CFD Simulation and Experimental Investigation of Convection Heat Transfer in a Rectangular Convergent Channel with Staggered Ribs

K. Sivakumar; E. Natarajan; N. Kulasekharan

doi:10.15866/ireme.v7i3.3793

CFD Simulation and Experimental Investigation of Convection Heat Transfer in a Rectangular Convergent Channel with Staggered Ribs

K. Sivakumar^(1*), E. Natarajan⁽²⁾, N. Kulasekharan⁽³⁾

^(*) Corresponding author

Authors' affiliations

DOI: https://doi.org/10.15866/ireme.v7i3.3793

Abstract

Forced convection heat transfer of air in a rectangular convergent channel with 90˚ ribs on bottom wall was investigated experimentally and numerically. The copper test section was inlet 100 mm×80 mm×5 mm and outlet 100 mm×74 mm×5 mm convergent rectangular channel with ribs were 3,6 and 9 mm square with 60 mm pitch distance for each 4 numbers of ribs were attached in the bottom surface of the test channel. The tests investigated the effect of air mass flow rate on the convection heat transfer enhancement with the above sized ribs. Comparisons between the experimental and numerical results showed that the RNG k−ε turbulence model. The numerical model was created as per the same dimension of experimental test section channel size and three different sized ribs are mounted at the bottom surface of the test section. The experimental investigation and numerical analysis was conducted for the Reynolds number 20,000. From the experimental and numerical results indicate that the heat transfer coefficients for 6mm sized ribbed channel were largest among the three sized ribs.
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Keywords

Rib Turbulators; Turbulent Flow; Heat Transfer; Friction Factor

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