Oronzio Manca*, Sergio Nardini, Daniele Ricci
Frontiers in Heat and Mass Transfer, Vol.2, No.1, pp. 1-8, 2011, DOI:10.5098/hmt.v2.1.3007
Abstract Convective heat transfer may be enhanced passively by adopting rough surfaces. Ribs break the laminar sub-layer and create local turbulence in the
channel, reducing thermal resistance and enhancing the heat transfer. However, higher losses are expected. In this paper a numerical investigation is
carried out on air forced convection in a rectangular ribbed channel. A three-dimensional model is developed to study the effect of the angle between
the fluid flow direction and the ribbed surface, provided with rectangular turbulators, in the turbulent flow. Simulations s that Nusselt numbers as
well as the pressure drops increase as the inclination angles increase. More >
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