[Michael@UW]

I want to manually switch the time scheme in the code, for example, when t<100, using Euler, otherwise using backward.


Is there a way to achieve this goal in the code?
It seems the ddtScheme always read the data from the file fvSchemes. I cannot dynamically switch the scheme.


Thanks!

[dlahaye]

Using foamDictionary inside Allrun script?

[Yann]

The timeActivatedFileUpdate function object does exactly this:

• OpenFOAM foundation: https://github.com/OpenFOAM/OpenFOAM...edFileUpdate.H
• ESI-OpenCFD: https://develop.openfoam.com/Develop...edFileUpdate.H

Cheers,
Yann

[Michael@UW]

Originally Posted by Yann

The timeActivatedFileUpdate function object does exactly this:

• OpenFOAM foundation: https://github.com/OpenFOAM/OpenFOAM...edFileUpdate.H
• ESI-OpenCFD: https://develop.openfoam.com/Develop...edFileUpdate.H

Cheers,
Yann

Yann,

Thank you for reply. Using this method can solve my current problem and it works for every case. But I want to control the scheme in the code directly something like this:

template<class Type>
 
tmp<ddtScheme<Type>> ddtScheme<Type>::New
 
(
 
    const fvMesh& mesh,
 
    Istream& schemeData
 
)
 
{


 
 
    const word schemeName(schemeData);
 
 
 
    auto* ctorPtr = IstreamConstructorTable(schemeName);
 
 
 

return ctorPtr(mesh, schemeData);
 
}

The ddtScheme is created by reading the fvScheme file. I would like to create the ddtScheme manually and switch different schemes flexibly.