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 language | English |
|---|---|
| Pages (from-to) | 6042-6049 |
| Number of pages | 8 |
| Journal | International Journal of Heat and Mass Transfer |
| Volume | 52 |
| Issue number | 25-26 |
| DOIs | |
| Publication status | Published - 2009 Dec |
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanical Engineering
- Fluid Flow and Transfer Processes
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Roşu-Pflumm, R., Wendl, W., Müller-Vogt, G., Suzuki, S., Kraatz, K. H., & Frohberg, G. (2009). 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. International Journal of Heat and Mass Transfer, 52(25-26), 6042-6049. https://doi.org/10.1016/j.ijheatmasstransfer.2009.06.001