scholarly journals CFD modeling of liquid film reversal of two-phase flow in vertical pipes

2019 ◽  
Vol 9 (4) ◽  
pp. 3039-3070
Author(s):  
Mohamed M. Hussein ◽  
A. Al-Sarkhi ◽  
H. M. Badr ◽  
M. A. Habib
Keyword(s):  
Liquid Film ◽  
Two Phase Flow ◽  
Cfd Modeling ◽  
Phase Flow ◽  
Two Phase

An Experimental Study on Liquid Film Dynamics and Interfacial Wave of Air-Water Two-Phase Flow in a Horizontal Channel

2013 ◽  
Author(s):  
Youjia Zhang ◽  
Weimin Ma ◽  
Shengjie Gong
Keyword(s):  
Liquid Film ◽  
Two Phase Flow ◽  
Rectangular Channel ◽  
Research Work ◽  
Water Film ◽  
Test Facility ◽  
Phase Flow ◽  
Interfacial Wave ◽  
Film Rupture ◽  
Two Phase

This study is concerned with liquid film dynamics and stability of annular flow, which plays an important role in understanding film rupture and dryout in boiling heat transfer. The research work starts from designing and making a test facility which enables the visualization and measurement of liquid film dynamics. A confocal optical sensor is applied to track the evolution of film thickness. A horizontal rectangular channel made of glass is used as the test section. Deionized water and air are supplied into that channel in such a way that an initial stratified flow forms, with the liquid film on the bottom wall. The present study is focused on characterization of liquid film profile and dynamics in term of interfacial wave and shear force induced film rupture under adiabatic condition. Based on the experimental data and analysis, it is found that given a constant water flowrate, the average thickness of water film decreases with increasing air flowrate, while the interfacial wave of the two-phase flow is intensified. As the air flowrate reaches a critical value, a localized rupture of the water film occurs.

CFD Modeling of the Fast Pyrolysis of Coal in Cold Flow Fluidized Bed

2011 ◽  
Vol 396-398 ◽  
pp. 209-212
Author(s):  
An Ning Zhou ◽  
Tie Shuan Zhang ◽  
Xiu Bin Ren ◽  
Li Zhen Zheng
Keyword(s):  
Fluidized Bed ◽  
Fluidized Beds ◽  
Two Phase Flow ◽  
Fast Pyrolysis ◽  
Cfd Modeling ◽  
Phase Flow ◽  
Two Phase ◽  
Cold Flow ◽  
Solid Phases ◽  
2D Model

Abstract. Gas-solid fluidized beds are widely applied in many industries as reactors or heat/mass transferring units because of their good heterogeneous mixing behaviors and large transferring area between the gas and solid phases. In this study, based on the Eulerian-Eulerian approach, 2D model of gas-solid flow field in fluidized bed is simulated, and the drag force models of Gidaspow and Syamlal-O’Brien have been used to simulate and analyze the two-phase flow for exploring mechanism and interaction laws of two-phase flow.

Application results of a prototype ultrasonic liquid film sensor to a 7 MPa steam–water two-phase flow experiment

2015 ◽  
Vol 53 (4) ◽  
pp. 537-545 ◽  
Author(s):  
Goro Aoyama ◽  
Kiyoshi Fujimoto ◽  
Kenichi Katono ◽  
Takuji Nagayoshi ◽  
Atsushi Baba ◽  
...  
Keyword(s):  
Liquid Film ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Film Sensor ◽  
Flow Experiment

Average liquid film thickness of annular air-water two-phase flow in 8 × 8 rod bundle

2018 ◽  
Vol 73 ◽  
pp. 63-73 ◽  
Author(s):  
Peng Ju ◽  
Xiaohong Yang ◽  
Joshua P. Schlegel ◽  
Yang Liu ◽  
Takashi Hibiki ◽  
...  
Keyword(s):  
Film Thickness ◽  
Liquid Film ◽  
Two Phase Flow ◽  
Liquid Film Thickness ◽  
Phase Flow ◽  
Two Phase ◽  
Rod Bundle
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