کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7060766 | 1458695 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrothermal assessment of ferrofluids in a metal foam tube under low-frequency magnetic field
ترجمه فارسی عنوان
ارزیابی هیدروترمال فریولفیلد در لوله فوم فلزی تحت میدان مغناطیسی کم
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
In this research, an experimental study is conducted on the hydrothermal characteristics of Fe3O4/water ferrofluid flow through a metal foam tube under constant and alternating low-frequency magnetic field. The Nusselt number and friction factor of Fe3O4/water ferrofluids are measured and presented at different nanoparticle concentrations, Reynolds numbers, magnetic field intensities as well as frequencies. The results have shown that when the magnetic field intensity and frequency increase, there will be an enhancement in the Nusselt number. A maximum of 36.2% improvement in the Nusselt number of ferrofluid is obtained at Reâ¯=â¯200, for 2% nanoparticle weight fraction under alternating magnetic field with 20â¯Hz frequency. Also, the friction factor of Fe3O4/water ferrofluid is observed to be higher than that of DI-water. Moreover, the effect of alternating low-frequency magnetic field is found to be insignificant on the friction factor at the constant magnetic field. The thermal performance index of 1.26 is achieved by applying alternating magnetic field intensity of 400â¯G with 20â¯Hz frequency at Reâ¯=â¯1000 for the ferrofluid with 2% weight fraction. Finally, a polynomial neural network based on the group method of data handling (GMDH) is established to predict the Nusselt number and friction factor in this study. It is obtained that GMDH-type neural network provides a useful model which can precisely estimate those parameters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Thermal Sciences - Volume 127, May 2018, Pages 242-251
Journal: International Journal of Thermal Sciences - Volume 127, May 2018, Pages 242-251
نویسندگان
Mohammad Amani, Mohammad Ameri, Alibakhsh Kasaeian,