Flow boiling of a highly viscous pseudoplastic fluid in vertical tubes

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An experimental study of flow boiling heat transfer to a highly viscous fluid in vertical downward flow is presented for a consistency index η0 = 0.71–26.66 Pa sn, tube diameters D = 5.34, 7.71 and 10.27 mm, mass velocity G = 4.36–53.4 kg m−2s−1, a quality X = 0.0–0.54 and a heat flux q = 1.43–14.35 kW m−2. A correction based on the present experimental data has been developed which takes account of the effect of liquid viscosity on flow boiling heat transfer.