مکانیک سیالات و آیرودینامیک

مکانیک سیالات و آیرودینامیک

بررسی تجربی و ارائه مدل برتر در پیش‌بینی ویسکوزیته دینامیکی نانوسیال هیبریدی کربن چند جداره - اکسید روی با استفاده از روش سطح پاسخ (RSM)

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشجوی کارشناسی ارشد، دانشگاه جامع امام حسین (علیه السلام)، تهران، ایران
2 دانشیار، دانشگاه جامع امام حسین (علیه السلام)، تهران، ایران
چکیده
در این مطالعه به بررسی ویسکوزیته دینامیکی نانوسیال هیبریدی، شامل نانوذره‌های ZnO- MWCNT با نسبت ترکیب (%۲۰-%۸۰) بر سیال پایه روغن‌40w10 در محدوده دمایی oC ۵ تا oC ۵۵ و شش کسر حجمی در محدوده ۰۵/‌۰ تا ۱ درصد و نرخ برشی از s-1 ۵/۶۶۶ تا s-1 ۱۱۹۹۷ پرداخته شد. با کمک روش تحلیلی سطح پاسخ (RSM) مدل‌های مختلف بررسی شدند. در این مقایسه، تجزیه‌وتحلیل عامل‌های مهم آماری مدل‌های مختلف شامل R²، Adjusted R²، Predicted R²، CV%، Std. Dev صورت گرفت. نتایج نشان داد که مدل مرتبه چهارم، بهترین عملکرد را بین مدل‌ ها ی مختلف دارد و مقدار عامل‌ ها ی مهم آن به ترتیب ۹۹۹۳/۰، ۹۹۹۴/۰، ۹۹۹۱/۰، ۴۶/۲ و ۵۷/۴ است. همچنین روند تغییرات ویسکوزیته بررسی شد. نتایج نشان داد که دما بیشترین تأثیر را بر ویسکوزیته دارد. همچنین جهت کاهش هزینه‌ ها و صرفه‌جویی در وقت، رابطه بهینه جهت پیش‌بینی ویسکوزیته دینامیکی نانوسیال مورد‌نظر، تولید و ارائه شد.
کلیدواژه‌ها

عنوان مقاله English

Experimental investigation and presentation of superior models in forecasting of dynamic viscosity of MWCNT-ZnO nanofluid using response surface method (RSM

نویسندگان English

Majid Jalilian 1
Mohammad Hemmat Esfe 2
1 Master's degree, Imam Hossein University, Tehran, Iran
2 Associate Professor, Imam Hossein University, Tehran, Iran
چکیده English

In this study, the dynamic viscosity of the hybrid nanofluid, including ZnO-MWCNT nanoparticles with a ratio of (20%-80%) on the 40w10 oil base fluid in the range of 5 oC to 55 oC and six volume fractions in the range of 0.05 to 1% and a shear of to 11997s-1 is investigated. With the help of response surface analysis method (RSM), different models are investigated. In this comparison, analysis of important parameters of different models including R², Adjusted R, Predicted R², CV%, Std. Dev are studied. The results showed that the fourth order model has the best performance among different models and its important values are R2=0.9993, Adjusted R²=0.9994, Predicted R²=0.9991, Cv%=2.46 and Std. Dev. =4.57 respectively. Also, the trend of viscosity changes is investigated. The results showed that temperature has the greatest effect on viscosity. Also, in order to reduce costs and save time, the optimal relationship for predicting the dynamic viscosity is presented.

کلیدواژه‌ها English

Hybrid nanofluid
Experimental investigation Multiwall carbon zinc oxide
Response surface method
Dynamic viscosity

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دوره 14، شماره 1 - شماره پیاپی 35
بهار و تابستان
شهریور 1404
صفحه 143-158

  • تاریخ دریافت 16 خرداد 1404
  • تاریخ بازنگری 08 مرداد 1404
  • تاریخ پذیرش 20 مرداد 1404
  • تاریخ انتشار 01 شهریور 1404