Acta Physica Sinica, Volume. 69, Issue 16, 164401-1(2020)
Figures & Tables(17)
Fig. 2. Streamlines, isotherms contours for different
: (a)
= 0.3; (b)
= 0.5; (c)
= 0.7; (d)
= 0.9.
Fig. 3. (a) Vertical velocity distribution at 
.
Fig. 4. (a) At the heated wall 
.
Fig. 5. Streamlines, isotherms contours for different
Fig. 6. (a) Vertical velocity distribution at 
.
Fig. 7. (a) At the heated wall
Fig. 8. Streamlines, isotherms contours for different
Fig. 9. (a) Local temperature distribution along the
Fig. 10. (a) Local velocity in the y direction; (b) local
Fig. 11. (a) Variation of 
in different 
.
Fig. 12. (a) Variation of
Table 1.
Thermophysical properties of water, Al2O3 and glass fibers.
H2O, Al2O3和玻璃纤维的热物理性质
View tableView in ArticleTable 1.
Thermophysical properties of water, Al2O3 and glass fibers.
H2O, Al2O3和玻璃纤维的热物理性质
物性参数 H2O Al2O3 Glass fiber[ 23 ,24 ]ρ/kg·m–3 997.1 397 1650 Cp/J·kg–1·K–1 4179 765 750 k/W·m–1·K–1 0.613 25 1.2 β/K–1 21 × 10–5 1.89 × 10–5 — ds/nm — 47 —
Table 2.
Calculation formula for thermodynamic properties of nanofluids.
纳米流体的热物性参数计算公式
View tableView in ArticleTable 2.
Calculation formula for thermodynamic properties of nanofluids.
纳米流体的热物性参数计算公式
热物性参数 计算表达式 纳米流体粘度 $\mu {}_{nf} = \dfrac{{{\mu _f}}}{{{{\left( {1 - \phi } \right)}^{2.5}}}}$ 纳米流体密度 ${\rho _{nf}} = \left( {1 - \phi } \right){\rho _f} + \phi {\rho _s}$ 纳米流体热容 ${\left( {\rho {C_p}} \right)_{nf}} = \left( {1 - \phi } \right){\left( {\rho {C_p}} \right)_f} + \phi {\left( {\rho {C_p}} \right)_s}$ 纳米流体热扩散系数 ${\alpha _{nf}} = \dfrac{{{k_{nf}}}}{{{{\left( {\rho {C_p}} \right)}_{nf}}}}$ 纳米流体热膨胀系数 ${\left( {\rho \beta } \right)_{nf}} = \left( {1 - \phi } \right){\left( {\rho \beta } \right)_f} + \phi {\left( {\rho \beta } \right)_s}$ 纳米流体导热系数 ${k_{nf}} = \dfrac{{{k_p} + 2{k_f} - 2\left( {{k_f} - {k_p}} \right)\phi }}{{{k_p} + 2{k_f} + 2\left( {{k_f} - {k_p}} \right)\phi }}{k_f}$ 多孔介质有效 导热系数 ${k_m} = \left( {1 - \epsilon} \right){k_p} + {\epsilon k_{nf}}$
Table 3. Comparison of Nuave number with literature[33] in different grids number.
View tableView in ArticleTable 3. Comparison of Nuave number with literature[33] in different grids number.
不同网格数下的Nuave数 80 × 80 100 × 100 120 × 120 140 × 140 Nuave数 8.528 8.670 8.744 8.785 误差/% 3.39% 1.70% 0.83% 0.36%
Table 4. Comparison of Nuave number with previous literature[33].
View tableView in ArticleTable 4. Comparison of Nuave number with previous literature[33].
Ra数 文献[ 27 ]本文结果 误差/% 103 1.116 1.123 0.63 104 2.238 2.266 1.25 105 4.509 4.556 1.04 106 8.817 8.744 0.83
Table 5. Comparison of Nuave number with previous literature[34].
View tableView in ArticleTable 5. Comparison of Nuave number with previous literature[34].
NO. Da数 Ra数 文献[ 34 ]本文结果 误差/% 1 10–2 104 1.530 1.497 2.16 2 10–2 105 3.555 3.441 3.09 3 10–2 5 × 105 5.740 5.694 0.87
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Bei-Hao Zhang, Lin Zheng.
Paper Information
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Received: Feb. 28, 2020
Accepted: --
Published Online: Jan. 4, 2021
The Author Email:
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