نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشیار، گروه تبدیل انرژی، دانشکده عمران، آب و انرژی، دانشگاه جامع امام حسین (علیه السلام)، تهران، ایران ایمیل: m.hemmatesfe@semnan.ac.ir
2 دانشجوی کارشناسی ارشد، گروه تبدیل انرژی، دانشکده عمران، آب و انرژی، دانشگاه جامع امام حسین (علیه السلام)، تهران، ایران
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [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]
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