Flow behavior in parallel heated pipes: The role of pipe inclination

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2025-03-11 DOI:10.1016/j.icheatmasstransfer.2025.108841

Ron Rene Hayat , Dvora Barnea , Yehuda Taitel

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引用次数: 0

Abstract

This study theoretically investigates the impact of pipe inclination, ranging from vertical upward to vertical downward, on evaporating flow in parallel pipes with shared inlet and outlet headers.

The first step in analyzing the flow behavior of multiple parallel pipes is to obtain the characteristic curve of pressure difference versus flow rate for a single heated pipe. Momentum and energy balances are iteratively solved, incorporating the local instantaneous flow pattern.

By utilizing the inclination dependent characteristic curves of individual pipes within an array of parallel inclined pipes all possible steady-state solutions for pressure difference and flow rate distribution can be determined as functions of the inlet flow rate for various inclination angles. Furthermore, time-dependent equations have been introduced for a system of parallel inclined pipes, and transient simulations have been conducted.

The study reveals that, depending on the inclination angle, pipe's diameter and heating power, three types of characteristic curves can be obtained for a single pipe. In the case of two parallel pipes, the effect of the inclination angle on the flow rate distributions and the system pressure drop has been shown. Three flow distribution patterns are identified: equal flow rate distribution, maldistribution, and maldistribution with oscillations.

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来源期刊

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

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.