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
Externally publishedYes

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Marangoni convection
diffusion coefficient
flight
shear
interfacial tension
cells
Surface tension
Experiments
Satellites
Convection
temperature
Temperature

ASJC Scopus subject areas

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

Cite this

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

In: International Journal of Heat and Mass Transfer, Vol. 52, No. 25-26, 12.2009, p. 6042-6049.

Research output: Contribution to journalArticle

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