探测波纹通道的水热性能:数值研究

Anindya Nath, Hrishav Dey, Sukumar Pati
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引用次数: 0

摘要

这项研究深入探讨了梯形、正弦形和三角形几何形状的波纹通道在非牛顿粘性流体流动时的水热性能。研究系统地考察了宾汉数(Bn)、幂律指数(n)和雷诺数(Re)对水热性能的影响,这些影响可以用平均努塞尔特数(Nu¯)、增强比(ER)和性能系数(PF)来量化。再循环区的大小随着 Bn 的增大而减小,在 Bn 值较高时不再存在。Nu¯ 值随着 n 的增大而减小,在 Re = 500 时,n 从 0.5 增大到 1 时,梯形几何体的 Nu¯ 值最大减小了 14%。在整个 Bn 范围内,梯形几何图形的 Nu¯ 性能最好,在 n = 0.8 和 Re = 500 时,比三角形几何图形的 Nu¯ 增加了 20%。ER主要在Bn的较低范围内表现明显,达到临界阈值(Bncr),使用梯形几何图形时,ER比三角形几何图形增加了近3.6倍,这表明在Bn的较大带宽内,梯形几何图形的性能优于普通信道。PF 的变化与几何参数和流变参数的综合影响密切相关,梯形通道表现出更优越的性能。
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Probing the hydrothermal performance of corrugated channels: A numerical scrutiny
This work delves into probing the hydrothermal performance of corrugated channels of trapezoidal, sinusoidal and triangular geometries for the flow of a non-Newtonian viscoplastic fluid. The study systematically examines the effects of Bingham number (Bn), power-law index (n) and Reynolds number (Re) on the hydrothermal performance quantified by average Nusselt number (Nu¯), enhancement ratio (ER) and performance factor (PF). The recirculation zone size diminishes with increasing Bn and ceases to exist at higher Bn values. The value of Nu¯ decreases with an increase in n with the highest decrement of 14 % for the trapezoidal geometry as n increases from 0.5 to 1 at Re = 500. Over the entire range of Bn, trapezoidal geometry shows the best performance in terms of Nu¯ with 20 % increase over triangular geometry at n = 0.8 and Re = 500. The ER is evident predominantly within the lower range of Bn reaching a critical threshold (Bncr), which increases by almost 3.6 times with respect to the triangular geometry when trapezoidal geometry is used indicating better performance of trapezoidal geometry over that of a plain channel over a larger bandwidth of Bn. The variation in PF is intricately tied to the combined influence of geometrical and rheological parameters and the trapezoidal channel demonstrated superior performance.
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来源期刊
CiteScore
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10.00%
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审稿时长
32 days
期刊介绍: International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.
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