what is the mean of laplacian(2*mu + lambda, U, "laplacian(DU,U)")
 

Dear Foamer

in stressedFoam or solidDisplacementFoam solvers
there is the fvm::laplacian(2*mu + lambda, U, "laplacian(DU,U)") term
what is the mean of "laplacian(DU,U)" in the above term

also what is the mean of "div(sigma)" in the bellow term
fvc::div
(
mu*gradU.T() + lambda*(I*tr(gradU)) - (mu + lambda)*gradU,
"div(sigma)"
)

best regards

Hi,

laplacian(DU,U) and div(sigma) are just keywords, so when OpenFOAM calculates the laplacian/divergence terms it will look up what laplacian/divergence method to use in system/fvSchemes beside the given keyword.

Philip

Dear Philip Cardiff
 

thanks so much