Coupled Heat and Moisture Transfer in Multi wall Under Periodic Boundary Conditions

Abstract:

With the temperature and water vapor gradient being chosen as the driven potential,the coupled heat and moisture equations were established in multi wall.Under the periodic conditions,the coupled equations were solved by a numerical method,and the Fluent was used to modify the scalar equation.The numerical results were also compared with the experimentally measured data reported in the literature.Water vapor pressure and heat flux distribution were computed.The results show that in winter,condensation occurs in the interface between the interior insulation and brick;but for the exterior insulation,condensation never occurs either in winter or summer.