ISSN:
0001-1541
Schlagwort(e):
Chemistry
;
Chemical Engineering
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
Notizen:
A rapid, irreversible, second-order chemical reaction in the turbulent wake of a cylinder was studied. A hypothesis relating the correlation of the fluctuating concentrations directly to the mean concentrations of the reacting species was found applicable, at least, when tested for a pseudo first-order reaction system.Experimentally, the mean concentration profiles of a colored reactant were obtained with and without reaction by time-exposure photographs. Since the reactant changed from colored to colorless during reaction, the rate of reaction could be determined directly from the rate of color disappearance.Both the reaction rate and the turbulent intensity divided by the half-width of the wake were found to be inversely proportional to the distance from the source for x/d values from 35 to 180. This indicates a direct relationship between them. Consequently, the concentration correlation function also may be related directly to the turbulent intensity divided by the wake half-width.In addition, it is shown that the rate of reaction is faster in the center of the wake than it is toward the edges.
Zusätzliches Material:
8 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/aic.690110619
