19.6.5 Running Compressible Lagrangian PDF Transport Simulations

Compressibility is included when ideal-gas is selected as the density method in the Create/Edit Materials dialog box. For such flows, particle internal energy is increased by $p \Delta v$ over the time step $\Delta t$, where $p$ is the cell pressure and $\Delta v$ is the change in the particle specific volume over the time step.