Numerical Simulation of Dense Gas-Solid Fluidized Beds: A Multiscale Modeling Strategy
Numerical Simulation of Dense Gas-Solid Fluidized Beds: A Multiscale Modeling Strategy
复制标题
DOI：
10.1146/annurev.fluid.40.111406.102130
复制
发表时间：
2008-01
影响因子：
27.7
通讯作者：
van der M.A. Hoef;V. S. Annaland;Ng Niels Deen;J. Kuipers
中科院分区：
文献类型：
--
作者：
van der M.A. Hoef;V. S. Annaland;Ng Niels Deen;J. Kuipers
气固流化床广泛应用于许多涉及物理和/或化学转化的化学过程中，因此它们是化学工程科学中的热门研究课题。多年来，研究人员已经开发了大量的数值模型的气体流化床，描述气固流动在不同层次的细节。在这篇评论中，我们歧视这些模型的基础上，无论是拉格朗日或欧拉方法用于气体和/或颗粒流，随后将它们分为五个主要类别，其中三个，我们更详细地讨论。具体而言，这些是解析离散颗粒模型（也称为直接数值模拟），未解析离散颗粒模型（也称为离散元模型）和双流体模型。对于每一个层次的描述，我们给出了一般的运动方程，并指出它们如何可以通过有限差分技术数值求解，其次是一些说明性的例子，流化床模拟。最后，我们解决了未来在气体流化床的多尺度模拟中面临的一些挑战
Gas-solid fluidized beds are widely applied in many chemical processes involving physical and/or chemical transformations, and for this reason they are the subject of intense research in chemical engineering science. Over the years, researchers have developed a large number of numerical models of gas-fluidized beds that describe gas-solid flow at different levels of detail. In this review, we discriminate these models on the basis of whether a Lagrangian or a Eulerian approach is used for the gas and/or particulate flow and subsequently classify them into five main categories, three of which we discuss in more detail. Specifically, these are resolved discrete particle models (also called direct numerical simulations), unresolved discrete particle models (also called discrete element models), and two-fluid models. For each of the levels of description, we give the general equations of motion and indicate how they can be solved numerically by finite-difference techniques, followed by some illustrative examples of a fluidized bed simulation. Finally, we address some of the challenges ahead in the multiscale modeling of gas-fluidized beds