Numerical investigation of the drag force reduction induced by the two-phase flow generating on the solid body surface

An article presents an analysis of the drag force reduction during the hot spherical and cylindrical body movement in the water in comparison with the movement of the cold bodies. Influence of two-phase water–vapor flow on the drag was investigated experimentally and numerically using the ANSYS CFX code. The preliminary results of the investigation showed a sufficient reduction of the drag force for the hot body in comparison to the cold body due to the vapor presence.