Resolving Local Reaction Environment toward an Optimized CO2-to-CO Conversion Performance

2022 ◽  
Author(s):  
Ke Ye ◽  
Guiru Zhang ◽  
Xian-Yin Ma ◽  
Chengwei Deng ◽  
Xin Huang ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Local Reaction ◽  
Vital Role ◽  
Electrolyte Interface ◽  
Co Conversion ◽  
Hydrodynamic Boundary Layer ◽  
Conversion Performance

The local reaction environment, especially the electrode-electrolyte interface and the relevant hydrodynamic boundary layer in the vicinity of cathode, plays a vital role in defining the activity and selectivity of...

scholarly journals Some hydrodynamic boundary layer influences on mass transfer coefficients

1984 ◽  
Vol 19 (3) ◽  
pp. 289-308 ◽  
Author(s):  
G.L. Flynn ◽  
A.B. French ◽  
N.F.H. Ho ◽  
W.I. Higuchi ◽  
E.A. Ostafin ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Mass Transfer ◽  
Transfer Coefficients ◽  
Mass Transfer Coefficients ◽  
Hydrodynamic Boundary Layer

scholarly journals Numerical Analysis of Heat Transfer of Eyring Powell Fluid Using Double Stratification of Magneto-Hydrodynamic Boundary Layer Flow

2020 ◽  
pp. 91-108
Author(s):  
Wekesa Waswa Simon ◽  
Winifred Nduku Mutuku
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Boundary Layer ◽  
Nusselt Number ◽  
Thermal Stratification ◽  
Fluid Velocity ◽  
Double Stratification ◽  
Hydrodynamic Boundary Layer ◽  
Layer Flow ◽  
The Magnetic Field

Heat transfer fluids play a vital role in many engineering and industrial sectors such as power generation, chemical production, air-conditioning, transportation and microelectronics. Aim: To numerically investigate the effect of double stratification on magneto-hydrodynamic boundary layer flow and heat transfer of an Eyring-Powell fluid. Study Design: Eyring-Powell fluid is one of the non-Newtonian fluid that possess different characteristics thus different mathematical models have been formulated to describe such fluids by appropriate substitution into Navier-Stoke’s equations. The challenging complexity and the nature of the resultant equations are of great interest hence attract many investigations. Place and Duration of Study: Department of Mathematics and Actuarial Science, Kenyatta University, Nairobi, Kenya between December 2019 and October 2020. Methodology: The resultant nonlinear equations are transformed to linear differential equations by introducing appropriate similarity transformations. The resulting equations are solved numerically by simulating the predictor-corrector (P-C) method in matlab ode113. The results are graphically depicted and analysed to illustrate the effects of magnetic field, thermophoresis, thermal stratification, solutal stratification, material fluid parameters and Grashoff number on the fluid velocity, temperature, concentration, local Sherwood number and local Nusselt number. Results: The results show that increasing the magnetic field strength, thermophoresis, thermal stratification and solutal stratification lead to a decrease in the fluid velocity, temperature, Sherwood number, Nusselt number and skin friction while an increase in the magnetic field strength, thermal stratification, solutal stratification, and thermophoresis increases the fluid concentration. Conclusion: The parameters in this study can be varied to enhance heat ejection of Eyring-Powell fluid and applied in industries as a coolant or heat transfer fluid.

MASS TRANSPIRATION IN MAGNETO-HYDRODYNAMIC BOUNDARY LAYER FLOW OVER A SUPERLINEAR STRETCHING SHEET EMBEDDED IN POROUS MEDIUM WITH SLIP

2019 ◽  
Vol 22 (8) ◽  
pp. 1015-1025
Author(s):  
P. N. Vinay Kumar ◽  
U. S. Mahabaleshwar ◽  
K. R. Nagaraju ◽  
Mohaddeseh Mousavi Nezhad ◽  
A. Daneshkhah
Keyword(s):  
Boundary Layer ◽  
Porous Medium ◽  
Boundary Layer Flow ◽  
Stretching Sheet ◽  
Hydrodynamic Boundary Layer ◽  
Layer Flow

The hydrodynamic boundary layer in wet spinning

1971 ◽  
Vol 3 (6) ◽  
pp. 649-652
Author(s):  
G. A. Danilin ◽  
A. V. Ryabushkin ◽  
A. T. Serkov
Keyword(s):  
Boundary Layer ◽  
Wet Spinning ◽  
Hydrodynamic Boundary Layer

scholarly journals Observations of iodine monoxide over three summers at the Indian Antarctic bases of Bharati and Maitri

2021 ◽  
Vol 21 (15) ◽  
pp. 11829-11842
Author(s):  
Anoop S. Mahajan ◽  
Mriganka S. Biswas ◽  
Steffen Beirle ◽  
Thomas Wagner ◽  
Anja Schönhardt ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Source Region ◽  
Measurement Techniques ◽  
Lower Boundary ◽  
Vital Role ◽  
Retrieval Algorithm ◽  
Back Trajectory ◽  
West Antarctica ◽  
Vertical Column ◽  
Iodine Chemistry

Abstract. Iodine plays a vital role in oxidation chemistry over Antarctica, with past observations showing highly elevated levels of iodine oxide (IO) leading to severe depletion of boundary layer ozone in West Antarctica. Here, we present MAX-DOAS-based (multi-axis differential absorption spectroscopy) observations of IO over three summers (2015–2017) at the Indian Antarctic bases of Bharati and Maitri. IO was observed during all the campaigns with mixing ratios below 2 pptv (parts per trillion by volume) for the three summers, which are lower than the peak levels observed in West Antarctica. This suggests that sources in West Antarctica are different or stronger than sources of iodine compounds in East Antarctica, the nature of which is still uncertain. Vertical profiles estimated using a profile retrieval algorithm showed decreasing gradients with a peak in the lower boundary layer. The ground-based instrument retrieved vertical column densities (VCDs) were approximately a factor of 3 to 5 higher than the VCDs reported using satellite-based instruments, which is most likely related to the sensitivities of the measurement techniques. Air mass back-trajectory analysis failed to highlight a source region, with most of the air masses coming from coastal or continental regions. This study highlights the variation in iodine chemistry in different regions in Antarctica and the importance of a long-term dataset to validate models estimating the impacts of iodine chemistry.

Sign in / Sign up

Export Citation Format

Share Document