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forced kinetic energy. The images shown exemplify the importance of viscous heat-
ing effects and temperature dependent viscosity on the dimensionless velocity and
temperature profiles.
5 Conclusions
The problem of laminar mixed convection in a rectangular enclosure has been studied
numerically by taking into account the effect of viscous dissipation and temperature-
dependent viscosity. Uniform wall temperatures with asymmetric heating have been
considered. The problemdepends on several non-dimensional parameters, such as the
Reynolds number, the Prandtl number, the Richardson number (buoyancy parame-
ter), the Brinkman number, the temperature-dependent viscosity and the geometrical
parameters of the enclosure. It has been shown that the effect of viscous dissipation
can be important on the heat and fluid flow phenomena in fluids with high Prandtl
number, with regions within the enclosure reaching fluid temperatures above the hot
wall temperature.
Acknowledgments
This work has been supported by the Consejo Nacional de la Ciencia y Tec-
nología (CONACyT), Grant No. 167474 and SIP-IPN 20131675.
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