You are at the CVS movie page by Alex Fedoseyev at CMMR, UAH. These movies visualize the results of 3D numerical modeling of the thermal vibrational convection in cylindrical containers (AIAA 99-0839 paper by A.Fedoseyev & J.I.D. Alexander). Movies show flows in Bridgman melt configurations for two typical materials, semiconductor and oxide melts, subject to polarized vibrations. This type of vibration was introduced to the crystal growth processes by Prof. Robert S. Feigelson at Stanford University in 1987 (J. Cryst. Growth 82 (1987)). Coupled Vibrational Stirring (CVS) is provided by vibrational acceleration in horizontal plane (X,Y). The acceleration amplitude is constant, its direction rotates in horizontal plane with a frequency f. Movies show velocity components,(Vx, Vy, Vz) in a vertical cross-section, pressure, temperature and concentration. In case of semiconductors the temperature field remains almost unperturbed due to the low Prandtl number. Therefore we present a movie for the temperature deviation DT from the stationary, linear in Z-direction field. The flow is quite different for the oxide melts due to their three order higher Prandtl number. Here is a semiconductor melt flow movie. Parameters are: L/D=5, Pr=1E-2 Rav=7E4, Ra=7E3,f=100Hz. Vx velocity movie (click picture) Click on the picture to start movie (10 frames/s, size 800Kb, case GJ33) or select Vy, Vz, P, Vm, DT component Oxides are here

If your internet connection is slow (less than 20Kb/s) It is recommended to download movie file (SHIFT+mouse click) to your local computer and to watch it locally

Comments: There is no motion at Time=0. Red color corresponts the maximal value of the velocity, Blue color means the minimal value. Movie never ends (infinite loop). Click STOP to stop.
(A. Fedoseyev, CMMR, University of Alabama in Huntsville, USA)
alex@cmmr.uah.edu