Mathematical Model Using Discrete-Continuous Approach for Moisture Transfer in Enclosing Construction

[摘要] The paper presents an unsteady-state calculation method for single-layer enclosing structures moisture regime using a discrete-continuous approach. A new formula allowing moisture potential distribution determination along enclosing structure thickness in any section, at any moment of time, under continuous control for temperature field is introduced. The proposed method was verified by finite difference method using an explicit difference scheme. Single-layer enclosing structure moisture regime calculation results obtained by various moisture potential methods are compared. Calculations using the proposed method give quantitative and qualitative results similar to Gagarin's unsteady-state method, but are described by calculated expression. Results of this research can be used in practice by design engineers.

[发布机构] Department of Heat and Gas Supply and Ventilation, Moscow State University of Civil Engineering, Yaroslavskoye Shosse, 26, Moscow; 129337, Russia^1

[关键词] Calculation results;Continuous approach;Continuous control;Explicit difference schemes;Moisture transfer;Potential distributions;Potential methods;Unsteady-state methods