University of Khartoum

Rainfall Variations and Trends in Greater Kordofan: As Indicators of Climatic Change in the Sudan

Rainfall Variations and Trends in Greater Kordofan: As Indicators of Climatic Change in the Sudan

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Title: Rainfall Variations and Trends in Greater Kordofan: As Indicators of Climatic Change in the Sudan
Author: Elfaig, Ahmed H.; Yassin, Mohamed E.
Abstract: One of the most popular ways of evaluating outdoor thermal comfort is using the typical weather data as input boundary condition of CFD simulation, and then using the CFD result to calculate thermal comfort index distribution. But because of the complexity of outdoor environment, this specific hour may don。ッt even exist. It is hard to say what the result represents and the meaning of simulating is vague. So that a more detailed method is necessary to analyze the outdoor thermal condition. To run an annual analysis, some simplification should be considered. Wind weather data is specified into 16 directions and each direction is simulated using CFD tool. In each direction Reynolds analogy is assumed to get the velocity distribution of different inflow velocity. To simplify the calculation of radiation heat exchange, only short wave radiation at day time and long wave radiation with the sky at nighttime is considered. A simple residential area is modeled to show the process of annual analysis and an integral thermal comfort index based on PET (Physiological Equivalent Temperature) is proposed to evaluate the average outdoor thermal condition.
URI: http://khartoumspace.uofk.edu/123456789/22088
Date: 2009


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