5 betav*fvm::ddt(rho, hu)
6 + mvConvection->fvmDiv(phi, hu)
7 - fvm::laplacian(Db, hu)
9 // These terms cannot be used in partially-premixed combustion due to
10 // the resultant inconsistency between ft and hu transport.
11 // A possible solution would be to solve for ftu as well as ft.
12 //- fvm::div(muEff*fvc::grad(b)/(b + 0.001), hu)
13 //+ fvm::Sp(fvc::div(muEff*fvc::grad(b)/(b + 0.001)), hu)
16 betav*DpDt*rho/thermo.rhou()