Flow and heat transfer characteristics of a staggered array of Kagome lattice structures in rectangular channels

Xu, Liang; Chen, Hanghang; Xi, Lei; Xiong, Yanhong; Gao, Jianmin; Li, Yunlong

doi:10.1007/s00231-021-03100-2

Cited by 12 publications

(1 citation statement)

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“…The same approach was used to calculate the average air-side heat transfer coefficient for a tube bundle heat exchanger with a novel fin design in the paper by Unger et al [42]. Xu et al [43] used a linear interpolation of the average temperature at the inlet and outlet of the channel when evaluating the mean Nusselt number of a staggered array of Kagome lattice structures. Wang et al [44] proved that an incorrect reference temperature of the fin side surface heat transfer coefficient leads to discrepancies between the experimental and numerical results.…”

Section: Introductionmentioning

confidence: 99%

Determination of the Reference Temperature for a Convective Heat Transfer Coefficient in a Heated Tube Bank

Kotšmíd

Brodnianská

2021

Applied Sciences

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The paper presents a theoretical analysis of heat transfer in a heated tube bank, based on the Nusselt number computation as one of the basic dimensionless criteria. To compute the Nusselt number based on the heat transfer coefficient, the reference temperature must be determined. Despite the value significance, the quantity has several different formulations, which leads to discrepancies in results. This paper investigates the heat transfer of the inline and staggered tube banks, made up of 20 rows, at a constant tube diameter and longitudinal and transverse pitch. Both laminar and turbulent flows up to Re = 10,000 are considered, and the effect of gravity is included as well. Several locations for the reference temperature are taken into consideration on the basis of the heretofore published research, and the results in terms of the overall Nusselt number are compared with those obtained by the experimental correlations. This paper provides the most suitable variant for a unique reference temperature, in terms of a constant value for all tube angles, and the Reynolds number ranges of 100–1000 and 1000–10,000 which are in good agreement with the most frequently used correlating equations.

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Section: Introductionmentioning

confidence: 99%