液體與懸浮液體的黏彈性質在工業應用與科學研究中相當重要。現階段工業產業的流變儀中，線上即時量測寬頻技術仍具挑戰。這些裝置最終可能可以在一次掃描中獲取剪切稀化或剪切增稠的液體資訊。本篇論文中，我們發展鐘擺式黏彈流體頻譜儀(LPVS)，以此儀器量測一個頻率範圍內約0.3至100赫茲的液體的黏彈性質，例如儲存剪力模數、消散剪力模數等。LPVS的組成是由一個震盪子浸泡在液體中，藉由電磁交互作用，震盪子會受到一股控制力的作用產生彎曲或扭轉，震盪子的變形量則由雷射位移量測系統紀錄下來。本研究中實驗了幾種液體與懸浮液，例如水、矽油、聚乙烯醇溶液，懸浮液包含氧化鋯科力懸浮液與牛奶。最小量測的液體黏度為1 cP，最小量測之儲存剪力模數與消散剪力模數分別為0.0001與0.01帕。除實驗量測以外，也以有限元素模擬分析流固耦合，將模擬數據與實驗進行定性比較。

Viscoelastic properties of liquids and suspension fluids are of importance in industrial applications and scientific research. The current status of experimental rheometry, on-line devices to measure liquid’s viscoelastic properties in a wide frequency rage in real time still post several challengings in industry. Such devices ultimately may provide shear-thinning or shear-thickening information of liquids in one frequency scan. In this thesis, we develop the Liquid Pendulum-type Viscoelastic Spectroscopy (LPVS) to measure liquid’s viscoelastic properties, such as storage shear modulus G' and loss shear modulus G', in a moderate frequency range, from about 0.3 to 100 Hz. LPVS is composed of a vibrating core immersed in the surrounding liquid. By using the electromagnetic interaction, the core is deformed under pure bending or torsion by load control, and its deformation is recorded by a laser-based displacement measurement system. Several liquids and suspension fluids are studied in this research, such as water, silicone oil, polyvinyl alcohol, suspension with zirconia particles and milk. The smallest measured viscosity is 1 cP. The smallest measured G' and G' are 0.0001 and 0.01 Pa, respectively. In addition to experimental works, finite element calculations with the consideration of fluid-structure interactions were performed to qualitatively correlate simulation data with experimental data.

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