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Hydrodynamic processes in a vertical well casing during implosion are considered. Mathematical modeling of the motion of a two-phase medium with a free surface is based on the volume of fluid method. Unsteady Reynolds-Averaged Navier-Stokes equations are supplemented by the Menter’s Shear Stress Transport turbulence model. Numerical calculations were performed by the finite volume method using the open integrated platform OpenFOAM. It was found that the depression period is 1 s, and the maximum pressure at the control point is 1.8 times higher than the hydrostatic pressure at the given input parameters.

No isothermal viscous incompressible fluid flow past a porous permeable balk of square cross section was investigated. The equations of the conservation of the momentum and energy are solved numerically using the finite volume method. The flow pattern, the dependence of the drag and the cylinder Nusselt number on the Reynolds number, Darcy was analyzed.