Anisothermal flow dynamics in ventilated open space involved with indoor comfort

• Published in: International journal of thermal sciences 2023-01, Vol.183, p.107805, Article 107805
• Main Authors: Bennacer, Rachid, Ma, Xiaoyan
• Format: Article
• Language: English
• Subjects: Engineering Sciences
• ISSN: 1290-0729; 1778-4166
• DOI: 10.1016/j.ijthermalsci.2022.107805

Energy cooling systems or thermal buildings are increasingly fertile subject for reducing the energy demand or for the indoor air quality coupled with energy demand. This work is devoted to studying cooling ability within an open domain. The space model is considered as a cavity heated on one external sidewall and cooled by three vertical boards which separate the room into four sub-domains. A complex flow structure is obtained in the present “cooperating” case, in which dynamic and buoyancy forces are added together on the active wall. It shows that the natural convection and the forced flow (injection) act directly on the resulting patterns, heat exchange, mixing ability, which control the thermal field homogeneity and the cooling necessity. The computation results show the influence of the parameters and the vertical boards on heat transfer in the enclosure. Under the wide range of Rayleigh (Ra) and Reynolds (Re) numbers, the features of dynamic and thermal fields permit to categorize the different convection phenomena. The intensity of mixing was quantified versus Ra and Re and we find the conditions and threshold of the different domains (diffusive, natural, forced and mixed convection).