Study on heat transfer for falling liquid film flow with consideration of interfacial  evaporation

Abstract

Abstract: The interfacial evaporative heat transfer was included in the semi-empirical study of the
heat transfer for the falling liquid film flow. The investigations showed that, the
inclusion of the interfacial evaporative heat transfer in the turbulent model would lower
the predicted convective heat transfer coefficient. Predictions of the new model resulted
in a prominent deviation from that predictions of the normal model in the case of large
mass flow rate and low wall heat flux. This deviation will be decreased with increasing
wall heat flux, such that it will be asymptotic zero at very high wall heat flux.
Predictions of the new model agreed well with the current experimental measurements. This
study has verified that the Reynolds number is not the sole crucial parameter for heat
transfer of falling liquid film flow, and wall heat flux will be another important
independent parameter. This result is consistent with our previous studies.

Key words: falling liquid film, convective heat transfer, turbulent model

摘要： The interfacial evaporative heat transfer was included in the semi-empirical study of the
heat transfer for the falling liquid film flow. The investigations showed that, the
inclusion of the interfacial evaporative heat transfer in the turbulent model would lower
the predicted convective heat transfer coefficient. Predictions of the new model resulted
in a prominent deviation from that predictions of the normal model in the case of large
mass flow rate and low wall heat flux. This deviation will be decreased with increasing
wall heat flux, such that it will be asymptotic zero at very high wall heat flux.
Predictions of the new model agreed well with the current experimental measurements. This
study has verified that the Reynolds number is not the sole crucial parameter for heat
transfer of falling liquid film flow, and wall heat flux will be another important
independent parameter. This result is consistent with our previous studies.

关键词: falling liquid film;convective heat transfer;turbulent model

ZHANG Jintao, WANG Buxuan, PENG Xiaofeng, DU Jianhua. Study on heat transfer for falling liquid film flow with consideration of interfacial
evaporation [J]. .

张金涛, 王补宣, 彭晓峰, 杜建华. 考虑界面蒸发时的降液膜流动传热[J]. CIESC Journal.

References

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[14] Wang, B. X., Zhang, J. T., Peng, X. F., “The effect of in terfacial evaporation on
heat and mass transfer of falling liquid film”, Science in China, Series E, 29 (3),
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Study on heat transfer for falling liquid film flow with consideration of interfacial
evaporation

考虑界面蒸发时的降液膜流动传热

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