An overview of heat transfer in non-boiling two phase (Taylor) flow in straight tubes is given. New models, which were developed for gas-liquid and liquid-liquid segmented flows in ducts and channels, will be presented. These models are an improvement of earlier analyses presented and published by the author. In the present work, it is shown that for constant wall temperature, the dimensionless mean wall flux has two characteristic behaviours:  thermal boundary layer flow and fully developed flow. These can also be viewed as short and long residence times as the plug train moves through the tube or channel. The boundary layer limit is dominant for short residence times while fully developed flow occurs for longer residence times. An additional parameter, the plug length to duct length ratio, L_s/L, is shown to have significant impact on the rate of heat transfer. This parameter must be controlled in experiments in order for performance to be predictable. It is also shown that the proper scaling of the non-dimensional data is with respect to dimensionless plug length Ls\* and not the traditional dimensionless Graetz length. The new models are compared with experimental data from several published studies in which the variables were well controlled.  


Heat Transfer in Taylor Flow

Division / Sponsors: 
Heat Transfer Division (HTD), Fluids Engineering Division (FED)

Heat Transfer Summer Conference
Paper Proceedings: https://asmedigitalcollection.asme.org/HT/HT2020/volume/83709

18th International Conference on Nanochannels, Microchannels, and Minichannels
Paper Proceedings: https://asmedigitalcollection.asme.org/ICNMM/ICNMM2020/volume/83693

Fluids Engineering Division Summer Meeting
Paper Proceedings: https://asmedigitalcollection.asme.org/FEDSM/FEDSM2020/volume/83716

HT-ICNMM2020 - Virtual Conference, SHTC - Virtual Conference, FEDSM2020 - Virtual Conference

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