menni, y. abou bekr belkaid university - faculty of sciences - department of physics, research unit of materials and renewable energies (urmer), Algeria , azzi, a. abou bekr belkaid university - faculty of sciences - department of physics, research unit of materials and renewable energies (urmer), Algeria , zidani, ch. abou bekr belkaid university - faculty of sciences - department of physics, research unit of materials and renewable energies (urmer), Algeria

NUMERICAL ANALYSIS OF TURBULENT FORCED CONVECTION IN A CHANNEL WITH FLAT AND DIAMOND-SHAPED BAFFLES OF DIFFERENT HEIGHTS

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Forced-convection airflow characteristics were examined for a constant property fluid flowing turbulently through a rectangular channel with staggered, transverse baffles and a constant temperature along both walls. Two models of baffles were considered in this study, flat and/or diamond-shaped baffles. Computations were carried out in the steady-state for different baffle heights. The fluid flow and heat transfer characteristics are simulated using software CFD ANSYS FLUENT 14.0. The influence of the diamond shape on the convective heat transfer phenomenon is shown and this in comparing the results of this type with those of the flat baffle. The computational results reveal essentially, that the shape of the obstacle can alter substantially the airflow and heat transfer behaviors. In addition, it is shown that an increase in the deflector height cause a substantial increase in the fluid velocity and heat transfer but the friction loss is also very significant for both cases studied.

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Turbulent forced convection , diamond baffle , flat baffle , rectangular channel , CFD

Courrier Du Savoir

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