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Linear stability of convection in a vertical channel filled with nanofluid saturated porous medium

机译:用纳米流体饱和多孔介质的垂直通道中对流的线性稳定性

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摘要

The convection in a vertical channel filled with a porous medium saturated by a nanofluid is studied numerically. The effects of Brownian motion and thermophoresis are incorporated in the model used for nanofluid. Also, the flow within the porous region is governed by Brinkman's equation. The generalized eigenvalue problem for the perturbed state is obtained from a normal mode analysis and solved using the Chebyshev spectral collocation method. The Rayleigh number is expressed as an implicit function of the wavenumber with other parameters. The critical wavenumber and the critical Rayleigh number are calculated for different parameters. The preferred modes under critical conditions are detected.
机译:在数值上研究填充有由纳米流体饱和的多孔介质的垂直通道中的对流。 褐色运动和耐热化的影响纳入用于纳米流体的模型中。 此外,多孔区域内的流动由Brinkman的等式控制。 从正常模式分析获得扰动状态的广义特征值问题,并使用Chebyshev光谱搭配方法解决。 瑞利数表示为Wavenumber与其他参数的隐式功能。 针对不同参数计算临界波数和临界瑞利数。 检测临界条件下的优选模式。

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