…
comment: The repository administrator has not yet configured an RDF license.
primary topic: EXPERIMENTAL AND NUMERICAL INVESTIGATION OF FLOW MALDISTRIBUTION IN A CIRCULAR MICROCHANNEL HEAT EXCHANGER AT VARIOUS FLOWRATES

EXPERIMENTAL AND NUMERICAL INVESTIGATION OF FLOW MALDISTRIBUTION IN A CIRCULAR MICROCHANNEL HEAT EXCHANGER AT VARIOUS FLOWRATES
type: AcademicArticle
type: Article
abstract: Configuration of the microchannels connection to the manifold in microchannel heat exchangers significantly influences flow uniformity in the microchannels and significantly affects the even thermal dissipation to the surroundings. This paper presents the uniformity anxieties of the flow through a non-protruded microchannel heat exchanger that has been explored experimentally and numerically. The prototype consisted of 5-mm-diameter inlet and outlet headers with 20 microchannels of 0.96-mm-diameter and 50-mm-long with no protrusion depth. The velocities were measured by particle image velocimetry at 308 and 617 ml/min flow rates, corresponding to Reynolds numbers of 1500 and 3000 based on the header diameter. Using ANSYS FLUENT, a CFD simulated the flow in the microchannels heat exchanger at Reynolds numbers of 1500, 3000, 4500, 6000, and 7500, allowing a detailed flow field visualization. The numerical procedure was validated by comparing the simulation velocity results with the experimental results, showing a mean relative error of all the 20 microchannels of 3.8 and 8.2 for flow rates of 308 and 923 ml/min, respectively. Both experimental and numerical results show that the microchannels' velocity distribution is not uniform at the last few microchannels. The present work results support the concept of a protruded microchannel that produces better uniform flow. Hence, extended investigations are recommended to explore the effect of the channel's protrusion on flow uniformity and address the high inconsistency in the pressure drop prediction. Also, the simulation could be beneficial if extended to compare the maldistribution with various manifold diameters. © 2023 Taylor's University. All rights reserved.
date: 2023
volume: 18
is part of: Journal of Engineering Science and Technology
status: peerReviewed
status: published
author list: authors
type: EPrint
type: ArticleEPrint
is part of: repository

Taylor's University
type: Organization

Journal of Engineering Science and Technology
type: Collection
issn: 18234690

H.A. Abdulwahhab
type: Person
given name: H.A.
family name: Abdulwahhab

I.M. Mohamed
type: Person
given name: I.M.
family name: Mohamed

H.H. Al-Kayiem
type: Person
given name: H.H.
family name: Al-Kayiem

A.D.J. Al-Bayati
type: Person
given name: A.D.J.
family name: Al-Bayati

HTML Summary of #17958 EXPERIMENTAL AND NUMERICAL INVESTIGATION OF FLOW MALDISTRIBUTION IN A CIRCULAR MICROCHANNEL HEAT EXCHANGER AT VARIOUS FLOWRATES
format: text/html
primary topic: EXPERIMENTAL AND NUMERICAL INVESTIGATION OF FLOW MALDISTRIBUTION IN A CIRCULAR MICROCHANNEL HEAT EXCHANGER AT VARIOUS FLOWRATES