Computational analysis of an instantaneous chemical reaction in a T-microreactor

AIChE Journal ◽  
2009 ◽  
Vol 56 (6) ◽  
pp. 1406-1415 ◽  
Author(s):  
Dieter Bothe ◽  
Alexander Lojewski ◽  
Hans-Joachim Warnecke
Keyword(s):  
Chemical Reaction ◽  
Computational Analysis ◽  
Instantaneous Chemical Reaction ◽  
Instantaneous Chemical

Experimental study on miscible viscous fingering involving viscosity changes induced by variations in chemical species concentrations due to chemical reactions

2007 ◽  
Vol 571 ◽  
pp. 475-493 ◽  
Author(s):  
YUICHIRO NAGATSU ◽  
KENJI MATSUDA ◽  
YOSHIHITO KATO ◽  
YUTAKA TADA
Keyword(s):  
Viscous Liquid ◽  
Chemical Reaction ◽  
Chemical Species ◽  
Viscous Fingering ◽  
Shielding Effect ◽  
Species Concentration ◽  
Cell Changes ◽  
Hele Shaw Cell ◽  
Instantaneous Chemical Reaction ◽  
Instantaneous Chemical

When a reactive and miscible less-viscous liquid displaces a more-viscous liquid in a Hele-Shaw cell, reactive miscible viscous fingering takes place. We succeed in showing experimentally how a reactive miscible viscous fingering pattern in a radial Hele-Shaw cell changes when the viscosity of the more-viscous liquid is varied owing to variation in chemical species concentration induced by an instantaneous chemical reaction. This is done by making use of a polymer solution's dependence of viscosity on pH. When the viscosity is increased by the chemical reaction, the shielding effect is suppressed and the fingers are widened. As a result, the ratio of the area occupied by the fingering pattern in a circle whose radius is the length of the longest finger is larger in the reactive case than in the non-reactive case. When the viscosity is decreased by the chemical reaction, in contrast, the shielding effect is enhanced and the fingers are narrowed. These lead to the area ratio being smaller in the reactive case than in the non-reactive case. A physical model to explain this change in the fingering pattern caused by the chemical reaction is proposed.

Mass transfer with instantaneous chemical reaction in a rigid drop

AIChE Journal ◽  
1988 ◽  
Vol 34 (4) ◽  
pp. 694-697 ◽  
Author(s):  
B. K. Dutta ◽  
Usuf Middya ◽  
Parthasarathi Ray
Keyword(s):  
Mass Transfer ◽  
Chemical Reaction ◽  
Instantaneous Chemical Reaction ◽  
Instantaneous Chemical
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