The problem of natural heat convection suppression in the earth gravity with the help of vibration is studied. Geometries of Bridgman vertical and Bridgman horizontal crystal growth configurations are considered. The efficiency of fluid motion damping under magnetic field and field of vibrations is compared. In the horizontal Bridgman geometry on earth the damping is more efficient with the magnetic field for semiconductor melts with relatively high electroconductivity. For the vertical Bridgman geometry with horizontal vibration, a significant braking of fluid movement near the bottom of the crucible could be achieved (particularly in the region near the solid-liquid interface where conditions for purely diffusive mass transfer growth can be met).