This study focused on assessing the effect of mesoscale solid stress in the coarse grid two‐fluid model (TFM) simulation of gas–solid fluidized beds of Geldart Group A particles over a broad range of flow regimes, including bubbling, turbulent, fast, and pneumatic transport fluidization regimes. Particularly, the impact of mesoscale solid pressure, mesoscale solid viscosity, and mesoscale solid stress anisotropy were investigated by comparing six different coarse‐grid TFM settings. Compared with the available experimental data, it is found that both the kinetic theory‐based TFM with only drag correction and the filtered TFM can predict the flow behavior in all fluidization regimes. Mesoscale solid pressure and viscosity have the opposite impact on flow hydrodynamics; they compete and offset each other, which confirms the assumption employed in many previous studies that the mesoscale solid stress could be neglected in coarse‐grid TFM simulation. Published 2018. This article is a U.S. Government work and is in the public domain in the USA. AIChE J, 64: 3565–3581, 2018

中文翻译：

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在所有流态化条件下对Geldart A颗粒进行粗网格TFM模拟时评估中尺度固体应力

这项研究的重点是评估Geldart A组颗粒的气固流化床粗网格双流体模型（TFM）模拟中尺度固体应力的影响，该模拟在广泛的流动状态下进行，包括鼓泡，湍流，快速和流动。气动运输流态化方案。特别是，通过比较六种不同的粗网格TFM设置，研究了中尺度固体压力，中尺度固体粘度和中尺度固体应力各向异性的影响。与可用的实验数据相比，发现仅基于阻力理论的基于动力学理论的TFM和经过过滤的TFM都可以预测所有流化状态下的流动行为。中尺度固体压力和粘度对流动流体动力学有相反的影响。他们互相竞争，互相抵消，这证实了以前的许多研究中所采用的假设，即在粗网格TFM模拟中可以忽略中尺度固体应力。发行于2018年。本文是美国政府的工作，在美国属于公共领域。AIChE J，64：3565–3581，2018