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Numerical simulation for natural convection in vertical channels

机译:垂直通道自然对流的数值模拟

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The investigation of laminar natural convection in vertical obstructed channels is conducted using an h-adaptive finite element algorithm. The adaptive model uses an L_2 norm based a-posteriori error estimator with a semi-implicit, time-stepping projection technique. The advection terms are treated using an explicit Adams Bashforth method while the diffusion terms are advanced by an implicit Euler scheme. By using the adaptive algorithm, mesh independent studies can be avoided. Results are obtained for thermal and flow patterns including average Nusselt numbers for different parameters (Rayleigh number, aspect ratio and locations of obstructions) in both smooth and obstructed channels.
机译:垂直阻塞通道中层流自然对流的研究是使用h自适应有限元算法进行的。自适应模型使用基于L_2范数的后验误差估计器和半隐式时间步投影技术。对流项使用显式的Adams Bashforth方法处理,而扩散项通过隐式Euler方案进行处理。通过使用自适应算法,可以避免网格无关的研究。获得了热和流动模式的结果,包括在平滑通道和阻塞通道中不同参数(瑞利数,纵横比和阻塞位置)的平均努塞尔数。

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