Theoretical and Numerical Study on the Plume Rising by Spherical Heating Element

Abstract

Contaminants and particulate matter in the air are known to be serious health threats to the elderly and children with poor respiratory function. In order to filter such fine particles in the air, a household air cleaning device can be used indoors, but there is no specific solution for outdoor use. Recently, China introduced a huge chimney that purifies contaminated air. The principle behind the chimney is the installation of a large glass structure at the lower part of the chimney. The air beneath the glass is then heated by solar radiation and allowed to pass through a fibrous filter to be purified as it rises. In a similar concept, this study proposes a method of removing contaminants around the city at high elevation using solar radiation and a large, black spherical-shaped body. We developed a model of the large black sphere generated by solar radiation, and designed a massive air lifting model to remove polluted air. The buoyancy and plume phenomena around the sphere were analyzed and compared using a theoretical equation and numerical analysis method. Keywords: Black Body, Solar Radiation, Large Sphere, Buoyant Plum, Air Purify, Contaminated Air