甲谷寿史

"Simultaneous Calculation of Inflow Direction and Flow rate at Cross Ventilated Large Opening"
「通風用大開口部を通過する気流速と流入角度の数値計算」

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In case of cross ventilation through the large opening, it is well known that the inflow direction at the opening is not normal to the opening. Authors proposed the simplified prediction method of the inflow direction at the inlet opening and the airflow rate simultaneously. It is also well known that the use of general discharged coefficient values (CD) is not suitable for the calculation of cross ventilation rate. First reason is that the simple connection of the pressure loss coefficient of an opening (ζ as the reciprocal of square CD) in series under-estimates the airflow rate. Secondly, CD varies according to the wind direction and the use of normal values over-estimates the airflow rate. Therefore, the proposed method uses the total pressure loss coefficient of the room (ξ) instead of ζ (or CD). The wind tunnel tests using a three-storied apartment building model with a room were conducted to investigate the inflow direction and the flow rate. The combination of the room positions and the external wind directions make various inflow directions at the inlet opening. The results were compared with the calculated results.

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大阪大学大学院工学研究科地球総合工学専攻（建築工学部門）助手．
1990年大阪大学卒業，1992年博士前期課程修了．1992年より大阪大学に勤務．2003年博士（工学）の学位取得．2003年スウェーデン・イエブレ大学及びデンマーク・オールボー大学にて客員研究員を兼任．
自然換気及び通風に関する研究に従事し，現在は大開口の風力換気現象に取り組んでいる．また機械換気やハイブリッド換気に関する多数の研究プロジェクトにも参画している。