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題名 | 應用定水頭試驗儀於大孔隙結構之流場特性探討=Flow Characteristics inside Large Porous Structure by Constant Head Device |
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作者 | 陳震遠; 李忠潘; Chen, Chen-yuan; Lee, Chung-pan; |
期刊 | 中正嶺學報 |
出版日期 | 20031100 |
卷期 | 32:1(A) 民92.11 |
頁次 | 頁1-15 |
分類號 | 443.3 |
語文 | chi |
關鍵詞 | 孔隙介質; 滲透係數; 紊流係數; 孔隙率; Porous media; Intrinsic permeability; Turbulent coefficient; Porosity; |
中文摘要 | 本研究乃利用設計的大型定水頭透水儀器實際量測粒狀物之透水特性。隨流場變化所分析之阻 力靜、數可進一步由圖表呈現其趨勢,並比較計算數值之結果;介質特性同時可由粒徑大小、比滲透靜、數、孔隙率來其體化。文中之重點乃針對各種規則粒徑及不規則石料之比滲透像數及阻力係數關係深入之推論及研究,以為進一步研究孔隙介質內流場特性之基礎。本研究所採用之孔隙材料為不同粒徑之碎石及玻璃珠,可顯示出形狀、光滑度以及粒徑大小等變因對滲透條數與特性阻力係數之影響。此些數值更可引發未來對消波特性之研究。 |
英文摘要 | The permeability and resistance characteristics in porous structures with different grain size and shape have been studied experimentally in the paper. The author analyses the experimental raw data via former experienced equation (Sollitt and Cross, 1972) and to compare with new equation from deriving himself by real physical concept further. This indicates the coefficient will change significantly as the grain size Reynolds number varies and is not constant in a non-uniform flow field such as in a wave field. Figures show that porous-structure characteristics like intrinsic permeability and turbulent coefficient tend to steady under high Reynolds number. than former equation. |
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