For boundary conditions, measured outdoor climates – including driving rain and solar radiation – are used.
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Nonetheless, the WUFI ® software requires only standard material properties and easy-to-determine moisture storage and liquid transport functions. WUFI ® is based on the latest knowledge in vapor diffusion and liquid transport in building materials. The methods have been validated world wide and provide realistic simulation of hygrothermal conditions in building components and buildings under actual climate conditions. WUFI ® performs dynamic simulations of coupled heat and moisture transfer. The Department of Hygrothermics at Fraunhofer IBP has developed the WUFI ® software family for state-of-the-art hygrothermic analysis. The current, state-of-the-art method: WUFI ®
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and redistribute the software and a guarantee of continued free use. It was meant to provide a general assessment of the hygrothermal suitability of a component, not to produce a simulation of realistic heat and moisture conditions in a component exposed to the weather prevailing at its individual location. 1) Flow Analysis through diffuser 2) CFD Analysis of Nozzle flow 3) CFD Analysis of. Furthermore, since the Glaser method only considers steady-state transport under simplified steady-state boundary conditions, it cannot reproduce individual short-term events or allow for rain and solar radiation. However, this method does not account for the capillary transport of moisture and for the sorption capacity of the component, both of which reduce the risk of damage in case of condensation. The traditional method for assessing the moisture balance of a building component has been the Glaser method (described in the DIN 4108 standard) which analyzes the vapor diffusion transport in the component. Analysis of the coupling of heat and moisture is known as “hygrothermics.” It is well known that high moisture levels result in higher heat losses, and the temperature conditions in building components influence the moisture transport. The thermal and moisture conditions and transport in buildings and building components are coupled. Long-term exposure to high moisture conditions can cause damage in building components, and significant health problems result from mold growth on surfaces that are exposed to high moisture conditions. In addition to accounting for the thermal response of buildings and building components it is necessary to also understand the moisture conditions and the effects of humidity.
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