Science, Space and Technology News 2024
For years, researchers have developed various models to describe a critical class of mixing effects, such as those occurring in the flow within a chemical reactor. However, experimental validation has significantly lagged behind, primarily due to the interference of gravity effects. and partners at the University of Szeged and Université libre de Bruxelles has now closed this gap with experiments conducted under weightlessness.
“Up to now, experiments to verify models of such processes have been distorted by buoyancy effects caused by density differences between the reaction solutions. In order to isolate this problem, we conducted experiments using weightlessness on board a sounding rocket. Our partners did parallel numerical simulations to show the importance of the two-dimensional effects that can’t be taken into account in simple one-dimensional models,” says Dr.
With regard to applications, however, it is important to assess the preconditions under which the various models can be used. This meant conducting experiments to isolate Taylor-Aris dispersion from other flow phenomena. On Earth, Taylor-Aris dispersion is essentially superimposed by buoyancy effects caused by gravity.
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