溫度感測循跡微粒應用於溫度場與速度場可視化時，較高的螢光強度能增加訊號雜訊比以提升量測準確性，而量子點作為新興的溫度感測螢光材料，相較於傳統有機的溫度感測材料具有較高的螢光強度，因此本研究探討溫度感測螢光材料與循跡微粒製成溫度感測循跡微粒應用於微尺度熱流場時適用之溫度感測材料選擇，以及溫度反算之不同資料後處理方式以及其效果。以揮發塗覆方式合成兩種雙波長溫度感測微粒配對，分別是EuTTA / Rhodamine 110，以及量子點CsPbBr3 / CdZnSeS/ZnS。研究中以影像分析比較了塗覆於聚醯胺微粒表面之塗覆成功率以及放光特性。塗覆的結果顯示，微粒上同時有EuTTA及Rhodamine 110波長訊號占比93%；量子點微粒上同時有CsPbBr3及CdZnSeS/ZnS波長訊號占比91%，此外配合光譜儀的結果得知兩種溫度感測微粒仍具溫度敏感性，判斷兩者皆成功。在放光特性上量子點的合成微粒具有較高的放光強度，可以提升訊號雜訊比降低量測誤差，因此將其運用於微尺度溫度場可視化實驗。研究中進一步利用數值模擬輔助設計出測試用流道，並根據加熱條件找出用於現場溫度校正的均勻溫度分布，以及用於溫度場可視化的溫度梯度場，將溫度梯度的模擬結果與溫度場可視化之結果比較。測試用流道尺寸為14×4×0.2??3，溫度梯度的模擬結果顯示在流道中的溫度變化約為2.43℃/mm。溫度場可視化實驗三種不同的微粒濃度，並測試不同之溫度影像資料後處理模式。第一種模式將前處理後的微粒影像分成窗格，並將窗格內的平均光強度或光強度比值用於計算溫度校正及溫度場可視化；第二種模式針對前處理後的光強度比微粒影像，透過影像處理抓出影像中的微粒後，於溫度校正計算及溫度場可視化。溫度場可視化結果顯示，第一種以窗格平均的影像資料處理模式，使用高微粒濃度，以10×10平均窗格，配合三次多項式擬合的溫度校正曲線，以單一量子點CsPbBr3訊號可得到最準確之溫度校正結果；第二種針對微粒的影像處理方式，因合成微粒之間量子點濃度塗覆不均，計算出的溫度梯度結果誤差較大。最後採用循跡方式觀察單獨合成微粒在溫度梯度場中光強度的變化，發現其變化趨勢明顯且與模擬結果高度相關，證明針對個別微粒循跡處理在溫度後處理較為適宜。

The application of temperature sensitive tracer particles in temperature and velocity field visualization. The higher fluorescent intensity can increase signal to noise ratio and then enhance measurement accuracy. Quantum dot is a novel temperature sensitive fluorescent material which has stronger light intensity compare to traditional organic one. Thus, in this study, temperature sensitive particles made by luminescent temperature sensitive material and tracer particles was applied to visualize microscopic thermal and fluid flows and different post-processing methods to evaluate temperature were compared. EuTTA / Rhodamine 110 dye and CsPbBr3 / CdZnSeS/ZnS quantum dots were coated onto polyamide seeding particles by evaporative coating method to form dual wavelength temperature-sensitive tracer particles. Image analysis results of the coated particles show that the emission signals of both EuTTA and Rhodamine 110 can be detected on 93% of the coated particles simultaneously. For the quantum dots pair, CsPbBr3 and CdZnSeS/ZnS, 91% of the synthesized dye particle can be detected to have both emission signals simultaneously. In addition, spectrometer test shows that whether both dyes or both quantum dots have fluorescent and temperature sensitivity after synthesis process. Further comparisons on emission intensity show that the combination of CsPbBr3 and CdZnSeS/ZnS gives better signal to noise ratio and reduces measurement error, and therefore adopted for the post-processing of temperature visualization tests. CFD Simulation was performed to help designing a microscopic flow channel for temperature calibration and visualization experiments. The dimension of test flow channel is 14×4×0.2??3, which provides uniform temperature distribution and a temperature gradient of 2.43℃/mm. Three levels of particle seeding density were tested with several different post-processing schemes. The first shcme devides particle images into several windows and the light intensity or intensity ratio in each window will be averaged for obtaining temperature calibration curve and final temperature measurements. For the second scheme, intensity or intensity ratio on individual particle image is measured by preprocesing particle image and then every intensity ratio on particle will be counted to calculate temperature calibration curve and visualization. The visualization results show that for the first post-processing scheme, CsPbBr3 signal with high density seeding particle, 10×10 window size and cubic polynomial fitted temperature calibration curve provide the most accurate temperature calibration results. For the second scheme, the results show high deviation and are not consistent to simulation, which can be due to the inhomogeneous coating of quantum dots onto individual particles. Finally, a single particle tracking scheme shows highly correlated results between the intensity variation and temperature change and aggree reasonably to the simulation results. This result shows that tracking-based post-processing scheme for individual temperature-sensitive particles is more appropriate for obtaining temperature data.

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