Efficient Bubble Transport on Bioinspired Topological Ultraslippery Surfaces

2021 ◽  
Author(s):  
Kai Zhuang ◽  
Xiaolong Yang ◽  
Wei Huang ◽  
Qingwen Dai ◽  
Xiaolei Wang
Keyword(s):  
Bubble Transport

An Assessment of Computational Fluid Dynamics Cavitation Models Using Bubble Growth Theory and Bubble Transport Modeling

2019 ◽  
Vol 141 (4) ◽  
Author(s):  
Michael P. Kinzel ◽  
Jules W. Lindau ◽  
Robert F. Kunz
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Analytic Solutions ◽  
Cfd Modeling ◽  
Computational Time ◽  
Cavitation Model ◽  
Modeling Framework ◽  
Homogeneous Models ◽  
Bubble Transport ◽  
Computational Fluid Dynamics Cfd

This effort investigates advancing cavitation modeling relevant to computational fluid dynamics (CFD) through two strategies. The first aims to reformulate the cavitation models and the second explores adding liquid–vapor slippage effects. The first aspect of the paper revisits cavitation model formulations with respect to the Rayleigh–Plesset equation (RPE). The present approach reformulates the cavitation model using analytic solutions to the RPE. The benefit of this reformulation is displayed by maintaining model sensitivities similar to RPE, whereas the standard models fail these tests. In addition, the model approach is extended beyond standard homogeneous models, to a two-fluid modeling framework that explicitly models the slippage between cavitation bubbles and the liquid. The results indicate a significant impact of slip on the predicted cavitation solution, suggesting that the inclusion of such modeling can potentially improve CFD cavitation models. Overall, the results of this effort point to various aspects that may be considered in future CFD-modeling efforts with the goal of improving the model accuracy and reducing computational time.

Planar plunge-zone flow patterns and entrained bubble transport

1989 ◽  
Vol 27 (3) ◽  
pp. 363-383 ◽  
Author(s):  
K. J. Sene ◽  
N. H. Thomas ◽  
B. T. Goldring
Keyword(s):  
Flow Patterns ◽  
Bubble Transport

Generation and Transport of Bubbles in a Microfluidic Device

2008 ◽  
Author(s):  
Renqiang Xiong ◽  
Jacob N. Chung
Keyword(s):  
Silicon Wafer ◽  
Microfluidic Device ◽  
High Speed ◽  
Micro Channel ◽  
Bubble Generation ◽  
Air Bubble ◽  
Micro Scale ◽  
Bubble Transport

In this paper we used high speed recording to characterize segmented micro-scale air bubble generation in a T-junction and bubble transport in a serpentine micro-channel fabricated in a standard silicon wafer.

Bubble transport theory with application to the upper ocean

1973 ◽  
Vol 59 (1) ◽  
pp. 187-206 ◽  
Author(s):  
G. A. Garrettson
Keyword(s):  
Bubble Dynamics ◽  
Transport Theory ◽  
Gas Diffusion ◽  
Ocean Model ◽  
Upper Ocean ◽  
General Description ◽  
Source Mechanisms ◽  
Bubble Transport ◽  
Single Bubble Dynamics ◽  
Moving Fluid

The formalism of transport theory is adapted to a general description of bubble populations in a moving fluid. The bubble distribution, as a function of position, velocity, radius and time, satisfies a Boltzmann-type transport equation that is derived and then formally solved by the method of characteristics. In order to apply this new analytical tool to the specific problem of gas bubble transport in the upper ocean, an ocean model and a bubble dynamics model must be chosen. For the purpose of illustration, explicit solutions are written, for distributed sources in a stationary ocean with simple expressions for bubble gas diffusion and drag. Calculated results clarify the relations between observed bubble distributions at sea, proposed bubble source mechanisms and known models of single-bubble dynamics.

A numerical framework for bubble transport in a subcooled fluid flow

2017 ◽  
Vol 345 ◽  
pp. 373-403 ◽  
Author(s):  
Klas Jareteg ◽  
Srdjan Sasic ◽  
Paolo Vinai ◽  
Christophe Demazière
Keyword(s):  
Fluid Flow ◽  
Bubble Transport

A Note on Radionuclide Transport by Gas Bubbles

1996 ◽  
Vol 465 ◽  
Author(s):  
Ivars Neretnieks ◽  
Märta-Lena Ernstson
Keyword(s):  
Carrying Capacity ◽  
Colloidal Particles ◽  
Spent Nuclear Fuel ◽  
Near Field ◽  
Ground Surface ◽  
Gas Bubbles ◽  
Escape Rate ◽  
Fuel Gas ◽  
Buffer Material ◽  
Bubble Transport

ABSTRACTIn a repository for spent nuclear fuel, gas generated by corrosion of the iron in the canister may form small bubbles that will escape and rise to the ground surface. Colloidal particles may attach to the surface of the bubbles and be carried by them. If the colloids are supplied by the montmorillonite clay of the buffer material surrounding the canister, the clay can be carried away. Nuclides sorbed in the clay can be carried with the bubbles. We have estimated the carrying capacity of the gas of the clay particles and the escape rate of nuclides carried by the gas bubbles. The latter is also compared to the escape rate by the conventional escape mechanisms from the near field. We have further estimated the detachment of the nuclides from the clay and their sorption onto the fracture surfaces of the rock as well as their uptake by diffusion into the rock matrix along the bubble transport paths.The present paper is speculative and uses some hypothetical assumptions. Although the processes that are modelled are known to exist there is not enough known of several of them to quantify them accurately. The carrying capacity of the gas used in the calculations is an upper bound and probably very much exaggerated. Even so, the consequences are minor for the release of radionuclides.

Superhydrophobic helix: controllable and directional bubble transport in an aqueous environment

2016 ◽  
Vol 4 (43) ◽  
pp. 16865-16870 ◽  
Author(s):  
Cunming Yu ◽  
Xuanbo Zhu ◽  
Moyuan Cao ◽  
Cunlong Yu ◽  
Kan Li ◽  
...  
Keyword(s):  
Aqueous Environment ◽  
Bubble Transport

Bubble transport in three-dimensional laminar gravity-driven flow – mathematical formulation

2004 ◽  
Vol 336 (2) ◽  
pp. 71-83 ◽  
Author(s):  
Laurent Pilon ◽  
Andrei G. Fedorov ◽  
D. Ramkrishna ◽  
Raymond Viskanta
Keyword(s):  
Mathematical Formulation ◽  
Three Dimensional ◽  
Gravity Driven ◽  
Bubble Transport ◽  
Gravity Driven Flow
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