Effect of Nanoparticles and Base Fluid Types on Natural Convection in a Three-Dimensional Cubic Enclosure
نویسندگان
چکیده
Convective heat transfer using nanofluids play an important role in thermal applications such as exchangers, automotive industries, and power generation. In this work, a numerical analysis is conducted to examine the of nanofluid three-dimensional differentially heated cavity. The finite volume method-based SIMPLEC algorithm used solve system mass, momentum, energy governing equations. left right vertical side walls cube are maintained at constant temperatures T C id="M2"> H , respectively. remaining insulated. Effective conductivity viscosity determined Brinkman Maxwell models, Studies carried out for three types nanoparticles fractions ( id="M3"> 0 – id="M4"> 5 % ). effects two binary liquid mixtures base fluid (propylene glycol-water ethylene glycol-water) also examined. Results show enhancement id="M5"> 13 Al2O3-EG comparison pure glycol case id="M6"> Ra = 10 3 . addition, was increased with rise nanoparticle fractions.
منابع مشابه
Entropy Generation of Double Diffusive Natural Convection in a Three Dimensional Differentially Heated Enclosure
Entropy generation of double diffusive natural convection in a three dimensional differentially heated enclosure has been performed numerically. Vertical walls of enclosure are heated differentially and remaining walls are adiabatic. The obtained results were presented via iso-concentration, iso-temperatures, velocity vector projection, particle trajectories, velocity profiles, iso-entropy, loc...
متن کاملNumerical study of fins arrangement and nanofluids effects on three-dimensional natural convection in the cubical enclosure
This investigation is a three dimensional comprehensive heat transfer analysis for partially differentially heated enclosure with the vertical fin mounted on the hot wall. The thermal lattice Boltzmann based on D3Q19 method is utilized to illustrate the effects of vertical fins and nanoparticles on the flow and thermal fields. The effects of Rayleigh number and different arrangement of fins on ...
متن کاملEffect of Variable Thermal Expansion Coefficient and Nanofluid Properties on Steady Natural Convection in an Enclosure
Steady state natural convection is numerically investigated in an enclosure using variable thermal conductivity, viscosity and thermal expansion coefficient of Al2O3–water nanofluid. This study has been conducted for a wide range of Rayleigh numbers (103≤ Ra ≤ 106), concentrations of nanoparticles (0% ≤ Φ ≤ 7%), enclosure aspect ratios (0.5 ≤ AR ≤ 2) and temperature differences between the cold...
متن کاملMHD Natural Convection and Entropy Generation of Variable Properties Nanofluid in a Triangular Enclosure
Natural convection heat transfer has many applications in different fields of industry; such as cooling industries, electronic transformer devices and ventilation equipment; due to simple process, economic advantage, low noise and renewed retrieval. Recently, heat transfer of nanofluids have been considered because of higher thermal conductivity coefficient compared with those of ordinary fluid...
متن کاملOscillatory Instability of Three- Dimensional Natural Convection of Air in a Laterally Heated Cubic Box
Transition from steady to oscillatory buoyancy convection of air in a laterally heated cubic box is studied numerically by straight-forward time integration of Boussinesq equations using a series of gradually refined finite volume grids. Horizontal and spanwise cube boundaries are assumed to be either perfectly thermally conducting or perfectly thermally insulated, which results in four differe...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Mathematical Problems in Engineering
سال: 2021
ISSN: ['1026-7077', '1563-5147', '1024-123X']
DOI: https://doi.org/10.1155/2021/8882790