以作者查詢圖書館館藏

、以作者查詢臺灣博碩士

、以作者查詢全國書目

、勘誤回報

、線上人數：20

、訪客IP：3.22.240.205

姓名	胡育明(Yu-ming Hu)  查詢紙本館藏	畢業系所	機械工程學系
論文名稱	剪力顆粒流中密度分離效應對顆粒環沉降的影響 (The effect of density segregation on the sinking of particle ring in a shear granular flow)
相關論文	★ 筆記型電腦改良型自然對流散熱設計 ★ 移動式顆粒床過濾器濾餅流場與過濾性能之研究 ★ IP67防水平板電腦設計研究 ★ 汽車多媒體導航裝置散熱最佳化研究 ★ 流動式顆粒床過濾器三維流場觀察及能性能測試 ★ 流動式顆粒床過濾器冷性能測試 ★ 流動式顆粒床過濾器過濾機制研究 ★ 二維流動式顆粒床過濾器內部配置設計研究 ★ 循環式顆粒床過濾器過濾性能研究 ★ 流動式顆粒床過濾器之流場型態設計與研究 ★ 流動式顆粒床過濾器之流動校正單元設計與分析研究 ★ 流動式顆粒床過濾器之雙葉片型流動校正單元設計與冷性能過濾機制研究 ★ 稻稈固態衍生燃料成型性分析之研究 ★ 流動式顆粒床過濾器之不對稱葉片設計與冷性能過濾機制研究 ★ 流動式顆粒床過濾器之滾筒式粉塵分離系統與冷性能過濾及破碎效應研究 ★ 稻稈固態衍生燃料加入添加物成型性分析之研究
檔案	[Endnote RIS 格式]    [Bibtex 格式]    [相關文章]   [文章引用]   [完整記錄]   [館藏目錄]   [檢視]  [下載] 本電子論文使用權限為同意立即開放。 已達開放權限電子全文僅授權使用者為學術研究之目的，進行個人非營利性質之檢索、閱讀、列印。 請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。
摘要(中)	本文主要是探討不同密度之顆粒體於類二維剪力槽系統中，因密度分離效應所造成之顆粒環的沉降行為。並以實驗的方式，分析剪力槽內底盤速度之快慢、粒子體積佔有比之大小以及浮力效應對顆粒環沉降行為的影響。其中浮力效應意指不同密度之顆粒體因重力效應的影響，而形成密度大之顆粒向下擠壓，密度小之顆粒向上堆積的顆粒分層現象。另外，為了更清楚地分析及比較不同條件下顆粒環沉降的狀況，故本文特別定義了無因次沉降深度及沉降速率兩個參數，分別針對顆粒環位置的變化及速率進行討論。 本研究的實驗結果顯示，無因次沉降深度與沉降速率兩者，皆會隨著粒子體積佔有比與底盤轉速的增加而提升，且兩者之間為正比的關係。另一方面，於相同實驗配置下，無因次沉降深度的值會隨著密度比的增加而上升。而於不同的實驗配置下，顆粒環的沉降行為則是會受到追蹤粒子整體重量的大小以及顆粒之間力鏈(Force Chain)結構的影響。此外，當密度比較大時，沉降速率也會隨之增加，這是由於不同密度之顆粒所受重力效應的差異較大的原故。最後本實驗也發現，當密度比小於1.57時，顆粒環會因為密度分離效應的不足而產生崩散，使得系統內之輕重顆粒產生均勻混合的狀態。
摘要(英)	This study investigates the sinking behavior of particle ring due to the density segregation effect in a quasi-2D Couette shear cell device. The influences of bottom wall velocity, solid fraction of granular material and buoyancy effect are studied experimentally. Here the “Buoyancy effect” means the heavier particles sink to lower levels in the flowing layer while lighter ones rise due to the effects of gravity. Additionally, the parameters of the dimensionless sinking depth and sinking rate are defined to describe the change of particle ring’s position and quantify the sinking speed of the particles respectively. The experimental results show that both the dimensionless sinking depth and the sinking rate increase with increasing the bottom wall velocity and solid fraction, and the linear relation is also observed between the dimensionless sinking depth and the sinking rate. On the other hand, in the case of the same experimental configuration, the dimensionless sinking depth will increase as the density ratio increases. However, the sinking behavior of particle ring will be affected by the overall weight of tracking particles and the force chains inter particles in different experimental configuration. The result also show that the sinking rate increase with increasing the density ratio due to the gravity effect. Finally, we found that the particle ring structure cannot be maintained due to the weak density segregation effect when density ratio is less than 1.57, and the binary mixture becomes the homogeneous mixing state in the granular system.
關鍵字(中)	★ 剪力槽 ★ 浮力效應 ★ 沉降速率 ★ 無因次沉降深度 ★ 粒子流 ★ 分離現象	關鍵字(英)	★ Granular flow ★ Segregation ★ Shear cell ★ Sinking rate ★ Dimensionless sinking depth
論文目次	摘要i Abstractii 目錄iii 附表目錄v 附圖目錄vi 符號說明ix 第一章 緒論1 1.1 粒子流簡介1 1.1.1 顆粒物質1 1.1.2 粒子流的特性2 1.2 粒子流中的力鏈結構4 1.3 顆粒物質分離現象之探討6 1.4 剪力粒子流中的分離現象9 1.4.1 剪力粒子流的研究發展9 1.4.2 剪力槽中顆粒的分離現象10 1.5 研究動機與架構11 第二章 實驗方法13 2.1 實驗設備13 2.2 實驗方法與原理17 2.2.1 實驗參數原理17 2.2.2 影像處理分析方法18 2.3 剪力槽中密度分離效應所形成之顆粒環的沉降實驗19 2.3.1 實驗配置19 2.3.2 實驗流程及步驟20 2.4 誤差分析22 第三章 結果與討論24 3.1 無因次沉降深度與沉降速率之分析與計算24 3.1.1 顆粒環之位置變化圖24 3.1.2 無因次沉降深度隨時間變化之關係圖25 3.1.3 沉降速率26 3.2 底盤轉速之差異對顆粒環沉降行為的影響27 3.2.1 底盤轉速與無因次最終沉降深度之關係27 3.2.2 底盤轉速與沉降速率之關係28 3.3 粒子體積佔有比對密度分離機制產生顆粒環沉降行為之探討 28 3.3.1 不同粒子體積佔有比對無因次最終沉降深度的影響29 3.3.2 不同粒子體積佔有比對沉降速率的影響29 3.4 不同密度比下顆粒環沉降行為的比較30 3.4.1 浮力效應與無因次沉降深度的關係30 3.4.2 密度比大小對無因次沉降深度的影響31 3.4.3 密度比大小對沉降速率的影響34 3.5 顆粒環的沉降行為與粒子流場之間的關係34 3.6 沉降速率與無因次最終沉降深度之間的關係36 第四章 結論37
參考文獻	Aidanpää, J. O., Shen, H. H., and Gupta, R. B., “Experimental and Numerical Studies of Shear Layers in Granular Shear Cell,” Journal of Engineering Mechanics, Vol. 122, No.3, pp. 187-196, 1996 Bagnold, R. A., “The Physics of Blown Sand and Desert Dunes,” Methuen, London, 1941 Bagnold, R. A., “The shearing and dilation of dry sand and the 'singing' mechanism,” Proceedings of the Royal Society, A295, pp. 219-232, 1966 Campbell, C. S., “Rapid granular flows,” Annual Review of Fluid Mechanics, Vol. 22, pp. 57-92, 1990 Dantu, P., “A contribution to the mechanical and geometrical study of non-cohesive,” Proceeding if the 4th International Conference on Soil Mechanics and Foundation Engineering (London: Butterworth), Vol. 133, pp. 144-148, 1957 Duran, J., “Sands, Powders, and Grains：An Introduction to the Physics of Granular Materials,” Springer Verlag, 2000 Elliott, K.E., Ahmadi, G., and Kvasnak, W., “Couette flows of a granular monolayer an experimental study,” Journal of Non-Newtonian Fluid Mechanics, Vol. 74, pp. 89-111, 1998 Faraday M., “On a peculiar class of acoustical figures; and on certain forms assumed by a group of particles upon vibrating elastic surfaces,” Philosophical Transactions of the Royal Society (London), Vol. 121, pp. 299-318, 1831 Fenistein, D., and van Hecke, M., “Kinematics - Wide shear zones in granular bulk flow,” Nature, Vol. 425, pp. 256, 2003 Gerald, H., “Pattern Formation in Granular Materials,” Springer Verlag, 1999 Goldhirsch, I., “Rapid granular flows,” Annual Review of Fluid Mechanics, Vol. 35, pp. 267-293, 2003 Golick, L. A., and Daniels, K. E., “Mixing and segregation rates in sheared granular materials,” Physical Review E, Vol. 80, 042301, 2009 Hirshfeld, D., and Rapaport, D. C., “Molecular Dynamics Studies of Grain Segregation in Sheared Flow,” Physical Review E, Vol. 56, pp. 2012-2018, 1997 Hogg, R., “Mixing and Segregation in Powders: Evaluation, Mechanisms and Processes,” KONA Powder and Particle Journal, No.27, 2009 Hsiau, S. S., and Jang H. W., “Measurements of velocity fluctuations of granular materials in a shear cell,” Experimental Thermal and Fluid Science, Vol. 17, pp. 202-209, 1998 Hsiau, S. S., and Shieh Y. M., “Effect of soild fraction and self-diffusion of sheared granular flows,” Chemical Engineering Science, Vol. 55, pp. 1969-1979, 2000 Hsiau, S. S., and Yang W. L., “Stresses and transport phenomena in sheared granular flows with different wall conditions,” Physics of Fluids, Vol. 14, pp. 612-621, 2002 Hsiau, S. S., and Yang W. L., “Transport property measurements in sheared granular flows,” Chemical Engineering Science, Vol. 60, pp. 187-199, 2005 Hvorslev, M. J., “A Ring Shearing Apparatus for the Determination of the Shearing Resistance and Plastic Flow of Soil,” Proceedings, International Conference on Soil Mechanics and Foundation Engineering, Cambridge, Mass, Vol. 2, pp. 125-129, 1936 Hvorslev, M. J., “Torsion Shear Test and Their Place in the Determination of Shearing Resistance of Soils,” Proceedings of the American Society of Testing and Materials, Vol. 39, pp. 999-1022, 1939 Jaeger, H. M., and Nagel, S. R., “Physics of the Granular State,” Vol. 255, pp. 1523-1531, 1992 Jaeger, H. M., Nagel, S. R., and Behringer, R. P., “Granular solids, liquids and gases,” Reviews of Modern Physics, Vol. 68, pp. 1259-1273, 1996 Jain, N., Ottino, J. M., and Lueptow, R. M., “Effect of interstitial fluid on a granular flowing layer,” Journal of Fluid Mechanics, Vol. 508, pp. 23-44, 2004 Jain, N., Ottino, J. M., and Lueptow, R. M., “Regimes of segregation and mixing in combined size and density granular systems: an experimental study,” Granular Matter, Vol. 7, pp.69-81, 2005 Jha, A. K., and Puri, V. M., “Percolation segregation of multi-size and multi-component particulate materials,” Powder Technology, Vol. 197, pp. 274-282, 2010 Klein, M., Tsai, L. L., Rosen, M. S., Pavlin, T., Candela, D., and Walworth, R. L., “Interstitial gas and density segregation of vertically vibrated granular media,” Physical Review E, Vol. 74, 010301, 2006 Kudrolli, A., “Size separation in vibrated Granul,” Reports on Progress Physics, Vol.67, pp. 209-247, 2004 Li, H. M., and McCarthy, J. J., “Cohesive particle mixing and segregation under shear,” Powder Technology, Vol. 164, pp. 58-64, 2006 Liao, C. C., Hsiau, S. S., Tsai, T. H., and Tai, C. H., “Segregation to mixing in wet granular matter under vibration,” Chemical Engineering Science, Vol. 65, pp. 1109-1119, 2010 Liao, C. C., Hsiau, S. S., and Kiwing, To., “Granular dynamics of a slurry in a rotating drum,” Physical Review E, Vol. 82, 010302, 2010 Lovoll, G., Maloy, K. J., and Flekkoy, E. G., “Force measurements on static granular materials,” Physical Review E, Vol. 60 pp. 5872-5878, 1999 May, L. B. H., Golick, L. A., Phillips, K. C., Shearter, M., and Daniels, K. E., “Shear-driven size segregation of granular materials: Modeling and experiment,” Physical Review E, Vol. 81, 051301, 2010 Möbius, M. E., Lauderdale, B. E., Nagel, S. R., and Jaeger, H. M., “Brazil-nut effect Size separation of granular particles,” Nature, Vol. 414 pp.270, 2001 Mueth, D. M., Jaeger, H. M., and Nagel, S. R., “Force distribution in a granular medium,” Physical Review E, Vol. 57 pp. 3164-3169, 1998 Ogawa, S., “Multi-temperature Theory of Granular Materials,” In Proceedings of US-Japan Seminar on Continuum-Mechanical and Statistical Approaches in the Mechanics of Granular Materials, Tokyo, 1978 Ottino, J. M., and Khakhar, D. V., “Mixing and segregation of granular materials,” Annual Review of Fluid Mechanics, Vol. 32, pp. 55-91, 2000 Reynolds, O., “On the Dilatancy of Media Composed of Rigid Particles in Contact,” Philosophical Magazine, Vol. 20, pp. 469-481, 1885 Richard, P., “Slow relaxation and compaction of granular systems,” Nature Materials 4, pp. 121–128, 2005 Rosato, A., Strandburg, K. J., Prinz, F., and Swendsen, R. H., “Why the Brazil nuts are on top: size segregation of particulate matter by shaking,” Physical Review Letters, Vol. 58, pp. 1038-1040, 1987 Sanfratello, L., and Fukushima, E., “Experimental studies of density segregation in the 3D rotating cylinder and the absence of banding,” Granular Matter, Vol.11 pp. 73-78, 2009 Shamlon, P. A., “Handling of Bulk Solids,” Butterworth, London, 1988 Shi, Q. F., Sun, G., Hou, M., and Lu, K. Q., “Density-driven segregation in vertically binary granular mixture,” Physical Review E, Vol. 75, 061302, 2007 Silbert, L. E., Grest, G. S., and Landry, J. W., “Statistics of the contact network frictional and frictionless granular packings,” Physical Review E, Vol. 66, 061303, 2002 Taguchi, Y., “New origin of a convective motion: Elastically induced convection in granular materials,” Physical Review Letters, Vol. 69, pp. 1367-1370, 1992 Utter, B., and Behringer, R. P., “Transients in sheared granular matter,” European Physical Journal E, Vol.14 pp.373-380, 2004 Voivret, C., Radjai, F., Delenne, J. Y., and Youssoufi, M. S. EI, “Multiscale Force Network in Highly Polydisperse Granular Media,” Physical Review Letters, Vol.102, 178001, 2009 Wang, D. M., and Zhou, Y. H., “Particle dynamics in dense shear granular flow,” Acta Mechanica Sinica, Vol. 26, pp 91-100, 2010 Yang, W. L., and Hsiau, S.S., “The effect of liquid viscosity on sheared granular flows,” Chemical Engineering Science, Vol. 61, pp. 6085-6095, 2006 Yu, Y. S., Hu, L., Gone, C., and Zhang, G. H., “Effect of boundary condition on the movement of spheres on a granular medium,” Journal of Shandong University(Natural Science), Vol. 45, No. 9, 2010
指導教授	蕭述三(Shu-san Hsiau)	審核日期	2011-7-19
推文	facebook   plurk   twitter   funp   google   live   udn   HD   myshare   reddit   netvibes   friend   youpush   delicious   baidu
網路書籤	Google bookmarks   del.icio.us   hemidemi   myshare