scholarly journals Mass Transfer Analysis in PEFC Diffusion Layer by Lattice Gas Automata Method

2006 ◽  
Vol 49 (3) ◽  
pp. 653-659 ◽  
Author(s):  
Takashi YOSHIMOTO ◽  
Yosuke MATSUKUMA ◽  
Gen INOUE ◽  
Masaki MINEMOTO
Keyword(s):  
Mass Transfer ◽  
Diffusion Layer ◽  
Lattice Gas ◽  
Lattice Gas Automata

scholarly journals Mass Transfer Analysis in PEFC Diffusion Layer by Lattice Gas Automata Method

2005 ◽  
Vol 71 (711) ◽  
pp. 2642-2648
Author(s):  
Takashi YOSHIMOTO ◽  
Yosuke MATSUKUMA ◽  
Gen INOUE ◽  
Masaki MINEMOTO
Keyword(s):  
Mass Transfer ◽  
Diffusion Layer ◽  
Lattice Gas ◽  
Lattice Gas Automata

Dynamic behavior of multirobot systems using lattice gas automata

1999 ◽  
Author(s):  
Keith M. Stantz ◽  
Stewart M. Cameron ◽  
Rush D. Robinett III ◽  
Michael W. Trahan ◽  
John S. Wagner
Keyword(s):  
Dynamic Behavior ◽  
Lattice Gas ◽  
Multirobot Systems ◽  
Lattice Gas Automata

Effects of Schmidt Number on Turbulent Mass Transfer Around a Rotating Circular Cylinder

2011 ◽  
Vol 133 (8) ◽  
Author(s):  
Dong-Hyeog Yoon ◽  
Kyung-Soo Yang ◽  
Klaus Bremhorst
Keyword(s):  
Mass Transfer ◽  
Circular Cylinder ◽  
Diffusion Layer ◽  
Time Scale ◽  
Schmidt Number ◽  
Concentration Field ◽  
Limiting Behavior ◽  
Rotating Circular Cylinder ◽  
Scale Ratio ◽  
Turbulent Mass Transfer

Characteristics of turbulent mass transfer around a rotating circular cylinder have been investigated by Direct Numerical Simulation. The concentration field was computed for three different cases of Schmidt number, Sc = 1, 10 and 100 at ReR* = 336. Our results confirm that the thickness of the Nernst diffusion layer decreases as Sc increases. Wall-limiting behavior within the diffusion layer was examined and compared with that of channel flow. Concentration fluctuation time scale was found to scale with r+2, while the time scale ratio nearly equals the Schmidt number throughout the diffusion layer. Scalar modeling closure constants based on gradient diffusion models were found to vary considerably within the diffusion layer. Results of an octant analysis show the significant role played by the ejection and sweep events just as is found for flat plate, channel, and pipe flow boundary layers. Turbulence budgets revealed a strong Sc dependence of turbulent scalar transport.

Density waves of granular flow in a pipe using lattice-gas automata

1994 ◽  
Vol 49 (3) ◽  
pp. R1796-R1799 ◽  
Author(s):  
Gongwen Peng ◽  
Hans J. Herrmann
Keyword(s):  
Granular Flow ◽  
Lattice Gas ◽  
Density Waves ◽  
Lattice Gas Automata

Electrochemical Removal of Copper and Lead from Industrial Wastewater: Mass Transport Enhancement

2009 ◽  
Vol 44 (2) ◽  
pp. 183-188 ◽  
Author(s):  
Asim Yaqub ◽  
Huma Ajab ◽  
Saqib Khan ◽  
Sajjad Khan ◽  
Robina Farooq
Keyword(s):  
Mass Transfer ◽  
Energy Consumption ◽  
Mass Transport ◽  
Diffusion Layer ◽  
Industrial Wastewater ◽  
Lead Nitrate ◽  
Electrochemical Treatment ◽  
Bulk Solution ◽  
Metallic Ions ◽  
Mass Transport Process

Abstract The effects of ultrasonic frequencies on both the mass transport process and diffusion layer were investigated during electrochemical treatment. The rates of mass transfer at a stainless steel cathode were measured for copper and lead in dilute acidified copper sulphate and lead nitrate solutions at different ultrasonic frequencies. Concentrations in bulk solution were determined by atomic absorption spectrophotometer. By increasing frequencies from 40 to 100 kHz, a high value for the mass transfer coefficient and an effective thinning of the diffusion layer were observed. Higher rates of mass transfer reduced energy consumption. Use of ultrasound with electrochemical processes can provide valuable contributions to remove metallic ions from industrial wastewater without using extra chemicals. The process has efficiently reduced the cost of energy consumption and deposition time.

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