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

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