Numerical study of heat transfer enhancement in parallel-plate channels with rotating baffles


  • Amine Brahimi
  • Redha Rebhi
  • Mounir Alliche
  • Faouzi Didi



deflector, H2, heat transfer, forced convection, turbulent flow


The present work aims to improve the heat transfer rate in a rectangular channel. To improve the dynamic and thermal characteristics, a deflector is inserted on the axis of the thermal channel. The inclination angles of the deflector are taken into account, α = 90°, 70°, 50° and 30°.H2 gas, which has high thermal conductivity, used to significantly improve the overall thermal performance of various types of thermal equipment. The average Nusselt number is improved by the angle of inclination of the deflector (α = 90°). The Nusselt number (Nu) also increases the temperature difference between the wall surface and the H2 gas, resulting in good cooling for different Reynolds numbers, Re = 5000, 10000, 15000, 20000 and 25000.


Kumar, A.; Kim, M.H. Convective heat transfer enhancement in solar air channels. Appl. Therm. Eng,89 (2015), pp. 239–261.

Liu, J., et al., Heat transfer characteristics in steam-cooled rectangular channels with two opposite rib-roughened walls,Appl. Therm. Eng, 2013, 50, 104–111.

Ali, M,et al., Forced convection heat transfer over horizontal triangular cylinder in cross flow,Int. J.Therm. Sci,50 (2011), pp. 106–114.

Kumar, A., et al., Heat transfer and friction correlations for artificially roughened solar air heater duct with discrete W-shaped ribs, Energy Convers. Manag,50 (2009), pp. 2106–2117.

Karwa, R., et al.,Experimental study of heat transfer enhancement in an asymmetricallyheated rectangular duct with perforated baffles,Int. Commun. Heat Mass Transf,32 (2005), pp. 275–284.

Kabeel, A.E., et al., Influence of fin height on the performance of a glazed and bladed entrance single-pass solar air heater,Sol. Energy,162 (2018), pp. 410–419.

Bemar, C., et al., Numerical study of fluid flow and heat transfer in a parallel plate channel with baffles, Journal of Heat Transfer, (1984), pp. 106-743

Webb, B. W., et al., Conjugate heat transfer in a channel with staggered ribs, Int. J. Heat and Mass Transfer, 28 (1985), pp. 1679-1687

Patankar, S., et al., Fully developed flow andheat transfer in ducts having streamwise-periodic variations of cross-sectional area, Journal of Heat Transfer, 99 (1977), pp. 180-186

Kellar,K.M., et al., Numerical Prediction of Flow and Heat Transfer In. Parallel Plate Channel with Staggered Fins,Journal of Heat Transfer, 109 (1987), pp. 25-30

Cheng, C.H, et al., Numerical prediction for laminar forced convection in parallel-plate channels with transverse fin arrays, International Journal of Heat and Mass Transfer 34,11(1991),pp. 2739-2749

Cheng,C.H., et al., International Journal Heat Mass Transfer, 1991 (2000),pp. 1315-1324

Lopez,J.R.,et al., A numerical analysis of laminar convectiveheat transfer in a three-dimensional channel with baffles, Proceedings of the Third U.S.National Congress on Computational Mechanics, Dallas, TX,1 (1995),pp. 406-416

Yuan,Z.X., et al., Numerical prediction for laminar forced convection heat transfer in parallel- plate channels with stream wise-periodic rod disturbances, Int. J.Numerical Methods in Fluids, 28 (1998),pp. 1371-1387

Hwang,R.R, et al., Numerical study of turbulent flow over-towdimensional surface-mounted ribs in a channel, InternationalJournal for Numerical Methodsin Fluids,37(1999), pp. 767-785

Yang,Y.T., et al., Calculation of turbulent flow and heat transfer in a porousbased channel, Int J. Heat Mass Transfer, 46 (2003), pp. 771-780

Bazdidi,F., et al.,Numerical Analysis of Laminar Heat Transfer in Entrance Region of a Horizontal Channel with Transverse Fins, InternationalCommunications in Heat and Mass Transfer, 31, 2 (2004), pp. 211-220

Tsay,Y.L., et al.,Heat transfer enhancement of backward-facingstep flow in a channel by using baffle installed on the channel wall, Acta Mech,174 (2005), pp. 63-76

Acharya, al.,Developing and Periodically Developed Flow, Temperature and Heat Transfer in a Ribbed Duct, Int. J. Heat Mass Transfer, 40 (1997), pp. 461-479

Wilfried,R., et al.,Effect of baffle/shell leakage flow on heat transfer in shell-and-tube heat exchanger, Experimental Thermal and Fluid Science, 8 (1994), pp. 10-20

Gupta, B.B., et al.,A helical baffle for cross-flow microfiltration, Journal of Membrane Scienc, 99 (1995), pp. 31-42

Kang,Aet al.,Use of porous baffles to enhance heat transfer in arectangular channel, International Journal of Heat and Mass Transfer ,46 (2003), pp. 4191- 4199

Tandiroglu, A., Effect of flow geometry parameters on transient heat transfer for turbulent flow in a circular tube with baffle inserts,International Journal of Heatand Mass Transfer ,49(2006), pp. 1559-1567

Yong,G.,et al., Design and optimization of heat exchangers with helical baffles, Chemical Engineering Science, 63 (2008), pp. 4386-4395

Rajendra,K.,etal., Experimental study of heat transfer enhancement in an asymmetrically heated rectangular duct with perforated baffles, International Communications in Heat and Mass Transfer 32 (2005), pp. 275-284

Wang, Q.W., et al., Experimental study of heattransfer enhancement in narrow rectangular channel with longitudinal vortex generators,Nuclear Engineering and Design, 237(7) (2007), pp. 686-693

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(2) (2004), pp. 153-159

Yang, Y.T. et al., Calculation of turbulentflow and heat transfer in a porous-baffled channel. International Journal of Heat and Mass Transfer, 46(5) (2003), pp. 771-780

Launder,B.E., et al., Computer Methods inApplied Mechanics and Engineering,3(1974), pp. 269-289

Nasiruddin,S.,etal.,Heat transfer augmentation in a heat exchanger tube using a baffle.International Journal of Heat and Fluid Flow, 28(2)(2007),pp. 318-328

Patankar, S.V.,Numerical heat transfer and fluid flow, McGraw-Hill, (1980)New York

Leonard, B. P.,et al.,Ultra-sharp nonoscillatory convection schemes for high-speed steady multidimensional flow,NASA TM 1-2568, NASA Lewis Research Center,26(1990), pp.153-159

COMPARAÇÃO da fibra acrílica e da fibra de borracha nas propriedades físicas e mecânicas do concreto f'c= 280 kg/cm2por Sandoval, Aldair [et al]. Brazilian Journal of Technology[en línea]. Vol. 6 Nº1:2-13, Janeiro 2023 [consultado el 24 de julio de 2023]. Disponible en: 2595-5748.

ADIÇÃO de resíduos de café e cana-de-açúcar na resistência à compressão e à tração do concreto estrutural por Perez, Fiorela [et al]. Brazilian Journal of Technology[en línea]. Vol.6 N1:14–24, Janeiro 2023[consultado el 24 de julio de 2023].Disponible en: 2595-5748




How to Cite

Brahimi, A., Rebhi, R., Alliche, M., & Didi, F. (2024). Numerical study of heat transfer enhancement in parallel-plate channels with rotating baffles. Brazilian Journal of Technology, 7(1), 175–195.



Original articles