A two-phase algorithm and performance bounds for the star-star concentrator location problem

1989 ◽  
Vol 37 (11) ◽  
pp. 1151-1163 ◽  
Author(s):  
C.-C. Lo ◽  
A. Kershenbaum
Keyword(s):  
Location Problem ◽  
Performance Bounds ◽  
Two Phase ◽  
Concentrator Location ◽  
And Performance

Mixing Characteristics of a Two-Phase Flow (Gas-Liquid) Microchannel Mixer

2011 ◽  
Author(s):  
Tarek Abdel-Salam ◽  
Srikanth Pidugu
Keyword(s):  
Reynolds Number ◽  
Two Phase Flow ◽  
Bubble Formation ◽  
Width Ratio ◽  
Phase Flow ◽  
Two Phase ◽  
Bubble Generation ◽  
Air Bubble ◽  
And Performance ◽  
Actual Shape

Multiphase phase flows occur in many engineering and bio-medical applications. Bubble formation in microchannels can be beneficial or harmful depending upon their influence on the operation and performance of microfludic devices. Potential uses of bubble generation found in many applications such as microreactors, micropump, and micromixers. In the present work the flow and mixing process in a passive microchannel mixer were numerically investigated. Effects of velocity, and inlet width ratio (Dgas/Dliquid) on the two phase flow were studied. Numerical results are obtained for 2-dimensional and 3-dimesional cases with a finite volume CFD code and using structured grids. Different liquid-gas Reynolds number ratios (Reliquid/Regas) were used ranging from 4 to 42. In addition, three values of the inlet width ratio (Dgas/Dliquid) were used. Results for the 3-D cases capture the actual shape of the air bubble with the thin film between the bubble and the walls. Also, increasing Reliquid increases the rate of the development of the air bubble. The bubble length increases with the increase of Dgas/Dliquid. For the same values of Re, the rate of growth of the bubble increases with the increase of Dgas/Dliquid. Finally, a correlation is provided to predict the length of the bubble with liquid-gas Reynolds number ratio (Reliquid/Regas) and tube width.

A new extended formulation with valid inequalities for the Capacitated Concentrator Location Problem

2021 ◽  
Vol 289 (3) ◽  
pp. 975-986
Author(s):  
Massimo Di Francesco ◽  
Manlio Gaudioso ◽  
Enrico Gorgone ◽  
Ishwar Murthy
Keyword(s):  
Location Problem ◽  
Valid Inequalities ◽  
Extended Formulation ◽  
Concentrator Location

A novel two-phase model for predicting the bubble formation and performance in microfluidic fuel cells

2020 ◽  
Vol 457 ◽  
pp. 228018 ◽  
Author(s):  
Tiancheng Ouyang ◽  
Jingxian Chen ◽  
Guicong Huang ◽  
Jie Lu ◽  
Chunlan Mo ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Bubble Formation ◽  
Phase Model ◽  
Two Phase ◽  
And Performance
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