Entrainment in multifluid systems, and rotation induced occurrences

Fluid entrainment is a complex and deeply attractive phenomenon that is frequently encountered in both industry and nature. In general, entrainment deals with the basic understanding of penetration one fluid into another which leads to occurrence of complex interfacial structure. The present article addresses a detailed description of the recent studies on entrainment dynamics caused by the external rotational flux across the interfaces is elaborated. Despite of considerable progress in understanding rotation induced entrainment, there are still several questions unanswered due to its difficulty, unpredictability, three-dimensional effects, and chaotic nature. Therefore, here we explained numerous numerical, experimental, and analytical investigations with their relevance in engineering applications wherein the increase of interfacial area causes enhancement of heat and mass transfer. The description also includes various patterns of entrained fluid entities due to rotations induced across the interface. Furthermore, the entrainment behaviors have been critically analyzed to draw out the distinct categorization of rollers relying on parameters such as submergence ratio with different gas-liquid pairs. (C) 2022 Elsevier Masson SAS. All rights reserved.

Automated summary

This article provides a detailed description of recent studies on entrainment dynamics caused by external rotational flux across interfaces. Despite significant progress in understanding rotation-induced entrainment, there are still several unanswered questions.