Numerical and experimental determination of optical properties and thermal conductivity of ceramic composites based on fumed silica and silica fiber

Numerical simulation for the determination of the radiative properties of spherical packed bed porous media: A COMSOL Multiphysics Study

“…and varying between numerical calculations 14,15 and experimental measurements. 7,8 Considering the complex character of radiative transfer in spherical packed bed porous media, the most commonly adopted approach has been to assume the medium as statistically continuous and homogeneous and to consider effective radiative properties using the radiative transfer equation (RTE). This approach was initially suggested by Tien and co-workers 16,17 and then by Singh and Kaviany.…”

“…On that basis, identifying its radiative properties has turned out to be a complex and difficult task. For that, in many thermal designs, such as powder-insulation systems, 8 high-temperature catalytic reactors, 9 pebble-bed type nuclear reactors 10 etc., the porous medium can be viewed as a spherical packed bed with a special and regular structure. Several studies have been conducted to model the radiative transfer in packed beds of spherical particles including the works of Mohammadnejad and Hossainpour, 11 Randrianalisoa and Baillis, 12 Wu et al 13 etc.…”

“…In Environmental Engineering, the findings can improve the efficiency of radiative cooling systems and solar receivers 49 for eco-friendly cooling and heating. Materials Science can also benefit from the results by developing advanced materials with specific radiative characteristics for insulation 8 and energy storage. Moreover, the relevance of this study extends to Biomedical Engineering, 50 Aerospace Engineering, 51 and Manufacturing Processes 52 etc.…”