| Summary: | 碩士 === 國立臺灣海洋大學 === 機械與機電工程學系 === 96 === Although air conditioning equipment provides comfortable environment for modern life, the natural airing is a better option from the viewpoint of environmental protection and human health. Natural airing can be classified into two categories: wind-driven and stack airing. The mechanism of the wind-driven flow is due to the differential pressure between windward and leeward sides of a building.
In this work, the effects of location of an indoor object on the flow field were studied by using a CFD code “CFD-ACE+”. Twelve cases which correspond to twelve different locations were considered. Composed of jet flow, wake flow and stream collisions, the indoor flow field was essentially turbulent. K-εturbulent model was employed to analyze the indoor flow. Some of the results were compared with that obtained by using the Large Eddy Simulation model.
The velocity and turbulent viscosity distributions were solved for the twelve cases along with a case of no indoor object. Through comparing the turbulent viscosity distributions among different cases, case 6 was found to be a better arrangement. This case was analyzed again by using the Large Eddy Simulation model. The agreement for the velocity profiles between two turbulent models was found to be satisfactory.
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