期刊
EXPERIMENTAL THERMAL AND FLUID SCIENCE
卷 81, 期 -, 页码 265-276出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.expthermflusci.2016.10.023
关键词
Double emulsion; High speed imaging; Image analysis; Drop diameter; Flow regime; Electric field
资金
- School of Chemical Engineering, University of Birmingham, UK
- EPSRC [EP/L505766/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/L505766/1] Funding Source: researchfish
A novel approach to create O/W/O is developed and described to achieve uniform oil drop size coated with thin layers of water. Drops were created using a test cell where the DC field is applied between different internal diameter (ID) needles (from which the O/W emulsion emits upwards into a continuous oil phase) and a grounded metal ring which was located at selected distances from the needle top. The advantages compared to the previous techniques consist of possibility of control on drop size and coating layer of the water using low electric field. A high speed imaging technique has been applied to determine drop size under different flow and electric field conditions. Without the electric field, several flow regimes were observed; stable formation of both the O/W/O emulsion and the O/W emulsion upstream of the cell was possible over a range of Reynolds numbers from 80 to 100. The effect of the electric field was found to be reverse below electric field strength of 60 kV m(-1), beyond this critical value there was significant impact upon the flow regime, drop size and emulsion structure. The impact of the electric field strength upon flow pattern and emulsion structure and a quantitative analysis of droplet size are presented. The work shows the results for the controlled creation of complex emulsion droplets combining electric field and mm scale channels. The differences with the other physical processes reported in the literature are discussed. (C) 2016 The Authors. Published by Elsevier Inc.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据