Measurement of NAPL–water interfacial areas and mass transfer rates in two-dimensional flow cell

2016 ◽  
Vol 74 (9) ◽  
pp. 2145-2151 ◽  
Author(s):  
Muzi Li ◽  
Yuanzheng Zhai ◽  
Li Wan
Keyword(s):  
Mass Transfer ◽  
Interfacial Area ◽  
Chemical Oxidation ◽  
Flow Cell ◽  
Two Dimensional ◽  
Transfer Rates ◽  
Dimensional Flow ◽  
Interfacial Areas ◽  
Two Dimensional Flow

The nonaqueous-phase liquid (NAPL)–water interfacial area and the mass transfer rate across the NAPL and water interface are often key factors in in situ groundwater pollution treatment. In this study, the NAPL–water interfacial area and residual NAPL saturation were measured using interfacial and partitioning tracer tests in a two-dimensional flow cell. The results were compared with previous column and field experiment results. In addition, the mass transfer rates at various NAPL–water interfacial areas were investigated. Fe2+-activated persulfate was used for in situ chemical oxidation remediation to remove NAPL gradually. The results showed that the reduction of NAPL–water interfacial areas as well as NAPL saturation by chemical oxidation caused a linear decrease in the interphase mass transfer rates (R2 = 0.97), revealing the relationship between mass transfer rates and interfacial areas in a two-dimensional system. The NAPL oxidation rates decreased with the reduction of interfacial areas, owing to the control of NAPL mass transfer into the aqueous phase.

Treating Methyl Orange in a Two-Dimensional Flow Tank by In Situ Chemical Oxidation Using Slow-Release Persulfate Activated with Zero-Valent Iron

2015 ◽  
Vol 32 (12) ◽  
pp. 1007-1015 ◽  
Author(s):  
Chanat Chokejaroenrat ◽  
Chainarong Sakulthaew ◽  
Tunlawit Satapanajaru ◽  
Thanakorn Tikhamram ◽  
Alongkon Pho-Ong ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Slow Release ◽  
Chemical Oxidation ◽  
Zero Valent Iron ◽  
Two Dimensional ◽  
In Situ Chemical Oxidation ◽  
Dimensional Flow ◽  
Two Dimensional Flow

Convective Transport Phenomena on the Suction Surface of a Turbine Blade Including the Influence of Secondary Flows Near the Endwall

1992 ◽  
Vol 114 (4) ◽  
pp. 776-787 ◽  
Author(s):  
P. H. Chen ◽  
R. J. Goldstein
Keyword(s):  
Mass Transfer ◽  
Turbine Blade ◽  
Transfer Rate ◽  
Mass Transfer Rate ◽  
Convective Transport ◽  
Secondary Flows ◽  
Two Dimensional ◽  
Suction Surface ◽  
Dimensional Flow ◽  
Two Dimensional Flow

A naphthalene sublimation technique is employed to study the mass transfer distribution on the suction (convex) surface of a simulated turbine blade. Comparison with a heat transfer study shows good agreement in the general trends in the region of two-dimensional flow on the blade. Near the endwall, local connective coefficients on the suction surface are obtained at 4608 locations from two separate runs. The secondary flows in the passage significantly affect the mass transfer rate on the suction surface and their influence extends to a height of 75 percent of the chord length, from the endwall, in the trailing edge region. The mass transfer rate in the region near the endwall is extremely high due to small but intense vortices. Thus, a large variation in the mass transfer distribution occurs on the suction surface, from a mass transfer Stanton number of 0.0005 to a maximum of 0.01. In the two-dimensional flow region, the mass transfer distributions at two different Reynolds numbers are presented.

scholarly journals Convective Transport Phenomena on the Suction Surface of a Turbine Blade Including the Influence of Secondary Flows Near the Endwall

1991 ◽  
Author(s):  
P. H. Chen ◽  
R. J. Goldstein
Keyword(s):  
Mass Transfer ◽  
Turbine Blade ◽  
Transfer Rate ◽  
Mass Transfer Rate ◽  
Convective Transport ◽  
Secondary Flows ◽  
Two Dimensional ◽  
Suction Surface ◽  
Dimensional Flow ◽  
Two Dimensional Flow

A naphthalene sublimation technique is employed to study the mass transfer distribution on the suction (convex) surface of a simulated turbine blade. Comparison with a heat transfer study shows good agreement in the general trends in the region of two-dimensional flow on the blade. Near the endwall, local convective coefficients on the suction surface are obtained at 4608 locations from two separate runs. The secondary flows in the passage significantly affect the mass transfer rate on the suction surface and their influence extends to a height of 75% of the chord length, from the endwall, in the trailing edge region. The mass transfer rate in the region near the endwall is extremely high due to small but intense vortices. Thus, a large variation in the mass transfer distribution occurs on the suction surface, from a mass transfer Stanton number of 0.0005 to a maximum of 0.01. In the two-dimensional flow region, the mass transfer distributions at two different Reynolds number are presented.

Two-Dimensional Flow of Polymer Solutions Through Porous Media

1999 ◽  
Vol 2 (3) ◽  
pp. 251-262
Author(s):  
P. Gestoso ◽  
A. J. Muller ◽  
A. E. Saez
Keyword(s):  
Porous Media ◽  
Polymer Solutions ◽  
Two Dimensional ◽  
Dimensional Flow ◽  
Two Dimensional Flow
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