Turbulent flow Chilton-Colbum analogy

G. Laminar and turbulent, flat plate, forced flow >=7h = = 0.037 Chilton-Colbum analogies, Nsc = 1-0, (gases), /= drag coefficient. Corresponds to item 5-21-F and refers to same conditions. 8000 < < 300,000. Can apply analogy,=/ 2, to entire plate (including laminar portion) if average values are used. [100] p. 193 [109] p. 112 [146] p. 201 [151] p.271... 

Based on the experimental study it is concluded that for any Reynolds number in the turbulent-flow regime, the experimental Sherwood number falls between the two values predicted with the Chilton-Colbum analogy, from (a) the experimentally determined friction factor for the tested reactor and (b) the theoretical friction factor for a smooth rod bundle with the same relative pitch. Using these two predictions as the limiting values, the experimental Sherwood numbers can be predicted with an accuracy of ca. 30%, which is acceptable in most cases. 

Transfer from the wall of a tube to a fluid in turbulent flow is the situation most commonly consideted for the development of the analogies. Sherwood, el al. critically compared varkros analogies with both heat transfer d and mass transfer data at high Schmidt numbers (liquids) and low Schmidt mimbers (gases) and concluded that the sim rie Chilton-Colbum analogy does abwt as well as any of the corieltUions in representii the results. 

---