Effect of Secondary Vortex Flow Near Contact Point on Thermal Performance in the Plate Heat Exchanger with Different Corrugation Profiles
The present study numerically investigates thermal performance and turbulent flow characteristics of chevron-type plate heat exchangers with sinusoidal, trapezoidal, triangular, and elliptical corrugation profiles. The commercial code of ANSYS Fluent (v. 17.0) is used for computational fluid dynamic...
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MDPI AG
2020-03-01
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Series: | Energies |
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Online Access: | https://www.mdpi.com/1996-1073/13/6/1328 |
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author | Hyung Ju Lee Seong Hyuk Lee |
author_facet | Hyung Ju Lee Seong Hyuk Lee |
author_sort | Hyung Ju Lee |
collection | DOAJ |
description | The present study numerically investigates thermal performance and turbulent flow characteristics of chevron-type plate heat exchangers with sinusoidal, trapezoidal, triangular, and elliptical corrugation profiles. The commercial code of ANSYS Fluent (v. 17.0) is used for computational fluid dynamics (CFD) simulation with the realizable <i>k</i>-<i>ε</i> model. In particular, we focus on the influence of configuration shape on a substantial change in flow direction near the contact point, yielding local vorticity. As a result, secondary vortical motions are observed in the flow passage with vorticity that is distributed locally and which changes near the contact point. Higher flow mixing generated and distributed by the secondary vortical motions contributes to the increase of the Colburn <i>j</i>-factor as well as the friction factor. The highest Colburn <i>j</i>-factor and friction factor are obtained for an elliptical profile, compared to other shapes, because of the increase in the vortex strength near the contact point. |
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id | doaj.art-930baea114274327a38fd8ca81b71c83 |
institution | Directory Open Access Journal |
issn | 1996-1073 |
language | English |
last_indexed | 2024-04-14T01:19:45Z |
publishDate | 2020-03-01 |
publisher | MDPI AG |
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series | Energies |
spelling | doaj.art-930baea114274327a38fd8ca81b71c832022-12-22T02:20:42ZengMDPI AGEnergies1996-10732020-03-01136132810.3390/en13061328en13061328Effect of Secondary Vortex Flow Near Contact Point on Thermal Performance in the Plate Heat Exchanger with Different Corrugation ProfilesHyung Ju Lee0Seong Hyuk Lee1School of Mechanical Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, KoreaSchool of Mechanical Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, KoreaThe present study numerically investigates thermal performance and turbulent flow characteristics of chevron-type plate heat exchangers with sinusoidal, trapezoidal, triangular, and elliptical corrugation profiles. The commercial code of ANSYS Fluent (v. 17.0) is used for computational fluid dynamics (CFD) simulation with the realizable <i>k</i>-<i>ε</i> model. In particular, we focus on the influence of configuration shape on a substantial change in flow direction near the contact point, yielding local vorticity. As a result, secondary vortical motions are observed in the flow passage with vorticity that is distributed locally and which changes near the contact point. Higher flow mixing generated and distributed by the secondary vortical motions contributes to the increase of the Colburn <i>j</i>-factor as well as the friction factor. The highest Colburn <i>j</i>-factor and friction factor are obtained for an elliptical profile, compared to other shapes, because of the increase in the vortex strength near the contact point.https://www.mdpi.com/1996-1073/13/6/1328plate heat exchangercomputational fluid dynamics (cfd)corrugation profilecolburn <i>j</i>-factorfriction factor |
spellingShingle | Hyung Ju Lee Seong Hyuk Lee Effect of Secondary Vortex Flow Near Contact Point on Thermal Performance in the Plate Heat Exchanger with Different Corrugation Profiles Energies plate heat exchanger computational fluid dynamics (cfd) corrugation profile colburn <i>j</i>-factor friction factor |
title | Effect of Secondary Vortex Flow Near Contact Point on Thermal Performance in the Plate Heat Exchanger with Different Corrugation Profiles |
title_full | Effect of Secondary Vortex Flow Near Contact Point on Thermal Performance in the Plate Heat Exchanger with Different Corrugation Profiles |
title_fullStr | Effect of Secondary Vortex Flow Near Contact Point on Thermal Performance in the Plate Heat Exchanger with Different Corrugation Profiles |
title_full_unstemmed | Effect of Secondary Vortex Flow Near Contact Point on Thermal Performance in the Plate Heat Exchanger with Different Corrugation Profiles |
title_short | Effect of Secondary Vortex Flow Near Contact Point on Thermal Performance in the Plate Heat Exchanger with Different Corrugation Profiles |
title_sort | effect of secondary vortex flow near contact point on thermal performance in the plate heat exchanger with different corrugation profiles |
topic | plate heat exchanger computational fluid dynamics (cfd) corrugation profile colburn <i>j</i>-factor friction factor |
url | https://www.mdpi.com/1996-1073/13/6/1328 |
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