Investigation of vibrational control of convective flows in Bridgman melt growth configurations

It is generally recognized that oscillatory, or pulsatile, flow significant ly alters the transfer of mass, heat and momentum in fluid systems. A numer ical investigation of thermovibrational buoyancy-driven now in differential ly heated cylindrical containers is presented as part of a study of thermov ibrational transport regimes in Bridgman-type systems. The formulation of a physical and mathematical model for this problem is outlined and its appli cation to the study of investigation of thermal vibrational Rows is discuss ed. Three types of vibration are considered: translational, circularly pola rized and rotational. It is demonstrated that forced vibration can signifca ntly affect flows that have been induced by g-jitter and selected results f or the cases of longitudinal and lateral vibrations an presented. (C) 2000 Elsevier Science B.V. All rights reserved.