scholarly journals Implementing Contact Angle Hysteresis in Moving Mesh-Based Two-Phase Flow Numerical Simulations

ACS Omega ◽  
2021 ◽  
Author(s):  
Zheren Cai ◽  
Yanlin Song
Keyword(s):  
Contact Angle ◽  
Numerical Simulations ◽  
Two Phase Flow ◽  
Contact Angle Hysteresis ◽  
Moving Mesh ◽  
Phase Flow ◽  
Two Phase

3-D numerical simulation of contact angle hysteresis for microscale two phase flow

2008 ◽  
Vol 34 (7) ◽  
pp. 690-705 ◽  
Author(s):  
Chen Fang ◽  
Carlos Hidrovo ◽  
Fu-min Wang ◽  
John Eaton ◽  
Kenneth Goodson
Keyword(s):  
Numerical Simulation ◽  
Contact Angle ◽  
Two Phase Flow ◽  
Contact Angle Hysteresis ◽  
Phase Flow ◽  
Two Phase

The effects of contact angle on two-phase flow in capillary tubes

1993 ◽  
Vol 19 (2) ◽  
pp. 337-346 ◽  
Author(s):  
A.M. Barajas ◽  
R.L. Panton
Keyword(s):  
Contact Angle ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Capillary Tubes ◽  
Two Phase

scholarly journals Mesoscopic modeling of a two-phase flow in the presence of boundaries: The contact angle

2006 ◽  
Vol 74 (2) ◽  
Author(s):  
R. Benzi ◽  
L. Biferale ◽  
M. Sbragaglia ◽  
S. Succi ◽  
F. Toschi
Keyword(s):  
Contact Angle ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Mesoscopic Modeling

Numerical Simulation for Two-Phase Flows in Fuel Cell Minichannels

2011 ◽  
Vol 8 (4) ◽  
Author(s):  
Jean-Baptiste Dupont ◽  
Dominique Legendre ◽  
Anna Maria Morgante
Keyword(s):  
Fuel Cell ◽  
Numerical Simulations ◽  
Two Phase Flow ◽  
Numerical Code ◽  
Experimental Investigations ◽  
Pressure Jump ◽  
Phase Flow ◽  
Two Phase Flows ◽  
Two Phase ◽  
Flow Configurations

This work presents direct numerical simulations of two-phase flows in fuel cell minichannels. Different two-phase flow configurations can be observed in such minichannels, which depend on gas-flow rate, liquid holdup, and wettability of each wall. These flows are known to have a significant impact on the fuel cell’s performance. The different two-phase flow configurations must be studied specially concerning the prediction of the transition among them. In the fuel cell minichannels, experimental investigations are difficult to perform because of the small size of the device and the difficult control of the wettability properties of the walls. In such systems, numerical approach can provide useful information with a perfect control of the flow characteristics, particularly for the wettability aspect. The numerical code used in this study is the JADIM code developed at IMFT, which is based on a “volume of fluid” method for interface capturing without any interface reconstruction. The numerical description of the surface tension is one of the crucial points in studying such systems where capillary effects control the phase distribution. The static and the dynamics of the triple line between the liquid, the gas, and the wall is also an essential physical mechanism to consider. The numerical implementation of this model is validated in simple situations where analytical solutions are available for the shape and the pressure jump at the interface. In this paper we present the characteristics of the JADIM code and its potential for the studies of the fuel cell internal flows. Numerical simulations on the two-phase flows on walls, in corners, and inside channels are shown.

Experimental Measurements and Numerical Simulations of Two-Phase Stratified, Wavy and Slug Flow in a Narrow Rectangular Channel

2005 ◽  
Author(s):  
Steven P. O’Halloran ◽  
B. Terry Beck ◽  
Mohammad H. Hosni ◽  
Steven J. Eckels
Keyword(s):  
Numerical Simulations ◽  
Slug Flow ◽  
Two Phase Flow ◽  
Rectangular Channel ◽  
Measurement Techniques ◽  
Narrow Channel ◽  
Experimental Measurements ◽  
Phase Flow ◽  
Two Phase ◽  
Two Fluids

Flow pattern transitions in two-phase flow are important phenomena for many different types of engineering applications, including heat exchangers. While two-phase flow is not understood as well as single-phase flow, advancements in both measurement techniques and numerical simulations are helping to increase the understanding of two-phase flow. In this paper, stratified/wavy flow is investigated, along with the transition from wavy to slug flow. For the experimental setup, a narrow channel with a length of 600 mm, height of 40 mm, and a width of 15 mm was fabricated using clear acrylic plastic, and water and air were the two fluids used for testing. The water in the channel was initially at rest, and the transition in flow patterns was created by increasing the velocity of air flowing over the water surface. Particle image velocimetry (PIV) was used to measure the velocity of the flow for stratified and wavy flow conditions, and also the velocity at the onset of slug flow. Along with the experimental measurements, computational fluid dynamics (CFD) simulations were conducted on a similar geometry using the volume of fluid (VOF) two-phase model. A commercial CFD software package was used for the simulations, and comparisons were made between the experimental measurements and numerical results. Favorable agreement was found between the experimental measurements and the numerical simulations. In particular, the transition from wavy to slug flow compared well to previously developed two-phase flow transition models, including the slug transition developed by Taitel and Dukler.

Flow Field Numerical Simulation on a Continuous Powder Surface Modifying Machine for Non-Metallic Material

2012 ◽  
Vol 246-247 ◽  
pp. 355-359
Author(s):  
Cui Ping Wu ◽  
Shui Lin Zheng ◽  
Jian Jun Luo
Keyword(s):  
Flow Field ◽  
Numerical Simulations ◽  
Two Phase Flow ◽  
Concentration Field ◽  
Flow Characteristics ◽  
Phase Flow ◽  
Mechanism Study ◽  
Two Phase ◽  
Metallic Material ◽  
Powder Surface

In order to study the two-phase flow field in the SLG continuous powder surface modifying machine for non-metallic material, which have been widely used in the powder engineering of China, a three-dimensional CFD model is developed to make the numerical simulations of the inner gas-particle flow field based on the industrial SLG-3/600 type modifying machine. By the help of the Fluent software, the gas velocity field, pressure field, particle concentration field and moving trace of the two-phase flow field are obtained. The simulation results indicate that these fields are distributed non-uniformly in the SLG modifying machine. Besides, a shortcut phenomenon is observed during the moving of the particles. The numerical simulations can not only depict the flow characteristics inside the SLG modifying machine, but also present useful reference to the mechanism study and optimal design to further improve its structure and working parameters in the future.

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