Significance of Rarefaction, Streamwise Conduction, and Viscous Dissipation on the Extended Graetz–Nusselt Problem: The Case of Finite-Length Microchannels with Prescribed Wall Heat Flux

Figure 8

Comparison between numerical (red dotted lines) and analytical results (blue continuous lines) for the average Nusselt as a function of (a) and (b) for . Two different values of are considered, and . Figures 8(a)-8(b) refer to and , . Reference values (vertical lines) are and . The arrows indicate increasing values of .

(a)

(b)