Flow distribution and pressure drop in plate heat exchangers—I U-type arrangement

Bassiouny, M. Khalil; Martin, Holger

doi:10.1016/0009-2509(84)80176-1

Cited by 204 publications

(110 citation statements)

References 2 publications

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“…Thereby it becomes an utmost necessity to properly understand the flow maldistribution behavior in such systems since grossly non-uniform cooling can lead to failure of certain regions of the source device. The extent of flow maldistribution in macro and minichannels are well understood from the several proposed models [6][7][8] however such models fail to predict maldistribution of flow in parallel microchannels [9] since such models either neglect frictional effects within channels or the inertial effects in the manifold while both effects are equally important in case of parallel microchannels [9]. There are several experimental and numerical reports that attempt to understand flow distribution of single phase flows in parallel microchannels [10][11][12][13], for both adiabatic and heat transfer cases.…”

Section: Introductionmentioning

confidence: 99%

Particle and thermohydraulic maldistribution of nanofluids in parallel microchannel systems

Maganti

Dhar

Sundararajan

et al. 2016

Microfluid Nanofluid

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Fluidic maldistribution in microscale multichannel devices requires deep understanding to achieve optimized flow and heat transfer characteristics. A thorough computational study has been performed to understand the concentration and thermo-hydraulic maldistribution of nanofluids in parallel microchannel systems using an Eulerian-Lagrangian twin phase model.The study reveals that nanofluids cannot be treated as homogeneous single phase fluids in such complex flow domains and effective property models fail drastically to predict the performance parameters. To comprehend the distribution of the particulate phase, a novel concentration maldistribution factor has been proposed. It has been observed that distribution of particles need not essentially follow the flow pattern, leading to higher thermal performance than expected from homogeneous models. Particle maldistribution has been conclusively shown to be due to various migration and diffusive phenomena like Stokesian drag, Brownian motion, thermophoretic drift, etc. The implications of particle distribution on the cooling performance have been illustrated and smart fluid effects (reduced magnitude of maximum temperature) have been observed and a mathematical model to predict the enhanced cooling performance in such flow geometries has been proposed. The article presents lucidly the effectiveness of discrete phase approach in modelling nanofluid thermo-hydraulics and sheds insight on behavior of nanofluids in complex flow domains.2

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Section: Introductionmentioning

confidence: 99%

Particle and thermohydraulic maldistribution of nanofluids in parallel microchannel systems

Maganti

Dhar

Sundararajan

et al. 2016

Microfluid Nanofluid

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“…There are several papers [26][27][28][29][30] that introduce analytical models which describe the flow distribution in manifolds. One that could be used to predict the velocity distribution, flow distribution, and pressure drop was shown in [26]:…”

Section: Introductionmentioning

confidence: 99%

“…One that could be used to predict the velocity distribution, flow distribution, and pressure drop was shown in [26]:…”

Section: Introductionmentioning

confidence: 99%

Selected studies of flow maldistribution in a minichannel plate heat exchanger

Dąbrowski¹,

Klugmann²,

Mikielewicz³

2017

Archives of Thermodynamics

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Analysis of the state of-the-art in research of minichannel heat exchangers, especially on the topic of flow maldistribution in multiple channels, has been accomplished. Studies on minichannel plate heat exchanger with 51 parallel minichannels with four hydraulic diameters, i.e., 461 µm, 574 µm, 667 µm, and 750 µm have been presented. Flow at the instance of filling the microchannel with water at low flow rates has been visualized. The pressure drop characteristics for single minichannel plate have been presented along with the channels blockage, which occurred in several cases. The impact of the mass flow rate and channels' cross-section dimensions on the flow maldistribution were illustrated.

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“…A great number of experimental, analytical, and numerical studies deal with flow in manifold. The flow in distribution manifold has been studied by several investigators [1][2][3][4][5][6][7][8][9]. In general, all previous studies for manifolds with different applications had shown that typical manifold design does not give a uniform flow distribution at outlets.…”

Section: Introductionmentioning

confidence: 99%

Performance Improvement of a Typical Manifold using Computational Fluid Dynamics

Subaschandar

Sakthivel²

2016

MATEC Web of Conferences

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Abstract. This paper presents an analysis of fluid flow in a typical manifold. A commercially available Computational Fluid Dynamics (CFD) package has been used to analyze the flow pattern inside the manifold. Pressure drop in whole fluid domain and mass flow rate in all the outlets in the manifold have been computed. Based on the preliminary results, a modification to inside of the main pipe of the manifold has been incorporated. The performance of the modified design has been compared with the original design from the point of view of average temperature and mass flow rate at the outlets. A simple modification has been shown to improve the uniformity of temperature and mass flow at the outlets.

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Flow distribution and pressure drop in plate heat exchangers—I U-type arrangement

Cited by 204 publications

References 2 publications

Particle and thermohydraulic maldistribution of nanofluids in parallel microchannel systems

Particle and thermohydraulic maldistribution of nanofluids in parallel microchannel systems

Selected studies of flow maldistribution in a minichannel plate heat exchanger

Performance Improvement of a Typical Manifold using Computational Fluid Dynamics

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