Diffusion Coefficient Measurements Under Reduced Gravity Conditions by Means of the Shear Cell Technique. The Impact of Free Surfaces |
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Authors: | Xavier Ruiz Jordi Pallarés |
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Affiliation: | (1) Department of Mechanical and Manufacturing Engineering, University of Manitoba, 75 A Chancellors Circle, Winnipeg, MB, R3T 5V6, Canada; |
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Abstract: | A recent computational methodology is applied here in order to analyze the impact of free surfaces on the measurement of the
interdiffusion coefficients if shear cells are used. Calculations indicate that the above-mentioned impact depends on the
intensity of the solutal Marangoni convection but mainly on the number of active Marangoni segments, that is to say, on the
extent of the free surface considered. Bulk solutal convection due to reduced gravity levels is not relevant if the gravity
vector acts orthogonally to the gradient of concentration. |
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Keywords: | |
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