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Zareei, Javad, Hoseyni, Seyyed Hissein, Elveny, marischa. (1401). Study of the effect of the boundary layer excitation in the nanofluids flow inside the tube on increasing the heat transfer coefficient. فناوری آموزش, 12(1), 109-119. doi: 10.22061/jcarme.2021.6252.1795
Javad Zareei; Seyyed Hissein Hoseyni; marischa Elveny. "Study of the effect of the boundary layer excitation in the nanofluids flow inside the tube on increasing the heat transfer coefficient". فناوری آموزش, 12, 1, 1401, 109-119. doi: 10.22061/jcarme.2021.6252.1795
Zareei, Javad, Hoseyni, Seyyed Hissein, Elveny, marischa. (1401). 'Study of the effect of the boundary layer excitation in the nanofluids flow inside the tube on increasing the heat transfer coefficient', فناوری آموزش, 12(1), pp. 109-119. doi: 10.22061/jcarme.2021.6252.1795
Zareei, Javad, Hoseyni, Seyyed Hissein, Elveny, marischa. Study of the effect of the boundary layer excitation in the nanofluids flow inside the tube on increasing the heat transfer coefficient. فناوری آموزش, 1401; 12(1): 109-119. doi: 10.22061/jcarme.2021.6252.1795

Study of the effect of the boundary layer excitation in the nanofluids flow inside the tube on increasing the heat transfer coefficient

Journal of Computational & Applied Research in Mechanical Engineering (JCARME)
مقاله 9، دوره 12، شماره 1 - شماره پیاپی 23، آبان 2022، صفحه 109-119    اصل مقاله (686.51 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22061/jcarme.2021.6252.1795
نویسندگان
Javad Zareei* 1؛ Seyyed Hissein Hoseyni2؛ marischa Elveny3
11Department of Biosystem Engineering, Ferdowsi University of Mashhad
2Kashmar University
3Ds & Research Group, Universitas Sumatera Utara, Medan, Indonesia
تاریخ دریافت: 08 آذر 1398،  تاریخ بازنگری: 21 شهریور 1400،  تاریخ پذیرش: 03 مهر 1400 
چکیده
In this paper, the effect of boundary layer excitation on increasing the heat transfer coefficient of water/carbon nanotube (CNT) nanofluid and water/aluminum oxide (Al2O3) nanoparticles has been investigated. The turbulent flow equations inside the pipe with RNG K-ε turbulence model are solved employing fluent software. The results show that the use of water/CNT nanofluid significantly increases the heat transfer coefficient of the convection. There is no such increase for water-aluminum oxide nanoparticles. If the volumetric percentage of the carbon nanotube increases, the rate of increase in the heat transfer coefficient and the flow pressure drop will increase. Therefore, the use of water/CNT nanofluid with lower volumetric percentages is better for improving the convective heat transfer. Also, by placing the barrier on the inner wall of the tube and stimulating the boundary layer, the heat transfer coefficient  thereafter increases in the excitement area. In the present study, the use of three obstacles behind each other has increased the average heat transfer coefficient by 16.7%.
کلیدواژه‌ها
Nanofluid؛ Nanoparticles؛ Carbon nanotube؛ Aluminumoxide nanoparticles؛ Heat transfer coefficient
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