کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
656396 | 1458042 | 2016 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Heat transfer and friction factor of multi-walled carbon nanotubes-Fe3O4 nanocomposite nanofluids flow in a tube with/without longitudinal strip inserts
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The heat transfer and friction factor characteristics of multi-walled carbon nanotubes-Fe3O4 (MWCNT-Fe3O4) nanocomposite nanofluids flow in a tube with longitudinal strip inserts were studied experimentally. The MWCNT-Fe3O4 nanocomposite was synthesized by in-situ growth and chemical co-precipitation method and characterized by various techniques; after that stable nanofluids were prepared by dispersing MWCNT-Fe3O4 in distilled water. The heat transfer and friction factor experiments were conducted for nanofluids in the Reynolds number from 3000 to 22,000, volume concentrations from 0% to 0.3%, and longitudinal strip inserts of aspect ratios 1, 2, 4 and 12. The maximum Nusselt number and friction factor enhancements were observed for 0.3% nanofluid flow in a tube with longitudinal strip insert of aspect ratio 1. From the results, the Nusselt number enhancement for 0.3% nanofluid flow in a tube without inserts is 32.72% and with inserts of aspect ratio 1 is 50.99% at a Reynolds number of 22,000. Similarly, friction factor enhancement for 0.3% nanofluid flow in a tube without inserts is 1.15-times and with inserts of aspect ratio 1 is 1.26-times for a Reynolds numbers of 22,000 compared to base fluid. A new Nusselt number and friction factor regression equations were proposed based on the experimental data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 100, September 2016, Pages 691-703
Journal: International Journal of Heat and Mass Transfer - Volume 100, September 2016, Pages 691-703
نویسندگان
L. Syam Sundar, G. Otero-Irurueta, Manoj K. Singh, Antonio C.M. Sousa,