Development and validation of an analytical formulation of the Nusselt and Sherwood numbers on a partially wetted absorber tube

Niccolo Giannetti; Ryosuke Moriwaki; Seiichi Yamaguchi; Kiyoshi Saito

doi:10.1080/23744731.2018.1447601

Development and validation of an analytical formulation of the Nusselt and Sherwood numbers on a partially wetted absorber tube

Niccolo Giannetti^*, Ryosuke Moriwaki, Seiichi Yamaguchi, Kiyoshi Saito

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

With reference to a simplified analytical solution of the governing differential equation for falling film absorption, the corresponding formulation of the average Nusselt and Sherwood numbers obtained around a smooth horizontal tube is validated through a dedicated experimental investigation and data from previous literature. The assumption of a linear temperature profile together with the average interfacial mass fraction gradient and the hypotheses of small penetration for physical absorption are applied at the film interface to reach closed analytical expressions of average Nusselt and Sherwood numbers within falling film absorbers and generators. The inclusion of partial-wetting effects brings the results closer to the measurements and widens the applicability of these expressions.

Original language	English
Pages (from-to)	1-11
Number of pages	11
Journal	Science and Technology for the Built Environment
DOIs	https://doi.org/10.1080/23744731.2018.1447601
Publication status	Accepted/In press - 2018 Mar 5

ASJC Scopus subject areas

Environmental Engineering
Building and Construction
Fluid Flow and Transfer Processes

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abstract = "With reference to a simplified analytical solution of the governing differential equation for falling film absorption, the corresponding formulation of the average Nusselt and Sherwood numbers obtained around a smooth horizontal tube is validated through a dedicated experimental investigation and data from previous literature. The assumption of a linear temperature profile together with the average interfacial mass fraction gradient and the hypotheses of small penetration for physical absorption are applied at the film interface to reach closed analytical expressions of average Nusselt and Sherwood numbers within falling film absorbers and generators. The inclusion of partial-wetting effects brings the results closer to the measurements and widens the applicability of these expressions.",

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AU - Giannetti, Niccolo

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AU - Yamaguchi, Seiichi

AU - Saito, Kiyoshi

PY - 2018/3/5

Y1 - 2018/3/5

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Development and validation of an analytical formulation of the Nusselt and Sherwood numbers on a partially wetted absorber tube

Abstract

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