Change values in patchField

SirIsaac90 · July 1, 2016, 03:02

Hi Foamers!

I want to change a C-code a little bit. Therefore, I want to change only the values of

Code:

const scalarField rhow =
            patch().lookupPatchField<volScalarField, scalar>("rho");

,
which are greater or less than a specific value. As an example, one could describe it like this:

$\rho = \begin{matrix} 1.18 & 1.18 & 9 \\ 1.18 & 1.18 & 11 \\ 1.18 & 1.18 & 1.18 \end{matrix}.$

This should the be set to

$\rho = \begin{matrix} 1.18 & 1.18 & 1.18 \\ 1.18 & 1.18 & 1.18 \\ 1.18 & 1.18 & 1.18 \end{matrix},$

because i want to set all values

to

.
This should be done with an if-statement.

Anyone, who could help me with this? This would help me a lot.

Regards
JW

Jerryfan · July 6, 2016, 08:30

Quote:

scalarField& rhow =
patch().lookupPatchField<volScalarField, scalar>("rho");

const scalar& value=2;
const scalar& valuenew=1.18;

forAll(rhow, index)
{
if (rhow[index] > value)
rhow[index] = valuenew;
}

instead of using a const scalarField, you have to change it to a reference or just normal variable. This should work fine.

July 1, 2016, 03:02	Change values in patchField	#1
SirIsaac90 New Member Justin Wiegmann Join Date: Aug 2015 Posts: 20 Rep Power: 10	Hi Foamers! I want to change a C-code a little bit. Therefore, I want to change only the values of Code: const scalarField rhow = patch().lookupPatchField<volScalarField, scalar>("rho"); , which are greater or less than a specific value. As an example, one could describe it like this: $\rho = \begin{matrix} 1.18 & 1.18 & 9 \\ 1.18 & 1.18 & 11 \\ 1.18 & 1.18 & 1.18 \end{matrix}.$ This should the be set to $\rho = \begin{matrix} 1.18 & 1.18 & 1.18 \\ 1.18 & 1.18 & 1.18 \\ 1.18 & 1.18 & 1.18 \end{matrix},$ because i want to set all values to . This should be done with an if-statement. Anyone, who could help me with this? This would help me a lot. Regards JW

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