Abstract
The present work is dedicated to the three-dimensional numerical study of mixed convection heat transfer, taking place within a ventilated cavity (of shape L) crossed by Cu-water nanofluid. The enclosure is subjected to the action of a magnetic field. The ventilation is assured by two openings of the same size. The cold flow enters by an opening practiced at the top of the left wall, and exits by another opening practiced at the bottom of the right vertical wall. All the cavity walls are maintained at the same temperature, superior to that of the entering flow, except the side walls which are considered as adiabatic. The control parameters are: the Reynolds number and the Hartmann number as well as the nanoparticles volume fraction.
Highlights
Mixed convection heat transfer in vented cavities has a wide variety of technological applications such as cooling of electronic device, solar collector, home ventilation and etc [1]
Ghasemi et al [15], Mahmoudi et al [16] and Ghasemi [17] examined the effects of nanofluids and magnetic field on natural convection in square, triangular and U-shaped cavities, respectively, in which they denoted that, the magnetic field resulted in the decrease of convective cell flow within the enclosures and as a result a reduction of heat transfer rate
Elshehabey et al [18] studied the natural convection in an inclined L-shaped enclosure filled with Cu-water nanofluid with differentially heated walls in the presence of an inclined magnetic field
Summary
Mixed convection heat transfer in vented cavities has a wide variety of technological applications such as cooling of electronic device, solar collector, home ventilation and etc [1]. Ghasemi et al [15], Mahmoudi et al [16] and Ghasemi [17] examined the effects of nanofluids and magnetic field on natural convection in square, triangular and U-shaped cavities, respectively, in which they denoted that, the magnetic field resulted in the decrease of convective cell flow within the enclosures and as a result a reduction of heat transfer rate. They argued that, the use of nanofluids could enhance the heat transfer rate. A good enhancement in the heat transfer rate can be obtained by adding the copper nanoparticles to the pure fluid
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