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The developing Nusselt numbers for slug flow in rectangular ducts

✍ Scribed by M. Spiga; G.L. Morini

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
674 KB
Volume
41
Category
Article
ISSN
0017-9310

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✦ Synopsis

A rigorous solution is obtained for the 3-D temperature field in the thermal entrance region of rectangular ducts, for Newtonian fluids in slug flow, with constant wall heat flux and fluid longitudinal heat flux (H2 boundary conditions). The solution is presented as a series of the transverse Cartesian co-ordinates, where the coefficients depend on both the longitudinal co-ordinate and the different combinations of heated and adiabatic walls. The thermal entrance lengths and the Nusselt numbers are calculated as functions of both the Graetz number and the aspect ratio. The temperature profiles, the thermal entrance lengths. and the Nusselt numbers are presented and discussed in tables and graphs. 'I?

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