English  |  正體中文  |  简体中文  |  Items with full text/Total items : 78852/78852 (100%)
Visitors : 35463491      Online Users : 279
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/2290

    Title: 剪力槽中粒子混合機制研究;Granular mixing in the shear cell
    Authors: 陳俊中;Chun-Chung Chen
    Contributors: 機械工程研究所
    Keywords: 粒子流;混合;granular;mixing
    Date: 2003-06-17
    Issue Date: 2009-09-21 11:42:56 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 在剪力槽粒子混合實驗中,本實驗利用影像分析方法量測兩種不同顏色粒子之混合層隨時間的變化,並且計算出粒子擴散係數、粒子溫度以及剪率種種數據相互比較。其中,粒子溫度搭配擴散方程式可計算出混合層中的濃度變化,進而推測理論上混合層隨時間變化之關係,並且與實驗做比較。在本文中,有效擴散係數Deff是一個重要的參數,代表流場混合快慢的指標,而這個參數也與底盤轉速、平均粒子溫度與剪率做比較,觀察其趨勢的變化。本實驗發現底盤轉速,也就是剪力槽系統所供應的能量對粒子的混合有很大的影響,另外,在混合初始時,混合層隨時間變化較明顯。而在參數的比較方面,發現當轉速增加時,有效擴散係數與平均粒子溫度以及剪率都呈現正相關。 The experiments of particle mixing were performed in a shear cell device with five different bottom wall velocities. The glass spheres with a mean diameter of 2 mm were used as granular materials. The mixing processes of the granular materials were recorded by a high-speed camera. The image processing technology and particle tracking method were employed to analysis the granular mixing and the diffusion of particles. In this paper, the effective diffusion coefficient is an important parameter. The effective diffusion coefficients were increase with the increase of the bottom wall velocities, average granular temperatures, and shear rates near the top wall. The FDM was also used to calculate the concentration profiles that were compared to the experiment data.
    Appears in Collections:[機械工程研究所] 博碩士論文

    Files in This Item:

    File SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 隱私權政策聲明