[Tushar@cfd]

Dear Foamers,

I wish to use identity matrix "I" for a Tensor field. I am using the following line for writing the identity matrix.

    volTensorField Ei = I ;

The above code line generates the following error, by looking at error it is clear that problem seems to be with the transformation of Tensors (spherical -to- volume field). For my case I need volTensorField to represent the identity matrix. How to resolve this issue?

testFoam.C: In function ‘int main(int, char**)’:
testFoam.C:71:22: error: conversion from ‘const sphericalTensor {aka const Foam::SphericalTensor<double>}’ to non-scalar type ‘Foam::volTensorField {aka Foam::GeometricField<Foam::Tensor<double>, Foam::fvPatchField, Foam::volMesh>}’ requested

Thanks in Advance!

[jherb]

Try something like

 volTensorField Ei = tensor::one;

[alexeym]

Hi,

Either use correct constructor (something like this):

volTensorField Ei
(
    IOobject
    (
         "Ei",
         runTime.timeName(),
         mesh,
         IOobject::NO_READ,
         IOobject::AUTO_WRITE
    ),
    mesh,
    <dimensions>,
    <BC type>,
    I
);

if you plan to modify the field later, or, if you just need a constant in expression, use I.

[Tushar@cfd]

Thanks a lot for your quick replies. It worked

[infinity]

Hi
I've put

   volTensorField Ei;

in my header file and this

 Ei
     (
         IOobject
         (
              "Ei",
              runTime_.timeName(),
              mesh_,
              IOobject::NO_READ,
              IOobject::AUTO_WRITE
         ),
         mesh_,
     ),

in my LES model constructor to define the identity tensor but unfortunately compiler said

error: expected primary-expression before ‘)’ token

any idea?

[Tushar@cfd]

Originally Posted by infinity

Hi
I've put

   volTensorField Ei;

in my header file and this

 Ei
     (
         IOobject
         (
              "Ei",
              runTime_.timeName(),
              mesh_,
              IOobject::NO_READ,
              IOobject::AUTO_WRITE
         ),
         mesh_,
     ),

in my LES model constructor to define the identity tensor but unfortunately compiler said

error: expected primary-expression before ‘)’ token

any idea?

Dear Amir,

Try these:

 volTensorField Ei
     (
         IOobject
         (
              "Ei",
              runTime_.timeName(),
              mesh_,
              IOobject::NO_READ,
              IOobject::AUTO_WRITE
         ),
         mesh_,
     );

and

Ei = tensor::one;

This will do the job.

-
Best Luck!

[infinity]

Dear Tushar

I solved the problem by using

tensor Ei(1,0,0,0,1,0,0,0,1);

and it worked ,

wish U the best my friend and thanks a lot for quick answering