[shovan]

Hi everybody i have a problem understanding the below problem. What i don't understand is what does 'fvmDIV' stands for, what does '?' stands for, what does 'fvOptions(rho,he)' do? Is there any material available which speaks of all the below used symbols?

fvScalarMatrix EEqn
(
fvm::ddt(rho, he) + mvConvection->fvmDiv(phi, he)
+ fvc::ddt(rho, K) + fvc::div(phi, K)
+ (
he.name() == "e"
? fvc::div
(
fvc::absolute(phi/fvc::interpolate(rho), U),
p,
"div(phiv,p)"
)
: -dpdt
)
- fvm::laplacian(turbulence->alphaEff(), he)
==
reaction->Sh()
+ fvOptions(rho, he)
);