篇名 | 奈米粒子尺寸對懸滴表面張力之影響 |
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卷期 | 7:4 |
並列篇名 | Nanoparticle Size on Pendant Drop Surface Tension |
作者 | 張君輿 、 翁輝竹 、 陳介力 |
頁次 | 183-186 |
關鍵字 | 奈米流體 、 奈米粒子 、 表面張力 、 懸滴法 、 nanofulids 、 nanoparticles 、 surface tension 、 pendant drop method |
出刊日期 | 201210 |
本論文完成粒子尺寸對奈米流體懸滴表面張力之影響。主要目的在完成奈米流體懸滴界面性質之分析。首先,我們完成了水基奈米流體之配製。接著,利用正割法完成非線性方程式求解以預測懸滴輪廓。最後,透過數值預測與實驗觀察之比較,我們完成奈米流體懸滴表面張力之分析。實驗結果發現,當粒子尺寸較小時,表面張力隨粒子體積分率變化關係較為平緩。隨著粒子磁作用力增加,此平緩效應可進一步被放大。
This paper presents a study on the effects of particle size for pendant drop surface tension of nanofluids. The main purpose is to conduct an analysis of nanofluid on this interfacial property. First, water-based nanofluids are prepared. Then, the secant method is used to solve the nonlinear differential equation so as to predict the pendant drop profile. Finally, by comparing with numerical predictions and experimental observations, the analysis on surface tension of nanofluids is completed. The experiment results reveal that a nanofluid with smaller particle size can benefit a smoother variation of the surface tension with the particle volume fraction and this effect can be further magnified by increasing the magnetic interaction.