The effect of shear convection on diffusion measurements in liquid metals using the Foton shear cell

Shinsuke Suzuki, Kurt Helmut Kraatz, Günter Frohberg

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Abstract

The shear convection in the Foton shear cell was investigated quantitatively and interpreted as an additional diffusion-like mixing. Diffusion experiments were done under 1g and μg (Foton-M2 mission June 2005). Since the measured mean square diffusion depth (MSDD) is a linear function of time, the offset represents the additional mass transport (and the averaging effect due to the analysis by Atom Absorption Spectroscopy, AAS). The offset is 1-3% of the MSDD and can be used to eliminate this systematic error. The influence of the liquid's viscosity on the shear convection is discussed, using a simple fluid dynamical model. The absence of buoyancy convection in 1g-experiments was shown by comparison with the μg-result.

Original languageEnglish
Pages (from-to)155-159
Number of pages5
JournalMicrogravity Science and Technology
Volume18
Issue number3-4
Publication statusPublished - 2006
Externally publishedYes

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ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Mechanics of Materials
  • Computational Mechanics

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