Penggunaan Hukum Hagen-Poiseuille dalam Penentuan Koefisien Viskositas Zat Cair dengan Prinsip Kontrol Berat Berbantuan Software Logger Pro

Lia Adini, Okimustava Okimustava

Abstract


Pengukuran koefisien viskositas zat cair menggunakan hukum Hagen-Poiseuille dengan metode Microcomputer Based Laboratory telah dilakukan. Viskositas merupakan ukuran penolakan fluida terhadap perubahan bentuk di bawah tekanan shear. Hukum Hagen-Poiseuille digunakan dalam penelitian ini karena zat cair yang digunakan merupakan zat cair Newtonian. Tangki viskometer kapiler yang dikaitkan ke sensor gaya diisi zat cair untuk kemudian dialirkan keluar melalui pipa kapiler dengan panjang (9,8±0,09)×10-2 m dan diameter dalam (2,1620±0,0096) ×10-3 m. Data penurunan massa zat cair direkam menggunakan sensor gaya buatan Vernier Tecnology dan analisis fitting data menggunakan software Logger Pro. Nilai karakteristik waktu diperoleh dari hasil fitting data digunakan untuk perhitungan koefisien viskositas zat cair menggunakan hukum Hagen-Poiseuille. Dari percobaan ini diperoleh nilai koefisien viskositas air sebesar (1,063±0,113) mPa.s yang sesuai dengan nilai acuan teori yaitu 1,002 mPa.s, oli SAE 10W-30 sebesar (79,01±8,90) Pa.s sesuai dengan nilai acuan teori 76,8 Pa.s, dan gliserin sebesar (593,4±56,7) mPa.s sesuai dengan nilai acuan teori 612 mPa.s.


Measurement of liquid viscosity coefficient using Hagen-Poiseuille law with Microcomputer-Based Laboratory method has been done. Viscosity is the fluid declination measure of form changes under sheer pressure. Hagen-Poiseuille law is used in this study because the liquid used is a Newtonian liquid. Capillary viscometer tanks attached to force sensors are filled with liquid to be streamed out through capillary tubes of length (9.8 ± 0.09) × 10-2 m and the inner diameter (2.1620 ± 0.0096) × 10-3 m. Data on the mass degradation of liquids was recorded using a Vernier Technology force sensor while the data fitting analysis using Logger Pro software. The time characteristic values which obtained from the data fittings are used in the calculation of the liquid viscosity coefficient using Hagen-Poiseuille law. From this experiment, the obtained water viscosity coefficient value is (1.063 ± 0.113) mPa.s corresponds to the reference value of the theory is 1.002 mPa.s, the SAE oil 10W-30 is (79.01 ± 8.90) Pa.s corresponds to the reference value of the theory 76.8 Pa.s, and glycerin is (593.4 ± 56.7) mPa.s corresponds to the reference value of the theory 612 mPa.s.


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DOI: http://dx.doi.org/10.12928/jrkpf.v4i2.8165

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