Abstract
Natural convection heat transfer within nanofluid porous cavities with local heaters occurs in different engineering applications. Therefore, analysis of nanofluid flow and heat transfer patterns in such systems has a significant value for development of industry. In the present study, free convection of nanofluid in a tilted porous cavity with a local isothermal heater has been investigated numerically. Governing equations with corresponding initial and boundary conditions formulated using the Darcy–Boussinesq model and local thermal non-equilibrium approach have been solved by the finite difference method under the effects of Brownian diffusion and thermophoresis. Effects of heater location (δ = 0.1–0.3) and dimensionless length (D = 0.2–0.8) as well as cavity inclination angle (γ = 0–π/2) and interphase heat transfer coefficient (H = 10–1000) on nanofluid flow and heat transfer have been studied for the following values of other governing parameters: Rayleigh number (Ra = 105), Prandtl number (Pr = 6.82), Darcy number (Da = 10−3), porosity of porous medium (ε = 0.5), buoyancy ratio parameter (Nr = 1), Brownian diffusion parameter (Nb = 10−6), thermophoresis parameter (Nt = 10−6), Lewis number (Le = 1000), thermal diffusivity ratio (Γ = 649.7) and heat capacitance ratio (ξ = 3.4). It has been found the heat transfer enhancement and convective flow attenuation when the distance between the heater and the cold vertical wall reduces.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.