臺灣博碩士論文加值系統

由於高科技發展迅速，電子元件的體積越來越小越精密，電子產品推陳出新，電腦中央處理器效能也越來越好，也就代表著晶片運作時散發的熱量也越來越高，CPU散熱的方式有很多種，本研究利用3 種不同外型的電腦機殼，利用場協同理論分析電腦主機內風扇位置對主機CPU 散熱的冷卻評估並用COMSOL軟體分析場協同角的特性。本研究發現，場協同角越低表示速度場與溫度梯度場越平行對電腦主機CPU產生的散熱能力越高，也就是說場協同理論可以用來評估電腦主機CPU散熱風扇的最佳化並提供散熱風扇設計位置的参考指標。

關鍵詞： Comsol Multiphysics、場協同角、場協同理論

Because of the rapid development of high technology, electronic components get smaller and smaller and so sophisticated, computer CPU is getting better to endure high heat transfer while working. Therefore, CPU cooling efficiency is more important.In this study, there are 3 kinds of computer shell to investigate cooling fan position and used Comsol Multiphysics Software to simulate the optimal field synergy angle by field synergy principle.

In this study, we found the low field synergy angle cause paralellel between velocity field and temperature gradient field for computer CPU heat dissipation，the principle of field synergy can be applied to evaluate optimization position of the computer CPU cooling fan and to provide optimal fan design of location for compurer company.

Keywords： Comsol Multiphysics, Field Synergy Angle, Field Synergy Principle

摘要..................................................................................................................................I
Abstract .........................................................................................................................II
誌謝................................................................................................................................III
目錄................................................................................................................................IV
圖目錄...........................................................................................................................VII
表目錄...........................................................................................................................XX
第一章 前言....................................................................................................................1
第二章 研究目的............................................................................................................2
第三章 文獻回顧............................................................................................................4
第四章 基本理論............................................................................................................6
4.1 熱傳理論基礎...........................................................................................................6
4.2 COMSOL 數值方法.................................................................................................6
4.3 統御方程式...............................................................................................................7
4.4 傳熱強化的場協同(field synergy principle)原理.................................................9
4.5 場協同理論(field synergy principle) ..................................................................12
4.6 收斂準則.................................................................................................................13
4.7 COMSOL Multiphysics 原理................................................................................13
4.8 數值運算流程圖.....................................................................................................14
第五章 模擬與分析.......................................................................................................15
5.1 模擬分析(simulation)-1........................................................................................18
5.1.1 進風、出風口不同位置的場協同角..................................................................18
5.1.2 進風、出風不同位置的速度場..........................................................................19
5.1.3 進風、出風不同位置的溫度場..........................................................................19
5.2 模擬分(simulation)-2............................................................................................33
5.2.1 進風、出風口位置不同的場協同角..................................................................33
5.2.2 進風、出風不同位置的速度場..........................................................................34
5.2.3 進風、出風不同位置的溫度場..........................................................................34
5.3 模擬分析(simulation)-3........................................................................................48
5.3.1 進風、出風口位置不同的場協同角...................................................................48
5.3.2 進風、出風不同位置的速度場...........................................................................49
5.3.3 進風、出風不同位置的溫度場...........................................................................49
5.4 模擬分析(simulation)-4.........................................................................................63
5.4.1 進風、出風口不同位置的場協同角...................................................................63
5.4.2 進風、出風不同位置的速度場...........................................................................64
5.4.3 進風、出風不同位置的溫度場...........................................................................64
5.5 模擬分析(simulation)-5.........................................................................................78
5.5.1 進風、出風口位置不同的場協同角...................................................................78
5.5.2 進風、出風不同位置的速度場...........................................................................79
5.5.3 進風、出風不同位置的溫度場...........................................................................79
5.6 模擬分析(simulation)-6.........................................................................................93
5.6.1 進風、出風口位置不同的場協同角....................................................................93
5.6.2 進風、出風不同位置的速度場...........................................................................94
5.6.3 進風、出風不同位置的溫度場...........................................................................94
5.7 模擬分析(simulation)-7.......................................................................................108
5.7.1 進風、出風口不同位置的場協同角.................................................................108
5.7.2 進風、出風不同位置的速度場.........................................................................109
5.7.3 進風、出風不同位置的溫度場.........................................................................109
5.8 模擬分析(simulation)-8.......................................................................................123
5.8.1 進風、出風口位置不同的場協同角.................................................................123
5.8.2 進風、出風不同位置的速度場.........................................................................124
5.8.3 進風、出風不同位置的溫度場.........................................................................124
5.9 模擬分析(simulation)-9.......................................................................................138
5.9.1 進風、出風口位置不同的場協同角.................................................................138
5.9.2 進風、出風不同位置的速度場.........................................................................139
5.9.3 進風、出風不同位置的溫度場.........................................................................139
第六章 結果與討論......................................................................................................153
參考文獻.......................................................................................................................155

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