اثر دما و درصد وزنی نانوذرات اکسید آلومینیوم بر خواص ترموفیزیکی نانوسیال

نوع مقاله : پژوهشی

نویسندگان

1 دانشجوی دکتری مهندسی شیمی، واحد آیت الله آملی، دانشگاه آزاد اسلامی، آمل

2 دانشیار مهندسی شیمی، واحد آیت الله آملی، دانشگاه آزاد اسلامی، آمل

3 استادیار مهندسی شیمی، واحد آیت الله آملی، دانشگاه آزاد اسلامی، آمل

4 دانشیار فیزیک، دانشکده علوم پایه، دانشگاه لرستان، خرم آباد

چکیده

در این پژوهش اثر دما و درصد وزنی نانوذرات اکسیدآلومینیوم بر خواص ترموفیزیکی نانوسیال مورد مطالعه قرار گرفت. نانوذرات اکسید آلومینیوم سنتز شد و از روش­های استفاده از سورفکتانت، ارتعاش اولتراسونیک و تغییر اسیدیته برای پراکندگی نانوذرات در سیال پایه استفاده گردید. اثر 0/5-0/1 درصدهای وزنی نانوذرات در دماهای 25، 45 و 65 درجه سلسیوس بر خواص ترموفیزیکی نانوسیال بررسی شد. حداکثر پایداری نانوسیال بر پایه آب و اتیلن گلیکول با به­ترتیب 25 و 75 درصد حجمی در نسبت­ وزنی یک به یک سدیم دودسیل سولفات به نانوذرات به­دست آمد. با افزایش دما و درصد وزنی نانوذرات، رسانایی حرارتی به‌طور غیرخطی افزایش یافت. دانسیته و ویسکوزیته با افزایش درصد وزنی و کاهش دما، افزایش یافت. نتایج نشان داد حداکثر افزایش هدایت حرارتی 76/2 درصد در دمای 25 درجه سلسیوس و 0/5 درصد وزنی نانوذره بدست آمد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of Temperature and Weight Percentage of Aluminum Oxide Nanoparticles on Thermophysical Properties of Nanofluid

نویسندگان [English]

  • saeed Rahman Salari 1
  • خاورپور Khavarpour 2
  • mojtaba masoumi 3
  • Saba Mosivand 4
1 PhD student of Chemical Engineering, Ayatollah Amoli Branch, Islamic Azad University, Amol
2 Associate Professor of Chemical Engineering, Ayatollah Amoli Branch, Islamic Azad University, Amol
3 Assistant Professor of Chemical Engineering, Ayatollah Amoli Branch, Islamic Azad University, Amol
4 Associate Professor of Physics, Physics Department, Faculty of Basic Sciences, Lorestan University, Khorram-Abad
چکیده [English]

In this research, the effect of temperature and weight percentage of aluminum oxide nanoparticles on the thermophysical properties of nanofluid was studied. Aluminum oxide nanoparticles were synthesized and the methods of using surfactant, ultrasonic vibration and changing acidity were used to disperse the nanoparticles in base fluid. The effect of 0.1-0.5 weight percent of nanoparticles at temperatures of 25, 45 and 65 °C on the thermophysical properties of nanofluid was investigated. Maximum stability of nanofluid based on water and ethylene glycol with 25 and 75% by volume, respectively was achieved in a one-to-one weight ratio of sodium dodecyl sulfate to nanoparticles. With increasing temperature and weight percentage of nanoparticles, the thermal conductivity increased nonlinearly. Density and viscosity increased with increasing weight percentage and decreasing temperature. The results showed that the maximum increase in thermal conductivity was 76.2% at a temperature of 25 °C and 0.5% by weight of nanoparticles.

کلیدواژه‌ها [English]

  • Nanofluid
  • Aluminum Oxide
  • Viscosity
  • Weight Percentage
  • Thermal Conductivity

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