摘要
缺口的功能，主要在於控制與調節平板縱向熱傳與橫向擴散熱傳的大小，即缺口的設計可用來決定平板的擴散熱阻值。當擴散熱阻值越小，代表溫度分佈越均勻，主要應用代表為熱沉；當擴散熱阻值越大，代表溫度分佈越不均勻，此時為絕熱應用。而利用缺口增加平板橫向擴散熱阻，來提升絕熱效果為本論文主要目的。
本研究將利用離散化之能量方程式，針對具矩形/三角形缺口設計的矩形平板進行數值模擬。利用不同缺口長度比、缺口寬度比、熱對流係數以及缺口距離熱源等參數，進行縱向熱傳與橫向熱傳分析。數值分析結果發現，在相同缺口長度比下，矩形缺口其絕熱效果比三角形缺口還好，即矩形缺口比三角形缺口擁有較佳之縱向熱傳能力。此外平板上方的對流熱傳係數大於缺口熱傳係數時，則絕熱效果會顯著的提升。

關鍵字: 擴散熱阻、熱傳、缺口

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