scholarly journals Modeling of bubble growth dynamics and nonisothermal expansion in starch-based foams during extrusion

2005 ◽  
Vol 24 (1) ◽  
pp. 29-45 ◽  
Author(s):  
Lijun Wang ◽  
Girish M. Ganjyal ◽  
David D. Jones ◽  
Curtis L. Weller ◽  
Milford A. Hanna
Keyword(s):  
Bubble Growth ◽  
Growth Dynamics

Vapor and Gas-Bubble Growth Dynamics around Laser-Irradiated, Water-Immersed Plasmonic Nanoparticles

ACS Nano ◽  
2017 ◽  
Vol 11 (2) ◽  
pp. 2045-2051 ◽  
Author(s):  
Yuliang Wang ◽  
Mikhail E. Zaytsev ◽  
Hai Le The ◽  
Jan C. T. Eijkel ◽  
Harold J. W. Zandvliet ◽  
...  
Keyword(s):  
Bubble Growth ◽  
Growth Dynamics ◽  
Plasmonic Nanoparticles ◽  
Gas Bubble

Modeling Diffusion-Induced Bubble Growth in Polymer Liquids

2003 ◽  
Vol 22 (2) ◽  
pp. 89-102 ◽  
Author(s):  
David C. Venerus
Keyword(s):  
Bubble Growth ◽  
Growth Dynamics ◽  
Growth Behavior ◽  
Liquid Viscosity ◽  
Transport Models ◽  
Blowing Agent ◽  
Polymer Foaming ◽  
Polymer Liquids ◽  
Complex Phenomena

Accurate modeling of diffusion-induced bubble growth is essential for the development of efficient polymer foaming processes. Consequently, a large number of transport models of this complex phenomena have been formulated. In most previous studies, one or more simplifying approximations have been invoked to reduce mathematical complexity. In this paper, we present and compare several models of bubble growth in liquids and examine the effects blowing agent concentration, liquid viscosity and elasticity on bubble growth dynamics. In addition, we compare predicted and measured bubble growth behavior in two polymer foaming systems.

scholarly journals Dynamics of bubble growth during boiling at microgravity

2021 ◽  
Vol 2119 (1) ◽  
pp. 012170
Author(s):  
F Ronshin ◽  
A Sielaff ◽  
L Tadrist ◽  
P Stephan ◽  
O Kabov
Keyword(s):  
Heat Transfer ◽  
Bubble Growth ◽  
Boiling Heat Transfer ◽  
Bubble Dynamics ◽  
Heated Surface ◽  
Space Station ◽  
Growth Dynamics ◽  
Special Focus ◽  
Transfer Processes ◽  
Microgravity Conditions

Abstract The purpose of this investigation is to study the mechanisms of boiling heat transfer in microgravity conditions. The RUBI (Reference mUltiscale Boiling Investigation) is an experiment where the basic phenomena of boiling heat transfer processes on a heated surface are investigated on the ISS (International Space Station). The special focus is paid to the coupling of macroscopic bubble dynamics from nucleation, growth and detachment combined with the microscopic phenomena in the thin films and micro layers on the heater, underneath the boiling bubbles. The image treatment program has been developed in order to extract the bubble volume as well as the contact angle from the experimental images. The first data of the bubble growth dynamics have been obtained and analysed.

Computational and Experimental Characterization of Single Bubble Dynamics in Isothermal Liquid Pools

2007 ◽  
Author(s):  
A. Subramani ◽  
S. K. Kasimsetty ◽  
R. M. Manglik ◽  
M. A. Jog
Keyword(s):  
Surface Tension ◽  
Bubble Growth ◽  
High Speed ◽  
Bubble Dynamics ◽  
Great Influence ◽  
Growth Dynamics ◽  
Equivalent Diameter ◽  
Parametric Effects ◽  
Liquid Pools ◽  
Visualization Techniques

The process of bubble growth is of great influence on the bubble volume and bubble rise velocity. The overall behavior of bubbles at fluid interfaces depends strongly on bubble growth and the closely linked process of bubble detachment. In the present study, the dynamics of a single gas bubble emanating from an orifice submerged in isothermal liquid pools is investigated computationally and experimentally. The parametric effects of liquid properties, capillary diameters and air flow rates on the bubble shape, equivalent diameter, and growth times on the dynamic behavior (incipience, growth and necking) of air bubbles, in fluids of varying surface tension and viscosity, as it grows from a tip of a sub-millimeter-scale capillary orifice have been studied. Computational solutions have been obtained by solving the complete set of governing equations using Volume of Fluid (VOF) interface tracking method. The CFD model has been verified experimentally using optical high speed micro-scale flow visualization techniques. The results were analyzed in a theoretical stand point considering the various forces acting on the bubble such as forces due to buoyancy, viscosity, surface tension, liquid inertia, and gas momentum transport, and the consequent motion of the gas-liquid interface. The results obtained ascertain the role of liquid-gas interfacial forces as well as the fluid properties on the bubble growth dynamics.

scholarly journals Operator learning for predicting multiscale bubble growth dynamics

2021 ◽  
Vol 154 (10) ◽  
pp. 104118
Author(s):  
Chensen Lin ◽  
Zhen Li ◽  
Lu Lu ◽  
Shengze Cai ◽  
Martin Maxey ◽  
...  
Keyword(s):  
Bubble Growth ◽  
Growth Dynamics

scholarly journals Dynamics of bubble growth under a heated substrate

2021 ◽  
Vol 2119 (1) ◽  
pp. 012134
Author(s):  
D Y Kochkin ◽  
A S Mungalov ◽  
I A Derevyannikov
Keyword(s):  
Bubble Growth ◽  
Buoyancy Force ◽  
Bubble Dynamics ◽  
Bubble Diameter ◽  
Growth Dynamics ◽  
Heating Power ◽  
Gas Bubble ◽  
Shadow Method ◽  
Heated Substrate ◽  
Heating Plate

Abstract This paper investigates the growth dynamics of a vapor-gas bubble pressed against a heating plate by the buoyancy force. The shadow method was used to capture images, which were then automatically processed to calculate the size of the bubble. As expected, the bubble dynamics significantly depends on the heating power. It was found that the ratio of bubble diameter to bubble height increases as it grows.

Numerical simulation of polypropylene foaming process assisted by carbon dioxide: Bubble growth dynamics and stability

2011 ◽  
Vol 66 (16) ◽  
pp. 3656-3665 ◽  
Author(s):  
Yan Li ◽  
Zhen Yao ◽  
Zhen-hua Chen ◽  
Kun Cao ◽  
Shao-long Qiu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Numerical Simulation ◽  
Bubble Growth ◽  
Growth Dynamics ◽  
Foaming Process
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