Two numerical modelings of free convection heat transfer using nanofluids inside a cavity
Douglas Hector Fontes1; Daniel Dall'Onder dos Santos1; Elie Luis Martínez Padilla1; Enio Pedone Bandarra Filho1
1 Federal University of Uberlândia
doi:10.20906/CPS/COB-2015-2053
Resumo
This work presents numerical results of natural convection flows of water-copper nanofluids inside a square enclosure. Two different numerical methods are employed to approximate the mechanical modeling, namely the finite volume and the finite element methods. The studied nanofluid volumetric concentrations range from 0.1 to 1.0%, with the fluid properties obtained employing experimental and theorical correlations. The simulated nanofluid and water flows have a Rayleigh number ranging from 10^3 and 10^5. The results show almost no difference on the Nusselt number profiles between nanofluids and water, although the convection coefficient is increased on the nanofluids when compared to the base fluid due to the increase on the thermal conductivity.
Palavras-chave: water-copper nanofluids; water-natural convection heat transfer; numerical approximation; Galerkin least-squares method