TY - JOUR
T1 - Diffusion measurements using the shear cell technique
T2 - Investigation of the role of Marangoni convection by pre-flight experiments on the ground and during the Foton M2 mission
AU - Roşu-Pflumm, Raluca
AU - Wendl, Wolfgang
AU - Müller-Vogt, German
AU - Suzuki, Shinsuke
AU - Kraatz, K. H.
AU - Frohberg, G.
PY - 2009/12
Y1 - 2009/12
N2 - 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.
AB - 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.
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U2 - 10.1016/j.ijheatmasstransfer.2009.06.001
DO - 10.1016/j.ijheatmasstransfer.2009.06.001
M3 - Article
AN - SCOPUS:78751663554
VL - 52
SP - 6042
EP - 6049
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
SN - 0017-9310
IS - 25-26
ER -