Nonlinear mass transfer and hydrodynamic stability in solubility
phenomena*
Chr. Bojadjiev
Institute of Chemical Engineering, Bulgarian Academy
of Sciences, Acad. G. Bontchev Str., Bl.103, 1113 Sofia, Bulgaria
Abstract: The dissolution of gases, liquids,or solids in liquids
is a heterogeneous reaction, and in many cases, the reaction rate is
limited by a diffusive transfer of substance in the boundary layer at
the face interphase. In modern industry, intensive interphase mass transfer
processes are accomplished by large concentration gradients. This can
result in a set of nonlinear effects and the difference between experimental
data and predictions of the linear mass transfer theory. One of the
main nonlinear effects is a result of the induction of a secondary flow
at the interface boundary. This can lead to essential changes of the
dissolution rate and the hydrodynamic stability of the system.
* Lectures presented at the 10th International Symposium
on Solubility Phenomena, Varna, Bulgaria, 22 -26 July 2002. Other
lectures are published in this issue, pp. 1785-1920.
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