Film Mass Transfer Coefficient Expressions for Electroosmotic Flows

2000 ◽  
Vol 229 (2) ◽  
pp. 540-543 ◽  
Author(s):  
Athanasios I. Liapis ◽  
Brian A. Grimes
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Film Mass Transfer ◽  
Electroosmotic Flows

Experimental determination of fluid-film mass transfer coefficient from adsorption uptake curve

2011 ◽  
Vol 173 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Junpei Fujiki ◽  
Tatsuru Shinomiya ◽  
Takashi Kawakita ◽  
Seiji Ishibashi ◽  
Eiji Furuya
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Experimental Determination ◽  
Fluid Film ◽  
Uptake Curve ◽  
Film Mass Transfer

Influence of the fetch parameter on results from empirical correlations for estimating odorous emissions at passive liquid surfaces

2016 ◽  
Vol 74 (10) ◽  
pp. 2384-2391 ◽  
Author(s):  
Ademir A. Prata ◽  
Milena J. Calvo ◽  
Gaetano Boncardo ◽  
Eric C. Sivret ◽  
Jane M. Santos ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Model Compound ◽  
Emission Rate ◽  
Wastewater Treatment Plants ◽  
Effective Diameter ◽  
Empirical Correlations ◽  
Film Mass Transfer ◽  
Liquid Surfaces

Passive liquid surfaces in wastewater treatment plants may be potential sources of odorous emissions. This study investigates the occurrence and significance of deviations that may originate from the use of the effective diameter as fetch parameter in the empirical correlations utilised by the WATER9 model to estimate odorous emissions at passive liquid surfaces. A sensitivity analysis was performed using benzene as a model compound and considering representative conditions of wind speed and wind alignment. The gas-film mass transfer coefficient (kG) was found relatively in sensitive to the choice of the fetch parameter, deviating less than 15% for aspect rations up to 15. The calculation of the liquid-film mass transfer coefficient (kL) was much more sensitive (positive extreme of 126.98% and negative extreme of −54.80%), partially because of the use of different equations for different fetch-to-depth ratios. For more volatile compounds, such as benzene, these discrepancies will be significantly manifested in the estimated emission rate. When appropriate, the use of the actual fetch instead of the effective diameter is recommended.

scholarly journals Simulation of Cooling Film Density Ratios in a Mass Transfer Technique

1989 ◽  
Author(s):  
H. D. Ammari ◽  
N. Hay ◽  
D. Lampard
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Schmidt Number ◽  
Gas Injection ◽  
Systematic Investigation ◽  
Transfer Coefficients ◽  
Film Mass Transfer ◽  
Transfer Method ◽  
Density Ratios

A systematic investigation of the influence of molecular Schmidt number on cooling film mass transfer coefficient has been conducted using a swollen polymer technique and laser holographic interferometry. A variation in Schmidt number by about 28% was accomplished by injection of a foreign gas and gas mixtures through a single normal hole at a blowing rate of one. The experiments were performed at a constant temperature in a subsonic, zero mainstream pressure gradient turbulent boundary layer on a flat plate. The experimental results indicate that Schmidt number has a negligible effect on cooling film mass transfer coefficient within the range examined. Consequently, measurement of cooling film mass transfer coefficients at non-unity density ratios using a mass transfer method with foreign gas injection is experimentally validated.

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