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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/22195完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 楊馥菱(Fu-Ling Yang) | |
| dc.contributor.author | Li-Hsiang Huang | en |
| dc.contributor.author | 黃立翔 | zh_TW |
| dc.date.accessioned | 2021-06-08T04:13:39Z | - |
| dc.date.copyright | 2010-08-19 | |
| dc.date.issued | 2010 | |
| dc.date.submitted | 2010-08-15 | |
| dc.identifier.citation | [1] Mellmann, J. “The transverse motion of solids in rotating cylinders - forms of motion and transition behavior,” Power Technology, vol. 118, pp. 251-270, 2001
[2] Jain, N., Ottino, J. M., and Lueptow, R. M. “An experimental study of the flowing granular layer in a rotating tumbler,” Phys. Fluids, vol. 14, no. 2, pp. 572-582, 2002 [3] Orpe, A. V., and Khakhar, D. V. “Rheology of surface granular slows,” J. Fluid Mech., vol. 571, pp. 1-32, 2008 [4] Jain, N., Ottino, J. M., and Lueptow, R. M. (2004) “Effect of interstitial fluid on a granular flowing layer,” J. Fluid Mech., vol. 508, pp. 23-44, 2004 [5] Mitarai, N. and Nori, F. “Wet granular materials,” Advances in Phys., vol. 55, no. 1-2, pp. 1-45, 2006 [6] Tegzes, P., Vicsek, T., and Schiffer P. “Avalanche Dynamics in wet granular materials,” PhysRevLett.89.094301, 2002 [7] Tegzes, P., Vicsek, T., and Schiffer P. “Development of correlations in the dynamics of wet granular avalanches,” PhysRevLett.67.051303, 2003 [8] Hough, P. V. C. “Methods and means for recognizing complex patterns,” U.S. Patent, 3069654, 1962 [9] Duda, R. O. and Hart, P. E. “Use of the Hough transformation to detect lines and curves in pictures,” Communications of the ACM, vol. 18(9), pp. 509-517, 1975 | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/22195 | - |
| dc.description.abstract | 本文研究顆粒於滾動圓桶中在不同間隙流體及不同轉速下之穩態運動行為。實驗過程使用高速攝影機搭配影像處理以及粒子追蹤測速法(Particle Tracking Velocimetry, PTV)計算出顆粒的瞬時速度，透過空間平均進而求出各種不同的流場性質及重要參數。包括體積分率、混合體平均速度、流動層厚度、應變率、顆粒溫度，觀察分析出間隙流體對於顆粒行為之影響。發現混合體之性質在乾、濕及完全沉浸狀況與在半沉浸及甘油沉浸狀況下有明顯的不同。
此外再由觀測混合體於自由表面的主流速度與滾筒轉速之關係配合Tegez等人在2003年發表的學術文章，將混合體流動行為分類為顆粒流(Granular flow)、暫態流(Transition flow)及黏塑性流(Viscoplastic flow)三種類型。 | zh_TW |
| dc.description.abstract | This article studies the steady state particle motion in a rotating drum with various interstitial liquids and at different drum speeds. An image analysis routine, that integrates Circular Hough Transformation and particle tracking velocimetry, has been developed to monitor the instantaneous individual particle velocity. Through a spatial and temporal average scheme, the bulk quasi-steady behavior was obtained which consider the collective particle motions as a continuum. The flow properties were investigated, including the solid-volume concentration, bulk velocity components, flowing layer thickness, bulk normal and shear strain rates, and granular temperature. Special efforts were made to investigate the influences of interstitial liquid on these granular flow dynamic properties. It is observed that the flow behaviors of the dry, water-wetted, and water-submerged cases are much different to the water-saturated and glycerol-saturated cases.
A comparison between the flow surface velocity and the drum speed was made following the work by Tegez et. al. (2002[6], 2003[7]). Possible flow classifications – a granular, a transitional, or a viscoplastic type – is attempted according to the current experimental findings. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-08T04:13:39Z (GMT). No. of bitstreams: 1 ntu-99-R96522315-1.pdf: 6946435 bytes, checksum: fd63e2e78e63f848faeb8b9e918271b7 (MD5) Previous issue date: 2010 | en |
| dc.description.tableofcontents | Contents
Acknowledgement i 摘要 iii Abstract v Contents vii List of Tables xi List of Figures xiii Nomenclature xvii Chapter 1 Introduction 1 1.1 Motivation 1 1.2 Literature Review 2 1.2.1 Dry Granular Flow 2 1.2.2 Wetted Granular Flow 5 1.2.3 Saturated Granular Flow 7 1.3 Objective 9 Chapter 2 Experimental Setup 11 2.1 Facilities 11 2.1.1 Driving System and Rotating Drum 12 2.1.2 Materials and Mixtures Preparation 14 2.1.3 Image Acquisition Systems 16 Chapter 3 Methodologies for Post-Processing 19 3.1 Hough Transformation 19 3.1.1 Linear Hough Transformation 19 3.1.2 Circular Hough Transformation 21 3.2 Image Analysis Processes 24 3.2.1 Particle Identification and Location 25 3.2.2 Particle Tracking Velocimetry 26 3.2.3 Error Estimation 28 3.3 Flow-Based Coordinate System 31 3.3.1 Flow Characteristics 31 3.3.2 Determination of the Dynamic Repose Angle 33 3.4 Average Scheme 37 3.5 Experimental Procedures 40 Chapter 4 Repose Angle, Solid-Volume Concentration, and Velocity 43 4.1 Repose Angle 43 4.2 Solid-Volume Concentration 47 4.3 Bulk Velocity 51 4.3.1 Velocity Contour Distributions 51 4.3.2 Wall Velocity and Slip 56 4.3.3 Flowing Layer Thickness 59 4.3.4 Streamwise Bulk Velocity-Depth Profile 63 4.3.5 Surface Velocity and Flow Categorization 65 Chapter 5 Bulk Strain Rate 71 5.1 Strain Rate 71 5.1.1 Normal Strain Rate and Divergence Field 73 5.1.2 Shear Strain Rate 79 5.2 ∂U/∂Y–Depth Profiles 85 5.3 Granular Temperature 88 Chapter 6 Conclusions 93 References 99 Appendix Circular Hough Transformation Code 101 | |
| dc.language.iso | en | |
| dc.subject | 黏塑性流 | zh_TW |
| dc.subject | 滾動圓筒 | zh_TW |
| dc.subject | 間隙流體 | zh_TW |
| dc.subject | 粒子追蹤測速法 | zh_TW |
| dc.subject | 顆粒流 | zh_TW |
| dc.subject | 暫態流 | zh_TW |
| dc.subject | granular flow | en |
| dc.subject | viscoplastic flow | en |
| dc.subject | rotating drum | en |
| dc.subject | interstitial liquid | en |
| dc.subject | particle tracking velocimetry | en |
| dc.title | 流體對滾動圓桶中二相顆粒流之影響 | zh_TW |
| dc.title | Dynamics of Two-Phase Granular Mixture in a Rotating Drum with a Focus on Liquid Effects | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 98-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 李石頓,卡艾瑋,周憲德,劉正良 | |
| dc.subject.keyword | 滾動圓筒,間隙流體,粒子追蹤測速法,顆粒流,暫態流,黏塑性流, | zh_TW |
| dc.subject.keyword | rotating drum,interstitial liquid,particle tracking velocimetry,granular flow,viscoplastic flow, | en |
| dc.relation.page | 118 | |
| dc.rights.note | 未授權 | |
| dc.date.accepted | 2010-08-16 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
| 顯示於系所單位： | 機械工程學系 | |
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|---|---|---|---|
| ntu-99-1.pdf 未授權公開取用 | 6.78 MB | Adobe PDF |
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