scholarly journals The Collapsing of Gas Bubbles in the Bio tissues between Two-Phase Flow and its applications under the effect of Suction Process

2017 ◽  
Vol 38 (1) ◽  
pp. 27-32
Author(s):  
S. A. Mohammadein ◽  
A. A. Megahed ◽  
Asmaa .H. A. Elhabashi
Keyword(s):  
Two Phase Flow ◽  
Gas Bubbles ◽  
Phase Flow ◽  
Two Phase

From disturbance to measurement: Application of Coriolis meter for two-phase flow with gas bubbles

2021 ◽  
Vol 79 ◽  
pp. 101892
Author(s):  
Hao Zhu ◽  
Alfred Rieder ◽  
Wolfgang Drahm ◽  
Yaoying Lin ◽  
Andreas Guettler ◽  
...  
Keyword(s):  
Two Phase Flow ◽  
Gas Bubbles ◽  
Phase Flow ◽  
Two Phase

The effect of interfacial mass transfer of slip-rising gas bubbles on two-phase flow in the vertical wellbore/pipeline

2020 ◽  
Vol 150 ◽  
pp. 119326 ◽  
Author(s):  
Hongwei Yang ◽  
Jun Li ◽  
Gonghui Liu ◽  
Xing Xing ◽  
Hailong Jiang ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Two Phase Flow ◽  
Gas Bubbles ◽  
Phase Flow ◽  
Two Phase ◽  
Interfacial Mass Transfer

scholarly journals Modeling Two-Phase Flow With Offshore Applications

2005 ◽  
Author(s):  
Rik Wemmenhove ◽  
Erwin Loots ◽  
Roel Luppes ◽  
Arthur E. P. Veldman
Keyword(s):  
Numerical Model ◽  
Gas Phase ◽  
Flow Model ◽  
Two Phase Flow ◽  
Gas Bubbles ◽  
Phase Model ◽  
Green Water ◽  
Phase Flow ◽  
Complex Flow ◽  
Two Phase

With the trend towards offshore LNG production and offloading, sloshing of LNG in partially filled tanks has become an important research subject for the offshore industry. LNG sloshing may induce impact pressures on the containment system and may affect the motions of the LNG carrier. So far, LNG sloshing has been studied mainly using model experiments with an oscillation tank. However, the development of Navier-Stokes solvers with a detailed handling of the free surface allows the numerical simulation of sloshing. It should be investigated, however, how accurate the results of this type of simulations are for this complex flow problem. The paper first presents the details of the numerical model, an improved Volume Of Fluid (iVOF) method. The program has been developed initially to study the sloshing of liquid fuel in satellites. Later, the numerical model has been used for calculations of green water loading and the analysis of anti-roll tanks, including the coupling with ship motions. Recently, the model has been extended to incorporate two-phase flow. This extension improves its ability to simulate the effect of gas bubbles of different sizes. Gas bubbles are present in virtually all relevant offshore situations; not only at LNG sloshing but also during green water events, bow slamming and water entry. In a two-phase flow model, both the liquid and the gas phase can have their own continuity and momentum equations. The handling of the compressibility of the gas phase is a major issue in the design of a two-phase flow model. However, as a first step in the modeling process, the gas phase is considered as incompressible. For a dambreak experiment, results of the one-phase model, the incompressible two-phase model and model experiment results have been compared. It is shown that the physics are more accurately simulated with the incompressible two-phase model. Furthermore, the paper will show results of the incompressible model for LNG sloshing. The physics of LNG sloshing and several other applications can be approached better by taking the compressibility into account. Therefore, as a second step, a compressible model is currently under construction, involving adiabatic compression of the gas phase.

The Effect of Gas Bubbles on the Flow Structure and Turbulence in a Downward Two-Phase Flow in a Vertical Pipe

2020 ◽  
Vol 29 (3) ◽  
pp. 414-423
Author(s):  
I. A. Evdokimenko ◽  
P. D. Lobanov ◽  
M. A. Pakhomov ◽  
V. I. Terekhov ◽  
P. K. Das
Keyword(s):  
Flow Structure ◽  
Two Phase Flow ◽  
Gas Bubbles ◽  
Phase Flow ◽  
Vertical Pipe ◽  
Two Phase

Numerical Simulation of Acoustic Streaming in Gas-Liquid Two-Phase Flow

2005 ◽  
Author(s):  
Bo Lu ◽  
Arthur E. Ruggles
Keyword(s):  
Numerical Solutions ◽  
Two Phase Flow ◽  
Bubble Radius ◽  
Acoustic Streaming ◽  
Gas Bubbles ◽  
Homogeneous Distribution ◽  
Phase Flow ◽  
Sinusoidal Vibration ◽  
Two Phase ◽  
Left Wall

Acoustic streaming phenomena pertaining to liquid-gas two-phase flow in a one-dimensional rigid duct is investigated numerically. The oscillatory bubbly flow is generated due to the sinusoidal vibration of the vertical left wall of the enclosure. Time-averaged streaming flow patterns exist in the duct as a consequence of interaction between gas bubbles and liquid which are similar to the Rayleigh-type acoustic streaming phenomena extensively investigated in single-phase flow. The liquid is treated as incompressible with a homogeneous distribution of non-condensable gas bubbles. The system is modeled with coupled nonlinear and flux-conservative partial differential equations combined with the Rayleigh-Plesset equation governing the bubble radius. The viscous interaction between bubbles and the surrounding incompressible liquid phase is the main mechanism for attenuation of the wave energy considered in this analysis. The numerical solutions are obtained by a control-volume based finite-volume Lagrangian method.

Sign in / Sign up

Export Citation Format

Share Document