Direct numerical simulations of isolated rigid particles; Validation of smooth profile method
Direct numerical simulations of isolated rigid particles; Validation of smooth profile method
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DOI：
10.1016/j.powtec.2023.118280
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发表时间：
2023-01
影响因子：
5.2
通讯作者：
M. Uzair;M. D. Qasim;M. A. Bhatti;A. Zaidi;John J. Molina;R. Yamamoto;Adnan Hamid
中科院分区：
文献类型：
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作者：
M. Uzair;M. D. Qasim;M. A. Bhatti;A. Zaidi;John J. Molina;R. Yamamoto;Adnan Hamid
摘要通过对孤立的规则颗粒（长扁形、圆盘形、纤维形和不规则扁形）和不规则形状颗粒在牛顿流体中沉降的直接数值模拟，验证了最近更新的光滑剖面法（SPM）对刚性颗粒的有效性。这些非球形颗粒是通过连接球形珠粒产生的，这为任何刚性颗粒使用SPM提供了额外的好处。计算了规则形状颗粒的阻力系数和升力系数，作为取向角（θ）、纵横比（ω）和雷诺数（Re）的函数。阻力系数作为Re和θ的函数，与文献值吻合良好，所有形状的标准化阻力系数都遵循著名的sin2 θ曲线。归一化升力系数也与文献值吻合得很好。根据我们计算阻力系数和升力系数的数据回归，还提出了纤维、圆盘和不规则长轴的新关联式，其中包括Re、θ和ω的参数效应。
Abstract Recently updated Smooth Profile Method (SPM) is validated for rigid particles by performing Direct Numerical Simulations for isolated regular (prolate, disk, fiber and scalene prolate) and irregular-shaped particles, settling in a Newtonian fluid. These non-spherical particles are generated by joining the spherical beads, which gives the added benefit to use SPM for any arbitrary rigid particle. Drag and lift coefficients are calculated for regular-shaped particles, as a function of orientation angle (θ), aspect ratio (ω), and Reynolds number (Re). Drag coefficients, as a function of Re and θ, are in good agreement with literature and normalized drag coefficients followed the well-known sin 2 θ curve for all shapes. Normalized lift coefficients also showed good agreement with the literature. New correlations for fiber, disk, and scalene prolate are also suggested based on the regression of our data to calculate the drag and lift coefficients, which incorporates parametric effects of Re, θ, and ω.