Space experiment on thermal diffusion. Preparation and theoretical analysis
Abstract
A spaceborne experiment on the Soret coefficient of a binary solution is suggested. Analysis of the experimental problems in measuring emf variations induced by thermal diffusion on a AgIxKI(1x) system indicates a thermodiffusion cell design. A mathematical treatment of the convective problem in a case close to experimental conditions, and with two microgravity levels is outlined. The separations (normalized to 1 for pure Soret effect) are 0.46 and 0.98 for g = 0.001 and 0.0001, respectively, indicating that 0.0001 is a threshold for the separation regime (corresponding to an unperturbed separation). A cell size decrease to check the measurement validity is proposed.
 Publication:

Mater. Sci. under Microgravity. Results of Spacelab 1
 Pub Date:
 December 1984
 Bibcode:
 1984msum.symp..347B
 Keywords:

 Experiment Design;
 Soret Coefficient;
 Spaceborne Experiments;
 Thermal Diffusion;
 Binary Fluids;
 Marangoni Convection;
 Molten Salts;
 Reduced Gravity;
 Space Commercialization;
 Thermal Conductivity;
 Fluid Mechanics and Heat Transfer