Experimental and numerical studies of liquid-liquid slug flows in micro channels with Y-junction inlets

2021 ◽  
pp. 117289
Author(s):  
Li Lei ◽  
Yuting Zhao ◽  
Xinyu Wang ◽  
Gongming Xin ◽  
Jingzhi Zhang
Keyword(s):  
Liquid Slug ◽  
Numerical Studies ◽  
Micro Channels ◽  
Slug Flows

Numerical Studies on Non-Boiling Two-Phase Flows in Microtubes and Microchannels: A Review

2010 ◽  
Author(s):  
V. Talimi ◽  
Y. S. Muzychka
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Flow Pattern ◽  
Research Literature ◽  
Heat Transfer Characteristics ◽  
Liquid Slug ◽  
Two Phase Flows ◽  
Two Phase ◽  
Numerical Studies ◽  
Slug Flows

Numerical studies on the hydrodynamic and heat transfer characteristics of two-phase flows in small tubes and channels are reviewed. These flows are gas-liquid and liquid-liquid slug flows. The review is categorized into two groups of studies: circular and non-circular channels. Different aspects such as slug formation, slug shape, flow pattern, pressure drop and heat transfer are of interest. According to this review, there are some large gaps in the research literature, including pressure drop and heat transfer in liquid-liquid slug flows. Gaps in research are also found in applications of non-circular ducts, pressure drop and heat transfer in meandering microtubes and microchannels for both of gas-liquid and liquid-liquid two-phase flows.

scholarly journals Hydrodynamics of Gas–Liquid Slug Flows in a Long In-Plane Spiral Shaped Milli-Reactor

2020 ◽  
Vol 54 (1) ◽  
pp. 25-47 ◽  
Author(s):  
Mei Mei ◽  
Francisco Felis ◽  
Gilles Hébrard ◽  
Nicolas Dietrich ◽  
Karine Loubière
Keyword(s):  
Liquid Slug ◽  
Slug Flows ◽  
Plane Spiral

A device for continuous and flexible adjustment of liquid-liquid slug size in micro-channels

2020 ◽  
Vol 10 (2) ◽  
pp. 409-422 ◽  
Author(s):  
Linda Arsenjuk ◽  
Moritz Asshoff ◽  
Johannes Kleinheider ◽  
David W. Agar
Keyword(s):  
Liquid Slug ◽  
Micro Channels

Numerical Simulation of Two-Phase Slug Flows in Microchannels

2009 ◽  
Author(s):  
A. Mehdizadeh ◽  
S. A. Sherif ◽  
W. E. Lear
Keyword(s):  
Surface Tension ◽  
Slug Flow ◽  
Stokes Equations ◽  
Pressure Fluctuations ◽  
Water Interface ◽  
Liquid Slug ◽  
Complex Flow ◽  
Two Phase ◽  
Air Water Interface ◽  
Slug Flows

In this paper the Navier-stokes equations for a single liquid slug have been solved in order to predict the circulation patterns within the slug. Surface tension effects on the air-water interface have been investigated by solving the Young–Laplace equation. The calculated interface shape has been utilized to define the liquid slug geometry at the front and tail interfaces of the slug. Then the effects of the surface tension on the hydrodynamics of the two-phase slug flow have been compared to those where no surface tension forces exist. The importance of the complex flow field features in the vicinity of the two interfaces has been investigated by defining a non-dimensional form of the wall shear stress. The latter quantity has been formulated based on non-dimensional parameters in order to define a general Moody friction factor for typical two-phase slug flows in microchannels. Moreover, the hydrodynamics of slug flow formation has been examined using computational fluid dynamics (CFD). The volume-of-fluid (VOF) method has been applied to monitor the growth of the instability at the air-water interface. The lengths of the slugs have been correlated to the pressure fluctuations in the mixing region of the air and water streams at an axisymmetric T-junction. The main frequencies of the pressure fluctuations have been investigated using the Fast Fourier Transform (FFT) method.

An Investigation on Deformation-Based Micro Surface Texturing

2011 ◽  
Author(s):  
Rui Zhou ◽  
Jian Cao ◽  
Kornel Ehmann ◽  
Chun Xu
Keyword(s):  
Sheet Material ◽  
Thin Sheet ◽  
Surface Texturing ◽  
Channel Depth ◽  
Surface Textures ◽  
Numerical Studies ◽  
Micro Channels ◽  
Thin Sheet Material ◽  
Wear Reduction ◽  
Final Profile

Micro surface textures have various applications, such as friction/wear reduction and bacteria sterilization. Deformation-based micro surface texturing has the potential of economically creating micro surface textures over a large surface area. A novel desktop micro surface texturing system is proposed for efficiently and economically fabricating micro channels on the surface of thin sheet material for micro fluid and friction/wear reduction applications. Both experimental and numerical studies were employed to analyze the problems of the flatness of the textured sheet, the uniform of the channel depth and pile-ups built up during the micro surface texturing process. The results demonstrated a clear relationship between relative velocity of the upper and lower rolls and the flatness of the textured sheet and the final profile of the micro channels.

Heat transfer model for gas–liquid slug flows under constant flux

2010 ◽  
Vol 53 (15-16) ◽  
pp. 3193-3201 ◽  
Author(s):  
Patrick A. Walsh ◽  
Edmond J. Walsh ◽  
Yuri S. Muzychka
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Liquid Slug ◽  
Constant Flux ◽  
Slug Flows
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