Transient numerical simulation of coupled heat and moisture flow through a green roof. (October 2018)

• Record Type: Journal Article
• Authors: Škerget, L.; Tadeu, A.; Brebbia, C.A.
• Is Part Of: Engineering analysis with boundary elements. Volume 95(2018)
• Page Start: 53
• Page End: 68
• Publication Date: 2018-10
• Subjects: Green roofs -- Coupled heat and moisture transport through the canopy -- The soil and the structural support -- Transient numerical simulation and modelling -- Boundary element method; Boundary element methods -- Periodicals; Engineering mathematics -- Periodicals; Équations intégrales de frontière, Méthodes des -- Périodiques; Mathématiques de l'ingénieur -- Périodiques; Boundary element methods; Engineering mathematics; Periodicals; 620.00151
• DOI: 10.1016/j.enganabound.2018.06.018
• Languages: English
• ISSNs: 0955-7997

Abstract

Abstract: The paper reports a mathematical model governing unsteady coupled moisture and heat energy transport through a green roof, e.g. the canopy (leaf cover), the soil and the structural support. The mathematical model that governs the transport phenomena in the canopy is represented by a system of nonlinear ordinary differential equations (ODEs) for the unknown temperature of the plants, and the unknown temperature and moisture content of the canopy air. A set of nonlinear partial differential equations (PDEs) describe the heat and moisture transport through the soil and structural support. Continuous field functions such as temperature and relative humidity, are considered as the driving potentials. A finite difference numerical model is used to solve the ODEs and the boundary element numerical model is used to discretize the PDEs.