scholarly journals Development of Numerical Method for Analyzing Gas-Liquid Two-Phase Flows in Consideration of Superior Mass Conservation-Application to Numerical Analysis of Mutual Impingement Phenomenon of Liquid Droplets

2007 ◽  
Vol 42 (3) ◽  
pp. 472-479
Author(s):  
Tomoyuki Wakisaka ◽  
Yogo Takada ◽  
Toyosei Yamauchi
Keyword(s):  
Numerical Analysis ◽  
Numerical Method ◽  
Mass Conservation ◽  
Liquid Droplets ◽  
Two Phase Flows ◽  
Two Phase

Experimental and Numerical Analysis of Two-Phase Flows in Plunge Pools

2020 ◽  
Vol 146 (6) ◽  
pp. 04020044 ◽  
Author(s):  
J. M. Carrillo ◽  
L. G. Castillo ◽  
F. Marco ◽  
J. T. García
Keyword(s):  
Numerical Analysis ◽  
Two Phase Flows ◽  
Two Phase

A New Multidimensional Drift Flux Mixture Model for Gas–Liquid Droplet Two-Phase Flow

2015 ◽  
Vol 12 (04) ◽  
pp. 1540001 ◽  
Author(s):  
Zhi Shang ◽  
Jing Lou ◽  
Hongying Li
Keyword(s):  
Mixture Model ◽  
Liquid Droplet ◽  
Diffusion Flux ◽  
Water Mist ◽  
Liquid Droplets ◽  
Two Phase Flows ◽  
Two Phase ◽  
Drift Flux Model ◽  
Drift Flux ◽  
Flux Model

A new multidimensional drift flux mixture model was developed to simulate gas–liquid droplet two-phase flows. The new drift flux model was modified by considering the centrifugal force on the liquid-droplets. Therefore the traditional 1D drift flux model was upgraded to multidimension, 2D and 3D. The slip velocities between the continual phase (gas) and the dispersed phase (liquid droplets) were able to calculate through the multidimensional diffusion flux velocities based on the new modified drift flux model. Through the numerical simulations comparing with the experiments and the simulations of other models on the backward-facing step and the water mist spray two-phase flows, the new model was validated.

A robust numerical method for approximating solutions of a model of two-phase flows and its properties

2012 ◽  
Vol 219 (1) ◽  
pp. 320-344 ◽  
Author(s):  
Mai Duc Thanh ◽  
Dietmar Kröner ◽  
Christophe Chalons
Keyword(s):  
Numerical Method ◽  
Two Phase Flows ◽  
Two Phase

Formation Characteristics of Two-Phase Drops From Coaxial Nozzles

2019 ◽  
Author(s):  
Naoya Kamatani ◽  
Satoshi Ogata
Keyword(s):  
Numerical Analysis ◽  
Newtonian Fluid ◽  
Single Layer ◽  
Theoretical Expression ◽  
Liquid Droplets ◽  
Two Phase ◽  
Coaxial Nozzle ◽  
Outer Interface ◽  
Conditional Expression ◽  
Production Conditions

Abstract The purpose of this study is to clarify the formation characteristics and production conditions of two-layer droplets using coaxial nozzle. In this study, we focus on Newtonian fluid only to pay attention to the fundamental formation characteristics of two-layer droplet. Also, the three liquids flowing in the apparatus were assumed to have the same viscosity and density. First, theoretical equations concerning the outer diameters of the single layer droplet and the two-layer droplet were obtained, and a conditional expression for detaching both nozzles simultaneously from the nozzle in dripping was obtained. These theoretical equations were verified using numerical analysis. By analyzing with various parameters changed, the following six formation modes could be confirmed. 2 interface both dripping, 2 interface both jetting, Outer interface is jetting and The inner interface is dripping, 2 interface comes into contact and the encapsulated liquid is discharged to the outside, Two or more droplets are formed in the interior, Liquid droplets containing liquid droplets and liquid droplets not containing liquid droplets are alternately formed. The validity of each theoretical expression and conditional expression was also be confirmed.

A volume-amending method to improve mass conservation of level set approach for incompressible two-phase flows

2008 ◽  
Vol 51 (11) ◽  
pp. 1132-1140 ◽  
Author(s):  
XiangYang Li ◽  
YueFa Wang ◽  
GengZhi Yu ◽  
Chao Yang ◽  
ZaiSha Mao
Keyword(s):  
Level Set ◽  
Mass Conservation ◽  
Two Phase Flows ◽  
Two Phase ◽  
Level Set Approach

A Pressure-Base One-Fluid Compressible Formulation for High Speed Two-Phase Flows With Heat and Mass Transfer

2018 ◽  
Vol 140 (8) ◽  
Author(s):  
Yan Luo ◽  
Jianqiu Zhou ◽  
Xia Yang ◽  
Zhanxiang Jiang
Keyword(s):  
Numerical Method ◽  
High Speed ◽  
Immiscible Fluids ◽  
Numerical Results ◽  
Cavitating Flows ◽  
Two Phase Flows ◽  
Two Phase ◽  
Two Phases ◽  
Locally Homogeneous ◽  
Homogeneous Media

This paper presents a numerical method for high-speed compressible cavitating flows. The method is derived from one-fluid formulation in a sense that the two phases are well mixed and the mixture is considered as a locally homogeneous media. Energy equation is solved to predict the temperature evolution which is then used together with pressure to update the density field. A volume of fluid (VOF) phase-fraction based interface capturing approach is used to capture the phase front between the two immiscible fluids. The derived formulations have been implemented into a pressure-based, segregated algebraic semi-implicit compressible solver in Openfoam, which can be used to solve for high-speed compressible two-phase flows involving phase changing. Numerical examples include the cavitating flows induced by an ultrasonic oscillating horn with and without a counter sample. The numerical results by the proposed method are validated against the published experimental data as well as numerical results and good agreements have been obtained. Our calculation demonstrates that the proposed numerical method is applicable to the study of high-speed two phase flows with phase transition and wave propagation, such as shock waves induced by the collapse of the cavitation bubbles.

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