臺灣博碩士論文加值系統

本論文主要是採用Nedderman與Tűzűn的運動模型,以及應用在具有不同出口之二維平底儲槽粒子媒介的邊界條件，構成一個邊界值的問題。在經過儲槽釋放後，兩種粒子材質的停滯區域高度，實驗的方式測量。我們假設其運動常數與停滯區域的高度呈現某種比例，採用實驗結果以及newton-Raphson(牛頓-拉弗森)方法，獲得在不同出口的情況下之運動參數。計算速度的水平與垂直分量之分佈。此處所獲得的研究成果，將提供給研究人員有關儲槽中粒子流動另外的理論知識，並且擴充運動模型在粒子流動上的應用。

Employing the Nedderman and kinematic model [8] and the boundary conditions for granular media in a two-dimensional flat-bottomed hopper, boundary-value problems were constructed. The heights of the stagnant zone were experimentally measured after centric and eccentric hopper discharge.We postulated that the kinematic constant would be proportional to the height of the stagnant zone. For eccentric discharge, employing experimental results and the Newton-Raphson method, kinematic constants were obtained. The profiles of the horizontal and vertical velocity components for centric and eccentric hopper discharge were then calculated, respectively.The research work reported here provides additional theoretical knowledge about granular flows in the hopper to workers in this field and also enhances the kinematic model application to granular flows.

目錄
摘要………………………………………………………………1
英文摘要…………………………………………………………3
誌謝………………………………………………………………4
目錄………………………………………………………………5
表目錄…………………………………………………………..8
圖目錄……………………………………………………………10
第一章 緒論……………………………………………………….11
1.1文獻回顧……………………………………………………….11
1.2研究動機……………………………………………………….15
1.3 全文概述……………………………………………………..17
第二章 運動模式………………………………………………….18
2.1.開口置左流場之運動模式………………………………18
2.2.開口置中流場之運動模式………………………………24
2.3 開口置右流場之運動模式………………………………26
第三章 運動常數………………………………………………….31
3.1 開口置左流場之運動常數………………………………31
3.2 開口置中流場之運動常數………………………………33
3.3 開口置右流場之運動常數………………………………33
第四章 結果與討論-開口置左……………………………………37
4.1 開口置左停滯區…………………………………………37
4.2 開口置左速度分佈(PE)…………………………………38
4.3 開口置左速度分佈(PS)…………………………………39
第五章 結果與討論-開口置右……………………………………42
5.1 開口置右停滯區…………………………………………42
5.2 開口置右速度分佈(PE)…………………………………43
5.3 開口置右速度分佈(PS)…………………………………44
第六章 結果與討論-開口置中…………………………………..46
6.1 開口置中停滯區…………………………………………46
6.2 開口置中速度分佈(PE)…………………………………46
6.3 開口置中速度分佈(PS)…………………………………48
第七章 未來方向………………………………………………….50
參考文獻…………………………………………………………..53

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