... for thermal treatments. The characterization of nanofluids by solving an inverse parameter estimation problem was the main objective of this work. A nanofluid of Fe 2 O 3 nanoparticles dissolved in distilled water was heated by a diode laser, causing natural convection currents during the experiment...

... an improvement in the thermal or dynamic conditions of the device. Really, variations in heating conditions can be introduced directly, avoiding obstacles. The effect of discrete heat sources on the natural convection airflow inside an isolated solar chimney has been discussed experimentally and numerically...

... for two carboxyl methyl cellulose (CMC) solution concentrations. The results show that natural convection occurs earlier in the temperature-dependent fluid properties, which leads to attaining a desired level of sterility within a shorter time than the constant properties of the fluid. The variations...

...Gloria Biswal; Subhasisa Rath; Sukanta Kumar Dash In this work, numerical simulations are carried out to delineate the natural convection and surface radiation heat transfer characteristics of vertically oriented isothermal helical coils having a constant surface area. Numerical computations using...

...Basanta Kumar Rana; Jnana Ranjan Senapati An attempt has been made to study the natural convection around a hollow vertical cylinder numerically which is suspended in motionless power-law fluids in the laminar range. The influence of various non-dimensional pertinent parameters, such as Grashof...

...] Mohanty , A. , Senapati , S. K. , and Dash , S. K. , 2020 , “ Natural Convection Cooling of an Infrared Suppression Device (IRS) with Conical Funnels—a Computational Approach ,” Int. Commun. Heat Mass Transfer , 118 , pp. 1 – 13 . 10.1016/j.icheatmasstransfer.2020.104891 [6...

... material HTF temperature Stefan number natural convection LHTES conduction energy systems heat exchangers melting and solidification The annual global energy demand can be met through solar energy radiation falling on the earth’s surface in one day [ 1 ]. Despite the fact, fossil fuels...

..., such as temperature field, local Nusselt number distribution along the conducting walls, average Nusselt number, and velocity field. The experiment is performed to investigate laminar and steady natural convective flow in a water-enclosed cubic cavity with a left hot wall and a right cold wall. The analysis...

... limit imposed by the international standard for implantable devices. A 3D finite element model, including blood perfusion and natural convection fluid flow of the eye, was created. The device was placed 1.95 mm from the iris, which experienced less than 2°C rise in the tissue temperature at a maximum...

...Ajay Vallabh; P. S. Ghoshdastidar This paper presents a steady-state heat transfer model for the natural convection of mixed Newtonian-Non-Newtonian (Alumina-water) and pure non-Newtonian (Alumina-0.5 wt% Carboxymethyl Cellulose (CMC)/water) nanofluids in a square enclosure with adiabatic...

... a maximum temperature increase by 0.76 °C and 0.23 °C for a position of δ = 0.25 and =0.75, respectively, and a decrease by 0.3 °C for a position of δ = 0.5. Tilting to the same position always leaves the square enclosure warmer than the rectangular one. Natural convection develops by the appearance...

..., and (c) Ch1 = 0.9 In this section, the effect of volume fraction of nanoparticles on natural convection is studied for C h 1 = C h 2 = 0.5, at different Ha. Figure 18 shows significant variation in Nu av with the volume fraction. Because of substantial increase in the thermal...

... Email: amaresh@iitg.ernet.in 13 02 2020 15 10 2020 18 10 2020 30 12 2020 natural convection corrugated enclosure porous domain nano-fluids Nusselt number heat and mass transfer heat transfer enhancement micro/nanoscale heat transfer natural and mixed convection...

... are discussed in details. Email: hcj631216@yahoo.com.tw Email: chhsingy@gmail.com 09 03 2020 10 08 2020 13 08 2020 06 11 2020 zero nanoparticles flux natural convection vertical truncated cone porous media nanofluid heat and mass transfer natural and mixed convection...

.... As no input velocity is provided for the case of natural convection problem, the density difference causes this phenomenon of induced velocity and it is non-dimensionalized by multiplying with the fin height and dividing by the kinematic viscosity. Each variation in the property can be observed to have...

... than that of the HEU core. The GHARR-1 is cooled by natural convection where the coolant water is driven by the density differences of the coolant in the core. The coolant with heavier densities stays at the bottom, whereas the coolant with the lighter densities stays at the top of the core. Thus...

...Mustapha Faraji; El Mehdi Berra This paper reported the mathematical modeling and numerical simulation of natural convection flow of Cu/water nanofluid in a square enclosure using the lattice Boltzmann method (LBM). The cavity is heated from below by heat source and cooled by the top wall...

...Dileep V. Nair This work presents a simple method to improve natural convection heat transfer performance of horizontal-base straight-fin heat sink by adding partial shroud plates on top of the heat sink at both ends. Experiments are conducted in conjunction with a detailed three-dimensional (3D...

...António M. G. Lopes; Vítor A. F. Costa A numerical study is conducted concerning the improvement of radial plane fins heat sinks for natural convection cooling of light-emitting diode (LED) lamps. The main objective is to maintain the temperature of the heat sink base below a prescribed threshold...

...Tahar Tayebi; Ali J. Chamkha In this paper, steady natural convective heat transfer and flow characteristics of Al 2 O 3 -Cu/water hybrid nanofluid filled square enclosure in the presence of magnetic field has been investigated numerically. The enclosure is equipped with a wavy circular conductive...