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首页> 外文期刊>Applied Mathematical Modelling >Simulations of liquid-vapor water flows with non-condensable gases on the basis of a two-fluid model
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Simulations of liquid-vapor water flows with non-condensable gases on the basis of a two-fluid model

机译:基于双流体模型,用不可冷凝气体流动的液体蒸汽水的模拟

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摘要

Two phase flows including liquid water, vapor and non-condensable gases are often encountered in industrial applications. In this paper, an extension of the classical Baer-Nunziato two-fluid model is presented in order to account for the non-condensable gases. In this model, the vapor and non-condensable gases form a miscible mixture of gases at temperature equilibrium and kinematic equilibrium. The complete model then allows to account for the full kinematic and thermodynamic disequilibrium between the liquid phase and the gas phase. Moreover, a new form for the mass-transfer source-term has been retained. It leads to a more straightforward numerical integration. When focusing on the numerical scheme, a new algorithm is proposed here for the pressure relaxation effect. At last, some numerical experiments are performed in order to assess the behavior of the model with respect to the relaxation time-scales.
机译:在工业应用中通常遇到包括液态水,蒸汽和不可冷凝气体的两相流量。 在本文中,提出了经典Baer-Nunziato两种流体模型的延伸,以考虑不可冷凝的气体。 在该模型中,蒸汽和不可冷凝的气体在温度平衡和运动平衡下形成气体的混溶混合物。 然后,完整的模型允许考虑液相和气相之间的全运动和热力学不平衡。 此外,已经保留了一种用于传质源期的新形式。 它导致更直接的数值集成。 在重点关注数值方案时,提出了一种用于压力松弛效果的新算法。 最后,执行一些数值实验,以便评估模型的行为相对于弛豫时间尺度。

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