A numerical simulation of heat transfer in an enclosure with a nonlinear heat source
A numerical simulation of heat transfer in an enclosure with a nonlinear heat source
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DOI：
10.1080/10407782.2017.1330093
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发表时间：
2017-06
期刊：
影响因子：
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通讯作者：
I. Amber;T. O'Donovan
中科院分区：
文献类型：
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作者：
I. Amber;T. O'Donovan
摘要：提出了在倾斜角为 0 ≤ Φ ≤ 60 的熔融二元盐填充外壳中吸收不均匀集中太阳辐射驱动的自然对流的二维模拟。外壳从顶部边界进行体积加热，并在下边界容纳一个有限厚度的黑色刚性导热板，这有助于在下边界产生自然对流混合。使用有限元方法求解了解释与深度相关的辐射吸收的控制方程。数值结果表明，增加倾角会减少自然对流，而较高的瑞利会促进自然对流。
ABSTRACT Two-dimensional simulations of natural convection driven by the absorption of nonuniform concentrated solar radiation in a molten binary salt-filled enclosure inclined at 0 ≤ ϕ ≤ 60 are presented. The enclosure is volumetrically heated from the top boundary and accommodates a black rigid, heat-conducting plate of finite thickness at the lower boundary, which aids in the generation of natural convective mixing at the lower boundary. The governing equations that account for the depth-dependent absorption of radiation are solved using the finite-element method. Numerical results reveal that increasing the inclination angles decreases the natural convection and higher Rayleigh promotes natural convection.