Diffusion measurements using the shear cell technique: Investigation of the role of Marangoni convection by pre-flight experiments on the ground and during the Foton M2 mission

Raluca Roşu-Pflumm, Wolfgang Wendl, German Müller-Vogt, Shinsuke Suzuki, K. H. Kraatz, G. Frohberg

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

An experimental investigation on the disturbing influence of the solutal Marangoni convection during diffusion measurements is presented. We used the systems Sn-Bi, Pb-Ag and Sn-In with decreasing differences in surface tension. For all systems we measured surface tension and - under varying free surface conditions - diffusion coefficients. We succeeded in measuring diffusion coefficients on the ground under nearly non-free surface conditions. The results are compared with the results of the FOTON M2-satellite mission with similar μg-experiments. We show that temperatures from around 400 °C to about 800 °C and the degree of free surfaces influences strongly the measured value for the diffusion coefficient.

Original languageEnglish
Pages (from-to)6042-6049
Number of pages8
JournalInternational Journal of Heat and Mass Transfer
Volume52
Issue number25-26
DOIs
Publication statusPublished - 2009 Dec

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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