| 研究生: |
蔡孟芳 Tsai, Meng-fang |
|---|---|
| 論文名稱: |
非均勻固體顆粒對賓漢流體流變參數之影響 Effect of non-uniform solid particles on rheological parameters of a Bingham fluid |
| 指導教授: |
詹錢登
Jan, Chyan-Deng |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 水利及海洋工程學系 Department of Hydraulic & Ocean Engineering |
| 論文出版年: | 2009 |
| 畢業學年度: | 97 |
| 語文別: | 中文 |
| 論文頁數: | 63 |
| 中文關鍵詞: | 極限濃度 、流變參數 、賓漢流體 、非均勻顆粒 |
| 外文關鍵詞: | Maximum packing concentration, Rheological parameters, Solid particles, Bingham fluid |
| 相關次數: | 點閱:84 下載:4 |
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Carbopol 漿體是由Carbopol 940 粉末與水混合而成,具有賓漢流體之特
性。本研究將固體顆粒加入Carbopol 漿體充分混合後,探討固體顆粒粒徑
大小及含量對Carbopol 漿體賓漢屈服應力與賓漢黏滯度的影響。研究試驗
所採用之固體顆粒為粒徑1mm、2mm、5mm 及10mm 之玻璃珠。試驗區分
為均勻固體顆粒及非均勻固體顆粒兩種試驗。均勻固體顆粒試驗,使用前述
四種固體顆粒,按加入固體顆粒含量的多寡,調配五種不同固體體積濃度。
所使用之漿體,按Carbopol 940 粉末與水混合比例之差異,調配成四種具有
不同流變參數之Carbopol 漿體。非均勻固體顆粒試驗是由上述四種不同大
小玻璃珠中選取兩種不同大小玻璃珠調配而成。在固定Carbopol 漿體及固
定非均勻固體顆粒總體積含量條件下,使用五組兩種不同粒徑混合之固體顆
粒,進行五種不同顆粒含量比例下之流變參數量測試驗。
均勻固體顆粒試驗及非均勻固體顆粒試驗結果顯示,在本研究試驗範圍
內,兩者流變特性皆可用賓漢模式描述。均勻固體顆粒試驗的結果顯示賓漢
屈服應力Bp 及賓漢黏滯度Bp 與Carbopol 粉末含量、固體顆粒含量、粒徑大
小有關,其流變參數Bp 與Bp 隨固體顆粒含量愈多而增加,且顆粒含量固定
的條件下,顆粒粒徑愈小,對Bp 與Bp 的影響較顯著;非均勻固體顆粒試驗
的結果顯示賓漢屈服應力Bm 及賓漢黏滯度Bm 與固體顆粒粒徑組成及含量
比例有關。本研究採用固體顆粒在漿體內之極限濃度vm C 之概念分析試驗量
測結果,結果顯示漿體中加入非均勻固體顆粒後賓漢屈服應力之增量P 及
賓漢黏滯度之增量P 與極限濃度vm C 有非常密切之關係; vm C 較大者,其對
應之P 及P 較小。
Carbopol 940 powder is mixed with tape water to form Carbopol slurry that has Bingham-fluid rheological properties. The Carbopol slurry is mixed with glass spheres to form a particle-slurry mixture that still has Bingham-fluid properties. The effects of the size and the content of the glass spheres on the Bingham-fluid parameters such as the Bingham yield stress and the Bingham viscosity are studied in the present study. We use the 4 diameters glass spheres, which were 1mm, 2mm, 5mm, 10mm, respectively. The experiments were mixed uniform and non- uniform particles into the Carbopol slurry. In uniform particles experiments, the four diameters spheres were add into the slurries with different content. The results showed the gravels size and content of Carbopol slurries affects the Bingham-fluid parameters. Bingham yield stress and Bingham viscosity were increased with particle content, and the increments of rheological parameters were significant with small particle diameters. In non- uniform particles experiments, we blend five sets particles with two diameters gravel into the Carbopol slurries, the experimental results show that particle size distribution and content ratio affect the rheological parameters. The increments of Bingham yield stress and Bingham viscosity were decreased while the maximum packing concentrations of Carbopol particle-slurries were increased.
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