Runge-Kutta method for incompressible fluid
 

Hello All

I'm new OpenFOAM user and trying to implement a Runge-Kutta 4 method to solve an incompressible 2D lid driven cavity.
I do not know how to apply a fully explicit R-K 4 to correct the pressure and fluxes.
how can I relate the pressure correction equation to correct the velocity fluxes using an Explicit R-K 4?

Thanks
Reza