空腔中的自然对流在流体力学和传热工程中经常使用,如热交换器,电子,太阳能集热器,生长晶体。然而,对带有分体式挡板的空腔中的自然对流流动和传热的物理学了解最少。这项研究的基本目的是研究位于不同位置的加热分裂挡板对正弦波纹星腔内稳态自由对流的影响。在此模型配置中,外部波浪形外壳保持在恒定温度Tc,而内部分体式挡板在恒定温度Th下加热。有限元方法用于离散化和求解描述外壳内流体流动和传热的控制方程。这种数值方法旨在分析挡板倾角的影响,挡板间距,瑞利数对流体动力学和对流热输运特征的影响。通过流线和等温线轮廓说明了速度和温度分布的变化。此外,数值结果显示在传热的Nuavg项中,分析挡板的内部空间和挡板的角度(θ=00,450,900)。关键发现表明,增加瑞利数和不同的位置(向上,中央,向下)的内部垂直分裂挡板将速度的大小提高了88.1%,分别为85.9和89.6%。此外,对于0°的内部矩形分割挡板角度,45°,90°,在104到106的瑞利数范围内,Nuavg表现出显著的变化,最大增幅为71.9%,46.7%,随后下降45.9%。
The natural convection in cavities is frequently used in fluid mechanics and heat transfer engineering, such as heat exchangers, electronics, solar collectors, and growing crystals. However, the physics of natural convection flow and heat transfer in cavities with split baffles is least understood. The fundamental aim of this research is to investigate the impact of heated split baffles positioned at various locations on steady-state free convection within a sinusoidal corrugated star cavity. In this model configuration, the outer wavy enclosure is maintained at a constant temperature of T c , while the inner split baffles are heated at a constant temperature of T h . The finite element method is employed to discretize and solve the governing equations describing the fluid flow and heat transfer within the enclosure. This numerical approach aimed to analyze the effects of baffle inclination angles, baffle spacing, Rayleigh number on the fluid dynamics and convective thermal transport characteristics. The variation in velocity and temperature profile is illustrated through the streamlines and isotherm contours. Moreover, the numerical result is displayed in term N u a v g of the heat transfer, which are analyzed for inside space of baffles and angles of the baffle ( θ = 0 0 , 45 0 , 90 0 ) . The key finding demonstrates that increasing the Rayleigh numbers and the different positions (up, central, down) of inner vertical split baffles enhances the magnitude of the velocity by 88.1 % , 85.9 and 89.6 % respectively. Furthermore, for the inner rectangular split baffle angles of 0 ° , 45 ° , and 90 ° , and within the Rayleigh number range of 10 4 to 10 6 , the N u a v g exhibits significant variations, with maximum increases of 71.9 % , 46.7 % and a subsequent decrease of 45.9 % .