Open Access
ARTICLE
Numerical Investigations of Laminar Air Flow and Heat Transfer Characteristics in a Square Channel Inserted with Discrete X-V Baffles (XVB)
Amnart Boonloi1, Withada Jedsadaratanachai2,*
1
Department of Mechanical Engineering Technology, College of Industrial Technology, King Mongkut’s University of Technology
North Bangkok, Bangkok, 10800, Thailand
2
Department of Mechanical Engineering, School of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok,
10520, Thailand
* Corresponding Author: Withada Jedsadaratanachai. Email:
Frontiers in Heat and Mass Transfer 2023, 21, 317-336. https://doi.org/10.32604/fhmt.2023.044929
Received 11 May 2023; Accepted 26 June 2023; Issue published 30 November 2023
Abstract
Thermal performance enhancement in a square channel heat exchanger (HX) using a passive technique is
presented. Vortex turbulator insertion in a square channel HX as a passive technique is selected for thermal
improvement. The vortex turbulator of interest is discrete X-V baffles (XVB). The discrete XVBs are inserted in the
square channel with the main aim of generating vortex flow. The vortex flow generated can support the enhanced
convective heat transfer coefficient and also enhance HX performance. Effects of baffle configuration (type A and
B), baffle size (w/H = 0.05, 0.10, 0.15 and 0.20), baffle distance (e/H = 1, 1.5 and 2) and flow direction (±x air flow
paths) on fluid flow and thermal topologies are numerically investigated by using a commercial code. As shown by
the numerical results, the predicted flow configuration with the discrete XVB insertions, which include impinging
and vortex streams, is found through the HX channel. The perturbing thermal boundary layer and greater air
blending are also found through the HX channel inserted with the discrete XVB. These mechanisms promote and
augment the convection heat transfer coefficient, heat transfer rate and rise thermal potentiality. The maximum
Nusselt number of the channel with the baffles inserted is 11.01 times upper than that of the smooth channel, while
the greatest thermal performance factor (TPF) is observed to be around 3.45.
Graphical Abstract
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Cite This Article
APA Style
Boonloi, A., Jedsadaratanachai, W. (2023). Numerical investigations of laminar air flow and heat transfer characteristics in a square channel inserted with discrete X-V baffles (XVB). Frontiers in Heat and Mass Transfer, 21(1), 317-336. https://doi.org/10.32604/fhmt.2023.044929
Vancouver Style
Boonloi A, Jedsadaratanachai W. Numerical investigations of laminar air flow and heat transfer characteristics in a square channel inserted with discrete X-V baffles (XVB). Front Heat Mass Transf. 2023;21(1):317-336 https://doi.org/10.32604/fhmt.2023.044929
IEEE Style
A. Boonloi and W. Jedsadaratanachai, "Numerical Investigations of Laminar Air Flow and Heat Transfer Characteristics in a Square Channel Inserted with Discrete X-V Baffles (XVB)," Front. Heat Mass Transf., vol. 21, no. 1, pp. 317-336. 2023. https://doi.org/10.32604/fhmt.2023.044929