Title :
The study on heat, mass transfer and stress of porous medium vacuum drying
Author :
Zhijun, Zhang ; Chenghai, Xu ; Shiwei, Zhang ; Lili, Zhao
Author_Institution :
Sch. of Mech. Eng. & Autom., Northeastern Univ., Shenyang, China
Abstract :
Porous medium vacuum drying is a complicated heat and mass transfer process. Based on theory of energy and mass balance, a moisture model for vacuum drying porous medium was constructed. The model is implemented and solved with two-dimensions by finite element method (FEM). The temperature, moisture and pressure inner porous medium is discussed. The moisture temperature, and moisture and temperature stress inner porous medium is simulated. The results show that the temperature stress is the larger than the moisture stress, the total stress is the drag stress. The pressure gradient is far then the moisture and temperature stress, and the effect of pressure on drying quality can be not ignored.
Keywords :
drag; drying; finite element analysis; heat transfer; mass transfer; porous materials; FEM; drag stress; energy balance; finite element method; heat transfer; mass balance; mass transfer; moisture model; moisture stress; moisture temperature; porous medium; pressure gradient; temperature stress; vacuum drying; Computational fluid dynamics; Equations; Finite element methods; Heat engines; Heat transfer; Mechanical engineering; Moisture; Solids; Stress; Temperature; computer Simulation; heat and mass transfer; modelling; porous medium; vacuuum drying;
Conference_Titel :
Computer Science and Information Technology, 2009. ICCSIT 2009. 2nd IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-4519-6
Electronic_ISBN :
978-1-4244-4520-2
DOI :
10.1109/ICCSIT.2009.5234789
