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Figure 2.13. Nusselt number ratios Nu /Nuo, for fully-developed conditions measured at the downstream end of the test section and averaged in the l / Dh direction, as dependent upon the W /Dh coordinate for different Reynolds numbers and Toi /Tw =0.93-0.95.

Figure 2.14. Nusselt number ratios Nu /Nuo, for thermally developing flow measured at the upstream end of the test section and averaged in the W /Dh direction, as dependent upon the L/Dh coordinate for ReH=60,800 and Toi /Tw = 0.93-0.95. Symbols are defined in Fig. 2.15.

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