Numerical investigation of heat transfer enhancement of nanofluids in an inclined lid-driven triangular enclosure

Abstract

The behavior of nanofluids is investigated numerically in an inclined lid-driven triangular enclosure to gain insight into convective recirculation and flow processes induced by a nanofluid. The present model is developed to examine the behavior of nanofluids taking into account the solid volume fraction δ. Fluid mechanics and conjugate heat transfer, described in terms of continuity, linear momentum and energy equations, were predicted by using the Galerkin finite element method. Comparisons with previously published work on the basis of special cases are performed and found to be in excellent agreement. Numerical results are obtained for a wide range of parameters such as the Richardson number, and solid volume fraction. Copper-water nanofluids are used with Prandtl number, Pr = 6.2 and solid volume fraction δ is varied as 0%, 4%, 8% and 10%. The streamlines, isotherm plots and the variation of the average Nusselt number at the hot surface as well as average fluid temperature in the enclosure are presented and discussed in detailed. It is observed that solid volume fraction strongly influenced the fluid flow and heat transfer in the enclosure at the three convective regimes. Moreover, the variation of the average Nusselt number and average fluid temperature in the cavity is linear with the solid volume fraction.

Electrohydrodynamic Nanofluid Hydrothermal Treatment in an Enclosure with Sinusoidal Upper Wall

“…They indicated that adding nanoparticles leads to rise in Nusselt number. Rahman et al [7] investigated nanofluid hydrothermal treatment in a tilted enclosure with moving wall. They proved that temperature enhances with rise of nanofluid volume fraction.…”

Investigation of Heat Transfer and Pressure Drop in Microchannel Heat Sink Using Al2O3 and ZrO2 Nanofluids

“…Nanofluid technology is one specific area where a homogenous mixture of nanoparticles and a base fluid is used to develop nanofluids. Such fluids have vast applications in tribology [ 27 , 28 ], heat transfer enhancement [ 29 , 30 , 31 , 32 ], and biomedical filed [ 33 , 34 , 35 ].…”

“…Since these fluids form a colloidal solution of the solid-liquid particles, therefore, the computational domain for nanofluids can be evaluated using either Eulerian or Lagrangian approach, depending upon the application. For a simplifying model, to minimize the computational effort, in engineering applications, like heat exchanger, the Eulerian approach is preferred [ 29 ]. However, in biomedical application, the Lagrangian approach is considered more effective, as the primary focus is on the study of Brownian motions and interaction of individual particles [ 33 , 36 ].…”

Influence of the Periodicity of Sinusoidal Boundary Condition on the Unsteady Mixed Convection within a Square Enclosure Using an Ag–Water Nanofluid

“…Yu et al [39] investigated the impact of nanofluids in a base-heated isosceles triangular enclosure using a transient buoyancy driven condition. Laminar mixed convection in an inclined triangular cavity [40,41] using a Cu-water nanofluid has been performed. The authors claimed that the inclined angle plays an important role for the nanofluids in the heat exchange.…”