiling using the wmake, following error appears in it:

wallGradU.C:71:21: error: ‘class Foam::IOobject’ has no member named ‘headerOk’
if (Uheader.headerOk())
^~~~~~~~
wallGradU.C:102:55: error: passing ‘const Foam::fvPatchField<Foam::Vector<double> >’ as ‘this’ argument discards qualifiers [-fpermissive]
-U.boundaryField()[patchi].snGrad();

There are total of two errors. I am unable to solve it. Please help me. Thank you so much.

The wallgradU utility file is as following:

/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright held by original author
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the
    Free Software Foundation; either version 2 of the License, or (at your
    option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM; if not, write to the Free Software Foundation,
    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Application
    wallGradU 

Description
    Calculates and writes the gradient of U at the wall

\*---------------------------------------------------------------------------*/

#include "fvCFD.H"


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

int main(int argc, char *argv[])
{

#   include "addTimeOptions.H"
#   include "setRootCase.H"

#   include "createTime.H"

    // Get times list
    instantList Times = runTime.times();

    // set startTime and endTime depending on -time and -latestTime options
#   include "checkTimeOptions.H"

    runTime.setTime(Times[startTime], startTime);

#   include "createMesh.H"

    for (label i=startTime; i<endTime; i++)
    {
        runTime.setTime(Times[i], i);

        Info<< "Time = " << runTime.timeName() << endl;
IOMap<dictionary> ioObj
(
        IOobject Uheader
        (
            "U",
            runTime.timeName(),
            mesh,
            IOobject::MUST_READ
        );

        // Check U exists
        if (Uheader.headerOk())
        {
            mesh.readUpdate();

            Info<< "    Reading U" << endl;
            volVectorField U(Uheader, mesh);

            Info<< "    Calculating wallGradU" << endl;

            volVectorField wallGradU
            (
                IOobject
                (
                    "wallGradU",
                    runTime.timeName(),
                    mesh,
                    IOobject::NO_READ,
                    IOobject::AUTO_WRITE
                ),
                mesh,
                dimensionedVector
                (
                    "wallGradU",
                    U.dimensions()/dimLength,
                    vector::zero
                )
            );

            forAll(wallGradU.boundaryField(), patchi)
            {
                wallGradU.boundaryField()[patchi] =
                    -U.boundaryField()[patchi].snGrad();
            }

            wallGradU.write();
        }
        else
        {
            Info<< "    No U" << endl;
        }
    }

    Info<< "End" << endl;

    return(0);
}


// ************************************************************************* //

[SHUBHAM9595]

Hi Danny,

I also came across the same issue long time ago.

Now if u look closely the "headerOK" is being used only as a precaution if u r providing correct input file or not (read its else for proof ).....so you can safely comment it out....as long as u ensure to provide the correct U file (version,format,class,location & object)


For the second error, try changing the syntac from *.boundaryField() to *.boundaryFieldRef()

If u r interested in more info about this syntax change....u can go through the following link

https://github.com/OpenFOAM/OpenFOAM...4cccf0296be520