[Shakil Masum]

Dear Foamers,

Is it possible to solve "divergence of laplacian" in OpenFOAM? Please have a look at the second term in right hand side of the second equation.

How can I deal with this term in OpenFOAM.

Many Thanks

[FMDenaro]

Originally Posted by Shakil Masum

Dear Foamers,

Is it possible to solve "divergence of laplacian" in OpenFOAM? Please have a look at the second term in right hand side of the second equation.

How can I deal with this term in OpenFOAM.

Many Thanks

Divergence operator must act on a vector or tensor cannot act on a laplacian of a scalar function. Therefore the laplacian must act on a vector or a tensor. Hence, you can use the divergence in OF as it act on a general vector or tensor

[Shakil Masum]

Thanks DEnero,

You have spotted the problem. in the equations, a0 and a1's are scalar quantities.

Do you think it will be a good idea to convert the scalar field into a vector field, so that the laplacian becomes a vector and then the divergence can be applied. if this is the case then can you please suggest me the best approach.

cheers,

[FMDenaro]

Originally Posted by Shakil Masum

Thanks DEnero,

You have spotted the problem. in the equations, a0 and a1's are scalar quantities.

Do you think it will be a good idea to convert the scalar field into a vector field, so that the laplacian becomes a vector and then the divergence can be applied. if this is the case then can you please suggest me the best approach.

cheers,

well, I think you should see if the equation you wrote is a component of a vector equation (something as happens for the momentum equation)