Mass Transfer at a Microelectrode in Channel Flow

1996 ◽  
Vol 100 (22) ◽  
pp. 9462-9464 ◽  
Author(s):  
Wendy Zhang ◽  
H. A. Stone ◽  
J. D. Sherwood
Keyword(s):  
Mass Transfer ◽  
Channel Flow

Water droplet condensation and evaporation in turbulent channel flow

2014 ◽  
Vol 749 ◽  
pp. 666-700 ◽  
Author(s):  
E. Russo ◽  
J. G. M. Kuerten ◽  
C. W. M. van der Geld ◽  
B. J. Geurts
Keyword(s):  
Mass Transfer ◽  
Nusselt Number ◽  
Size Distribution ◽  
Water Vapour ◽  
Channel Flow ◽  
Droplet Size ◽  
Droplet Size Distribution ◽  
Turbulent Channel Flow ◽  
Phase Changes ◽  
Cold Wall

AbstractWe propose a point-particle model for two-way coupling of water droplets dispersed in the turbulent flow of a carrier gas consisting of air and water vapour. We adopt an Euler–Lagrangian formulation based on conservation laws for the mass, momentum and energy of the continuous phase and on empirical correlations describing momentum, heat and mass transfer between the droplet phase and the carrier gas phase. An incompressible flow formulation is applied for direct numerical simulation of differentially heated turbulent channel flow. The two-way coupling is investigated in terms of its effects on mass and heat transfer characteristics and the resulting droplet size distribution. Compared to simulations without droplets or those with solid particles with the same size and specific heat as the water droplets, a significant increase in Nusselt number is found, arising from the additional phase changes. The Nusselt number increases with increasing ambient temperature and is almost independent of the heat flux applied to the walls of the channel. The time-averaged droplet size distribution displays a characteristic dependence on position expressing the combined effect of turbophoresis and phase changes in turbulent wall-bounded flow. In the statistically steady state that is reached after a long time, the resulting flow exhibits a mean motion of water vapour from the warm wall to the cold wall, where it condenses on average, followed by a net mean mass transfer of droplets from the cold wall to the warm wall.

scholarly journals Interferometric Observation of Turbulent Mass Transfer in Channel Flow

1985 ◽  
Vol 132 (7) ◽  
pp. 1627-1634 ◽  
Author(s):  
F. R. McLarnon ◽  
R. H. Muller ◽  
C. W. Tobias
Keyword(s):  
Mass Transfer ◽  
Channel Flow ◽  
Interferometric Observation ◽  
Turbulent Mass Transfer

scholarly journals On Computations for Thermal Radiation in MHD Channel Flow with Heat and Mass Transfer

PLoS ONE ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. e86695 ◽  
Author(s):  
T. Hayat ◽  
M. Awais ◽  
A. Alsaedi ◽  
Ambreen Safdar
Keyword(s):  
Mass Transfer ◽  
Thermal Radiation ◽  
Heat And Mass Transfer ◽  
Channel Flow ◽  
Mhd Channel

Heat and Mass Transfer Caused by a Laminar Channel Flow Equipped With a Synthetic Jet Array

2010 ◽  
Author(s):  
Zdeneˇk Tra´vni´cˇek ◽  
Petra Dancˇova´ ◽  
Jozef Kordik ◽  
Toma´sˇ Vit ◽  
Miroslav Pavelka
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Reynolds Number ◽  
Heat Transfer Enhancement ◽  
Channel Flow ◽  
Heat Mass Transfer ◽  
Low Reynolds Number ◽  
Transfer Enhancement ◽  
Laminar Channel Flow ◽  
Low Reynolds

Low-Reynolds-number laminar channel flow is used in various heat/mass transfer applications, such as cooling and mixing. A low Reynolds number implies a low intensity of heat/mass transfer processes, since they rely only on the gradient diffusion. To enhance these processes, an active flow control by means of synthetic (zero-net-mass-flux) jets is proposed. This arrangement can be promising foremost in microscale. The present study is experimental in which a Reynolds number range of 200–500 is investigated. Measurement was performed mainly in air as the working fluid by means of hot-wire anemometry and the naphthalene sublimation technique. PIV experiments in water are also discussed. The experiments were performed in macroscale at the channel cross-section (20×100)mm and (40×200)mm in air and water, respectively. The results show that the low Reynolds number channel flow can be actuated by an array of synthetic jets, operating near the resonance frequency. The control effect of actuation and the heat transfer enhancement was quantified. The stagnation Nusselt number was enhanced by 10–30 times in comparison with the non-actuated channel flow. The results indicate that the present arrangement can be a useful tool for heat transfer enhancement in various applications, e.g., cooling and mixing.

scholarly journals Twente mass and heat transfer water tunnel: Temperature controlled turbulent multiphase channel flow with heat and mass transfer

2019 ◽  
Vol 90 (7) ◽  
pp. 075117
Author(s):  
Biljana Gvozdić ◽  
On-Yu Dung ◽  
Dennis P. M. van Gils ◽  
Gert-Wim H. Bruggert ◽  
Elise Alméras ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Channel Flow ◽  
Water Tunnel ◽  
Mass And Heat Transfer ◽  
Temperature Controlled
Sign in / Sign up

Export Citation Format

Share Document