Identification of flow regime and estimation of volume fraction independent of liquid phase density in gas-liquid two-phase flow

2017 ◽  
Vol 98 ◽  
pp. 29-37 ◽  
Author(s):  
G.H. Roshani ◽  
E. Nazemi ◽  
M.M. Roshani
Keyword(s):  
Liquid Phase ◽  
Flow Regime ◽  
Two Phase Flow ◽  
Volume Fraction ◽  
Phase Flow ◽  
Two Phase ◽  
Phase Density

Two-phase flow regime identification based on the liquid-phase velocity information and machine learning

2020 ◽  
Vol 61 (10) ◽  
Author(s):  
Yongchao Zhang ◽  
Amirah Nabilah Azman ◽  
Ke-Wei Xu ◽  
Can Kang ◽  
Hyoung-Bum Kim
Keyword(s):  
Machine Learning ◽  
Liquid Phase ◽  
Phase Velocity ◽  
Flow Regime ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Regime Identification ◽  
Velocity Information

scholarly journals Experimental Preliminary  Analysis of the Fluid Drag Effect in Rapid and Long-runout Flowlike Landslides

2021 ◽  
Author(s):  
Yang Gao ◽  
Haoyuan Gao ◽  
Bin Li ◽  
Tongyao Wei ◽  
Zhuang Li
Keyword(s):  
Liquid Phase ◽  
Two Phase Flow ◽  
Volume Fraction ◽  
Liquid Velocity ◽  
Solid Phase ◽  
Contact Forces ◽  
Phase Flow ◽  
Long Runout ◽  
Two Phase ◽  
Frictional Forces

Abstract During a landslide, the multi-phase nature of landslide debris defines its mobility. Eventually, frictional forces cause the slide energy to dissipate, and contact forces transmit the energy into nearby material. To analyze the dynamic characteristics of high-velocity long-runout landslides, we conducted flume model tests to empirically determine the mobility characteristics of flow-like landslides with various slide materials. Our conclusions are as follows: (1) Liquid-phase flow-like landslides are highly mobility and have long runout; solid-phase flow-like landslides are highly destructive because of their higher kinetic energy; and two-phase flow-like landslides are both highly mobility. (2) During a two-phase flow-like landslide, the mobility ability of the liquid-phase material is stronger than that of the solid-phase material; when the liquid slide volume fraction is sufficiently large, the liquid phase exerts a drag force on the solid phase. (3) Various liquids exert different drag effects on the solid; the solid-liquid velocity difference and the liquid viscosity determine the drag intensity and the mobility and depositional characteristics of the landslide.

On Instabilities in Horizontal Two-Phase Flow

1994 ◽  
Vol 59 (12) ◽  
pp. 2595-2603
Author(s):  
Lothar Ebner ◽  
Marie Fialová
Keyword(s):  
Differential Equation ◽  
Flow Regime ◽  
Slug Flow ◽  
Annular Flow ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Annular Flows ◽  
Flow Regime Maps

Two regions of instabilities in horizontal two-phase flow were detected. The first was found in the transition from slug to annular flow, the second between stratified and slug flow. The existence of oscillations between the slug and annular flows can explain the differences in the limitation of the slug flow in flow regime maps proposed by different authors. Coexistence of these two regimes is similar to bistable behaviour of some differential equation solutions.

Low Bond Number Two-Phase Flow Regime Transition from Slug to Annular Wavy Flow in a Microchannel

2003 ◽  
Vol 125 (4) ◽  
pp. 544-544 ◽  
Author(s):  
Sang Young Son ◽  
Jeffrey S. Allen ◽  
Kenneth O. Kihm
Keyword(s):  
Flow Regime ◽  
Two Phase Flow ◽  
Bond Number ◽  
Phase Flow ◽  
Regime Transition ◽  
Two Phase ◽  
Flow Regime Transition

On the performance of a cascade of turbine rotor tip section blading in wet steam Part 3: Wake traverses

1997 ◽  
Vol 211 (8) ◽  
pp. 639-648 ◽  
Author(s):  
F Bakhtar ◽  
H Mashmoushy ◽  
O C Jadayel
Keyword(s):  
Liquid Phase ◽  
Two Phase Flow ◽  
Turbine Rotor ◽  
Phase Flow ◽  
Wet Steam ◽  
Flow Conditions ◽  
Two Phase ◽  
Blow Down ◽  
The Third ◽  
Phase Mixture

During the course of expansion of steam in turbines the fluid first supercools and then nucleates to become a two-phase mixture. The liquid phase consists of a large number of extremely small droplets which are difficult to generate except by nucleation. To reproduce turbine two-phase flow conditions requires a supply of supercooled vapour which can be achieved under blow-down conditions by the equipment employed. This paper is the third of a set describing an investigation into the performance of a cascade of rotor tip section profiles in wet steam and presents the results of the wake traverses.

Flow regime development analysis in adiabatic upward two-phase flow in a vertical annulus

2011 ◽  
Vol 32 (1) ◽  
pp. 164-175 ◽  
Author(s):  
J. Enrique Julia ◽  
Basar Ozar ◽  
Jae-Jun Jeong ◽  
Takashi Hibiki ◽  
Mamoru Ishii
Keyword(s):  
Flow Regime ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Vertical Annulus ◽  
Development Analysis
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