Oscillatory convection in a spherical cavity due to gjitter
Abstract
The convection caused by residual acceleration in axial direction in a spherical cavity heated at the equator and cooled at the poles is investigated. The spherical cavity is used as a first order model of the melting zone in a typical crystal growth experiment under microgravity. The resulting shift of the isotherms is calculated. If in order to avoid striations of the growing crystal a shift of the solidification isotherm by 1 micron is required, the amplitude of residual accelerations of 1 and 10 Hz must be 0.000001 and 0.0001 g respectively.
 Publication:

Mater. Sci. under Microgravity
 Pub Date:
 June 1983
 Bibcode:
 1983msum.rept..359L
 Keywords:

 Crystal Growth;
 Free Convection;
 Gravitational Effects;
 Oscillating Flow;
 Reduced Gravity;
 Vibration Effects;
 Microgravity Applications;
 NavierStokes Equation;
 Simulation;
 Space Commercialization;
 Striation;
 Temperature Distribution;
 Weightlessness;
 Fluid Mechanics and Heat Transfer