本文以數值模擬及實驗量測研究超材料熱集中器，以集中熱能至特定區域。我們運用不同的材料參數，及邊界條件，繼而模擬熱集中器在定常態與暫態下溫度場之變化，並實際設計、製作熱集中器，透過紅外線熱影像儀拍攝其溫度場的實驗結果，來與模擬結果進行比較。模擬方面，藉由改變超材料的排列結構及幾何大小，來探討理想情況下，熱集中器對各物理量的影響；實作方面，我們參考模擬設定，並修正實驗誤差。由實驗結果及數值模擬的比較可知，溫度較高的一端，差異較大；溫度較低的一端，差異卻較小。我們懷疑是因為裝置表面與上方空氣還是有些許自然對流。因此，我們透過額外的實驗來證實我們的假說，而也確實使實驗與模擬結果有更加吻合的趨勢。本研究透過模擬與實驗的結果來設計最佳的熱集中器，在選擇熱集中器材料性質及設定冷熱源溫度時，能夠由此研究得到一個參考依據。

We design a thermal concentrator which is analyzed by both numerical simulation and experimental measurement. The goal is to concentrate heat energy to a specific area. We use different materials and boundary conditions to simulate the change of temperature field under steady and transient state. In addition, a thermal concentrator is also designed and fabricated. The temperature field is captured by an infrared thermal camera, and then compared with simulation results. In simulation, by changing the arrangement structure and geometric size of metamaterial, the effect of thermal concentrator on each physical quantity is discussed. In experiment, we take into account the simulation results and modify the experimental settings. The comparison of experimental result and numerical simulation shows that there is a large difference in the high temperature side and a small difference in the low temperature side. We suspect that there is some natural convection between the hot surface and the air above the device. To resolve our hypothesis, additional experiment is needed. The experimental results did improve when natural convection is considered. In this study, the optimal thermal concentrator was designed through both simulation and experimental processes. This research can provide useful understanding when it comes to select material properties of using metamaterial for thermal concentrator.

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