International Scientific Journal


This paper presents a comprehensive analysis of the dynamic and thermal behavior of air-flow within a heat exchanger equipped with two distinctive baffles: a perforated baffle and a partially inclined baffle. The influence of hole positioning in the perforated baffle on the overall performance of the heat exchanger is thoroughly investigated through a systematic examination of temperature curves at varying Reynolds number values. The results demonstrate significant enhancements in flow characteristics attributed to the presence of these baffles. The flow structure exhibits prominent main currents across the gaps and secondary currents through the holes. The inclusion of these barriers leads to significant deformations and the emergence of well-developed recycling cells in the form of vortices. Both the perforated and inclined baffles effectively reduce pressure values on their frontal regions, thereby mitigating friction losses. Furthermore, the introduction of a perforation in the lower part of the baffle induces a more turbulent flow compared to the other cases. This is attributed to the expansion of the recirculating cells, resulting in improved fluid mixing and subsequent enhancement of thermal energy gain. These findings offer valuable insights into the design and optimization of heat exchangers, enabling improved performance and efficiency in various engineering applications.
PAPER REVISED: 2023-03-21
PAPER ACCEPTED: 2023-05-24
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THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 4, PAGES [3269 - 3280]
  1. Rebhi, R., et al., Forced-Convection Heat Transfer in Solar Collectors and Heat Exchangers: A Review, Journal of Advanced Research in Applied Sciences and Engineering Technology, 26 (2022), 3, pp. 1-15
  2. Singh, S., et al., A Detailed Insight Into the Optimization of Plate and frame Heat Exchanger Design by Comparing Old and New Generation Metaheuristics Algorithms, Journal of the Indian Chemical Society, 99 (2022), 2, 100313
  3. Kucuk, H., The Effect of Minichannels on the Overall Heat Transfer Coefficient and Pressure Drop of a Shell and Tube Heat Exchanger: Experimental Performance Comparison, International Journal of Thermal Sciences, 188 (2023), June, 108217
  4. Kim, M., et al., Air-Side Heat Transfer Enhancement in Fin-Tube Heat Exchangers Using Forced Vibrations Under Various Conditions, International Communications in Heat and Mass Transfer, 144 (2023), May, 106798
  5. Menni, Y., et al., A Review of Solar Energy Collectors: Models and Applications, Journal of Applied and Computational Mechanics, 4 (2018), 4, pp. 375-401
  6. Mohammed Hussein, H. A., et al., Structure Parameters and Designs and Their Impact on Performance of Different Heat Exchangers: A Review, Renewable and Sustainable Energy Reviews, 154 (2022), Feb., 111842
  7. Mangrulkar, C. K., et al., Recent Advancement in Heat Transfer and Fluid-flow Characteristics in Cross Flow Heat Exchangers, Renewable and Sustainable Energy Reviews, 113 (2019), Oct., 109220
  8. Douadi, O., et al., A Conceptual Framework for Waste Heat Recovery from Compression Ignition Engines: Technologies, Working Fluids & Heat Exchangers, Energy Conversion and Management: X, 16 (2022), Dec., 100309
  9. Jafari, S. M., et al., Designing and Application of a Shell and Tube Heat Exchanger for Nanofluid Thermal Processing of liquid Food Products, Journal of food process engineering, 41 (2018), 3, 12658
  10. Gil, J. D., et al., A Review from Design to Control of Solar Systems for Supplying Heat in Industrial Process Applications, Renewable and Sustainable Energy Reviews, 163 (2022), July, 112461
  11. Habibishandiz, M., Saghir, M. Z., A Critical Review of Heat Transfer Enhancement Methods in the Presence of Porous Media, Nanofluids, and Microorganisms, Thermal Science and Engineering Progress, 30 (2022), May, 101267
  12. Menni, Y., et al., Enhancement of Convective Heat Transfer in Smooth Air Channels with Wall-Mounted Obstacles in the Flow Path: A Review, Journal of Thermal Analysis and Calorimetry, 135 (2019), Apr., pp. 1951-1976
  13. Menni, Y., et al., Nanofluid Transport in Porous Media: A Review, Special Topics & Reviews in Porous Media: An International Journal, 10 (2019), 1, pp. 49-64
  14. Menni, Y., et al., Nanofluid-flow in Complex Geometries - A Review, Journal of Nanofluids, 8 (2019), 5, pp. 893-916
  15. Menni, Y., et al., Advances of Nanofluids in Solar Collectors - A Review of Numerical Studies, Math. Model Eng. Probl., 6 (2019), 3, pp. 415-27
  16. Menni, Y., et al., Enhancement of the Turbulent Convective Heat Transfer in Channels Through the Baffling Technique and Oil/Multiwalled Carbon Nanotube Nanofluids, Numerical Heat Transfer, Part A: Applications, 79 (2020), 4, pp. 311-351
  17. Menni, Y., et al., Improvement of the Performance of Solar Channels by Using Vortex Generators and Hydrogen Fluid, Journal of Thermal Analysis and Calorimetry, 147 (2022), 1, pp. 545-566
  18. Menni, Y., et al., Effects of In-Line Deflectors on the Overall Performance of a Channel Heat Exchanger, Engineering Applications of Computational Fluid Mechanics, 15 (2021), 1, pp. 512-529
  19. Menni, Y., et al., Effects of Two-Equation Turbulence Models on the Convective Instability in Finned Channel Heat Exchangers, Case Studies in Thermal Engineering, 31 (2022), Mar., 101824
  20. Menni, Y., et al., Baffle Orientation and Geometry Effects on Turbulent Heat Transfer of a Constant Property Incompressible Fluid-flow Inside a Rectangular Channel, International Journal of Numerical Methods for Heat & Fluid-flow, 30 (2020), 6, pp. 3027-3052
  21. Demartini, L. C., et al., Numeric and Experimental Analysis of the Turbulent Flow Through a Channel with Baffle Plates, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 26 (2004), 2, pp. 153-159
  22. Mahdi, K., et al., Using Obstacle Perforation, Reconfiguration, and Inclination Techniques to Enhance the Dynamic and Thermal Structure of a Top-Entry Channel, Thermal Science, 26 (2022), Special Issue 1, pp. S475-S484
  23. Nasiruddin, Siddiqui, M. H., Heat Transfer Augmentation in a Heat Exchanger Tube Using a Baffle, International Journal of Heat and Fluid-flow, 28 (2007), 2, pp. 318-328
  24. Launder, B., Spalding, D., The Numerical Computation of Turbulent Flows, Computer Methods in Applied Mechanics and Energy, 3 (1974), 2, pp. 269-289
  25. Patankar, S. V., Numerical Heat Transfer and Fluid-flow, McGraw-Hill, New York, USA, 1980
  26. Leonard, B. P., Mokhtari, S., ULTRA-SHARP Nonoscillatory Convection Schemes for High-Speed Steady Multidimensional Flow, NASA TM 1-2568, NASA Lewis Research Center: Cleveland, O., USA, 1990

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence