MHD convective heat transfer in a discretely heated square cavity with conductive inner block using two-phase nanofluid model
| Parent link: | Scientific Reports Vol. 8.— 2018.— [7410, 23 p.] |
|---|---|
| Institution som forfatter: | |
| Andre forfattere: | , , , |
| Summary: | Title screen The problem of steady, laminar natural convection in a discretely heated and cooled square cavity filled by an alumina/water nanofluid with a centered heat-conducting solid block under the effects of inclined uniform magnetic field, Brownian diffusion and thermophoresis is studied numerically by using the finite difference method. Isothermal heaters and coolers are placed along the vertical walls and the bottom horizontal wall, while the upper horizontal wall is kept adiabatic. Water-based nanofluids with alumina nanoparticles are chosen for investigation. The governing parameters of this study are the Rayleigh number (103 ≤ Ra ≤ 106), the Hartmann number (0 ≤ Ha ≤ 50), thermal conductivity ratio (0.28 ≤ k w ≤ 16), centered solid block size (0.1 ≤ D ≤ 0.7) and the nanoparticles volume fraction (0 ≤ ϕ ≤ 0.04). The developed computational code is validated comprehensively using the grid independency test and numerical and experimental data of other authors. The obtained results reveal that the effects of the thermal conductivity ratio, centered solid block size and the nanoparticles volume fraction are non-linear for the heat transfer rate. Therefore, it is possible to find optimal parameters for the heat transfer enhancement in dependence on the considered system. Moreover, high values of the Rayleigh number and nanoparticles volume fraction characterize homogeneous distributions of nanoparticles inside the cavity. High concentration of nanoparticles can be found near the centered solid block where thermal plumes from the local heaters interact. |
| Sprog: | engelsk |
| Udgivet: |
2018
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| Fag: | |
| Online adgang: | http://dx.doi.org/10.1038/s41598-018-25749-2 |
| Format: | Electronisk Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=658916 |
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| 181 | 0 | |a i | |
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| 200 | 1 | |a MHD convective heat transfer in a discretely heated square cavity with conductive inner block using two-phase nanofluid model |f A. I. Alsabery [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 49 tit.] | ||
| 330 | |a The problem of steady, laminar natural convection in a discretely heated and cooled square cavity filled by an alumina/water nanofluid with a centered heat-conducting solid block under the effects of inclined uniform magnetic field, Brownian diffusion and thermophoresis is studied numerically by using the finite difference method. Isothermal heaters and coolers are placed along the vertical walls and the bottom horizontal wall, while the upper horizontal wall is kept adiabatic. Water-based nanofluids with alumina nanoparticles are chosen for investigation. The governing parameters of this study are the Rayleigh number (103 ≤ Ra ≤ 106), the Hartmann number (0 ≤ Ha ≤ 50), thermal conductivity ratio (0.28 ≤ k w ≤ 16), centered solid block size (0.1 ≤ D ≤ 0.7) and the nanoparticles volume fraction (0 ≤ ϕ ≤ 0.04). The developed computational code is validated comprehensively using the grid independency test and numerical and experimental data of other authors. The obtained results reveal that the effects of the thermal conductivity ratio, centered solid block size and the nanoparticles volume fraction are non-linear for the heat transfer rate. Therefore, it is possible to find optimal parameters for the heat transfer enhancement in dependence on the considered system. Moreover, high values of the Rayleigh number and nanoparticles volume fraction characterize homogeneous distributions of nanoparticles inside the cavity. High concentration of nanoparticles can be found near the centered solid block where thermal plumes from the local heaters interact. | ||
| 461 | 1 | |t Scientific Reports | |
| 463 | 1 | |t Vol. 8 |v [7410, 23 p.] |d 2018 | |
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a конвекция | |
| 610 | 1 | |a теплообмен | |
| 610 | 1 | |a наножидкости | |
| 701 | 1 | |a Alsabery |b A. I. | |
| 701 | 1 | |a Sheremet |b M. A. |c physicist |c Professor of Tomsk Polytechnic University, Doctor of Physical and Mathematical Sciences |f 1983- |g Mikhail Aleksandrovich |3 (RuTPU)RU\TPU\pers\35115 |9 18390 | |
| 701 | 1 | |a Chamkha |b A. J. | |
| 701 | 1 | |a Hashim |b I. | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Инженерная школа энергетики |b Научно-образовательный центр И. Н. Бутакова (НОЦ И. Н. Бутакова) |3 (RuTPU)RU\TPU\col\23504 |
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| 856 | 4 | |u http://dx.doi.org/10.1038/s41598-018-25749-2 | |
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