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The modified characteristics finite element method for time-dependent Darcy-Brinkman problem

机译:时变Darcy-Brinkman问题的改进特征有限元方法

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Purpose This study aims to capture the effective behavior of double-diffusion problem, which arises from the combined heat and mass transfer in porous medium and develop the modified characteristics finite element method.Design/methodology/approach The proposed finite element method deals with the nonlinear term temporal term by modified characteristics method. Then, the authors compute the velocity, pressure, temperature and concentration using the decoupled technique. Finally, to show the efficiency of the method, the authors give some numerical examples.Findings From the numerical results, one can see that the method has a good accuracy, which shows that the method can simulate this Darcy-Brinkman problem well.Originality/value The originality lies in the fact that the proposed scheme is the first time for solving the Darcy-Brinkman problem, which is a more complicated model, and includes the velocity, pressure, temperature and concentration.
机译:目的本研究旨在捕捉由于多孔介质中传热和传质相结合而产生的双重扩散问题的有效行为,并开发出改进的特征有限元方法。设计/方法/方法拟议的有限元方法涉及非线性术语通过改进的特征方法获得时间术语。然后,作者使用解耦技术计算速度,压力,温度和浓度。最后,为了说明该方法的有效性,作者给出了一些数值示例。从数值结果中可以看出,该方法具有良好的准确性,这表明该方法可以很好地模拟此Darcy-Brinkman问题。价值独创性在于所提出的方案是第一次解决Darcy-Brinkman问题,这是一个更为复杂的模型,包括速度,压力,温度和浓度。

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