Flow around spheres by dissipative particle dynamics

Flow around spheres by dissipative particle dynamics
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通过耗散粒子动力学围绕球体流动

DOI:
10.1063/1.2360421
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发表时间:
2006-10
期刊:
影响因子:
4.6
通讯作者:
--
中科院分区:
工程技术2区
文献类型:
--
作者:

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耗散粒子动力学 (DPD) 方法用于研究经过球体的流动行为。球体由冻结的 DPD 粒子表示,而周围的流体由简单的 DPD 粒子(代表牛顿流体)建模。对于球体表面,采用未经特殊处理的常规模型和Revenga等人提出的带有镜面反射边界条件的模型。 [计算。物理。交流。 121–122, 309 (1999)] 进行了比较。研究了球体在中心保持静止的各种计算域,以测量雷诺数 (Re)=0.5 和 50 时周期性条件和壁的影响。分别考虑均匀流和剪切流两种类型的流动条件,以研究作用在静止球体上的阻力和扭矩。发现基于镜面反射的模型计算出的球体受到的阻力略低于未经特殊处理的常规模型。与传统...
The dissipative particle dynamics (DPD) method is used to study the flow behavior past a sphere. The sphere is represented by frozen DPD particles while the surrounding fluids are modeled by simple DPD particles (representing a Newtonian fluid). For the surface of the sphere, the conventional model without special treatment and the model with specular reflection boundary condition proposed by Revenga et al. [Comput. Phys. Commun. 121–122, 309 (1999)] are compared. Various computational domains, in which the sphere is held stationary at the center, are investigated to gage the effects of periodic conditions and walls for Reynolds number (Re)=0.5 and 50. Two types of flow conditions, uniform flow and shear flow are considered, respectively, to study the drag force and torque acting on the stationary sphere. It is found that the calculated drag force imposed on the sphere based on the model with specular reflection is slightly lower than the conventional model without special treatment. With the conventional...
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