Influence of Gravity on Atomic Mobility in a Liquid
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Published:2022-09-13
Issue:5
Volume:34
Page:
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ISSN:1875-0494
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Container-title:Microgravity Science and Technology
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language:en
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Short-container-title:Microgravity Sci. Technol.
Author:
Sondermann Elke,Voigtmann Thomas,Meyer Andreas
Abstract
AbstractMeasurements of diffusion and thermodiffusion in liquids are very sensitive to convection caused for example by buoyancy. To reduce the impact of buoyancy-driven convection, benchmark experiments are performed in microgravity conditions. Here, we discuss the general influence of gravity on atomic mobility. The gravitational Péclet number and the gravitational length can be used to assess this influence. They show that the diffusion processes of atoms in a liquid is not affected by Earth’s gravitational force but that the process is dominated by the thermal energy of the atoms. Data from experiments under different gravity conditions ranging from $$10^{-5}g$$
10
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5
g
to $$10^6g$$
10
6
g
are summarized. They confirm that interdiffusion is only influenced by accelerations that are orders of magnitude larger than Earth’s gravity.
Funder
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
Publisher
Springer Science and Business Media LLC
Subject
Applied Mathematics,General Physics and Astronomy,General Engineering,Modeling and Simulation
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