期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 642, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2022.128723
关键词
Core-annular flow; Two-layer; Electrokinetic flow; Energy conversion
资金
- National Natural Science Foundation of China [12102206]
- Natural Science Foundation of Inner Mongolia Autonomous Region of China [2021BS01002]
This paper theoretically investigates the electrokinetic energy conversion of core-annular flow in a slippery nanotube. The results show that the conversion efficiency can be significantly enhanced by altering the fluid properties.
In this paper, the electrokinetic energy conversion of core-annular flow (CAF) is investigated theoretically in a slippery nanotube. Two immiscible and undisturbed fluids are full of the whole nanotube, consisting of a two-layer fluid system. The core fluid is assumed to be surrounded by the annular fluid with an ideal flow pattern. Based on the Debye-Huckel linearization, the analytical expressions of flow velocity, streaming potential and electrokinetic energy conversion efficiency have been obtained. Result shows that the CAF can be enhanced obviously by the permittivity and viscosity ratios. Compared with the classical single-layer fluid system, large streaming potential strength can be obtained by altering the annular fluid property in the present two-layer fluid system. This implies that more streaming current can be obtained. Besides, as a significant application of electrokinetic flow, the optimal ratios can also be obtained in the two-layer fluid system and the conversion efficiency attains the maximum at these optimal ratios.
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