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- Title
Numerical simulation and experimental study of liquid–liquid flow dispersion in conical spiral pipes.
- Authors
Zhang, Ting; Guo, Kai; Liu, Chunjiang; Feng, Aiguo; Cai, Hongwei; Ren, Siyuan
- Abstract
Highlights • Flow patterns of oil–water two-phase flow in conical spiral pipe are identified. • Effects of operating condition and pipe geometry structure on separation are studied. • Increasing the pipe surface roughness is beneficial to oil–water separation. • Pipe with Graphene-coating surface enhances the de-oiling under high inlet velocity. Abstract This paper presents the numerical simulation and experimental study of an immiscible liquid–liquid flow dispersion in conical spiral pipes for oil–water separation. Flow patterns of oil–water flow in the pipe are identified. The flow characteristics such as pressure drop, cross sectional phase distribution, and outlet flow rate are obtained. In addition to flow behavior, separation performance of the conical spiral pipes is examined under different operating conditions. The effects of geometric parameters such as conical angle, pipe diameter, pitch height, and outlet split ratio, on oil–water separation are revealed. Moreover, the effects of inlet velocity, inlet oil concentration, and operating temperature on the separation are obtained. In addition, it has shown that surface treatment for the conical spiral pipes has an impact on the oil–water separation. In particular, the V-shaped sawtooth surface microstructure can enhance the oil–water separation, and Graphene-coated surface exhibits good separation capacity under high flow velocity.
- Subjects
OIL-water interfaces; COMPUTER simulation of two-phase flow; PIPE flow; GRAPHENE; COMPUTATIONAL fluid dynamics
- Publication
Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A, 2018, Vol 138, p374
- ISSN
0263-8762
- Publication type
Article
- DOI
10.1016/j.cherd.2018.09.005