| 曾霖,赵云华.水平振动下近壁颗粒动力学特性研究[J].高技术通讯(中文),2025,35(6):662~674 |
| 水平振动下近壁颗粒动力学特性研究 |
| Dynamic characteristics of near-wall particles under horizontal vibration |
| |
| DOI：10. 3772 / j. issn. 1002-0470. 2025. 06. 010 |
| 中文关键词: 颗粒-壁面相互作用； 水平振动； 颗粒旋转速度； 速度分布函数； 动能各向异性 |
| 英文关键词: solid-wall interactions, horizontal vibration, particle rotational velocity, velocity distribution function, kinetic energy anisotropy |
| 基金项目: |
| 作者 | 单位 | | 曾霖 | (浙江工业大学机械工程学院杭州 310014) | | 赵云华 | (浙江工业大学机械工程学院杭州 310014) |
|
| 摘要点击次数: 11 |
| 全文下载次数: 15 |
| 中文摘要: |
| 颗粒与壁面的相互作用对颗粒流的运动有着重要影响，掌握近壁颗粒的运动规律是建立颗粒动力学壁面边界模型的基础。本文对水平简谐振动随机粗糙壁面上的球形颗粒运动进行实验测量，通过二维图像信息获取颗粒二维平动速度和三维旋转速度，并统计分析不同壁面振动频率、颗粒直径、单层颗粒浓度下的颗粒运动特性。结果表明，颗粒沿驱动方向的速度分布呈双峰或多峰高斯分布，而其他方向的速度分布呈单峰高斯分布；颗粒平动能量与旋转能量分配与均分定理相悖，具有较强的各向异性。结合以往理论，本文提出了带修正系数的能量分布关系式。 |
| 英文摘要: |
| The interaction between particles and the wall surface has an important influence on the motion of particle flow, and mastering the motion law of near-wall particles is the basis for establishing the wall boundary model of particle dynamics. In this paper, the motion of spherical particles on a horizontal simple harmonic vibration random rough wall surface is measured experimentally, and the two-dimensional translational velocity and three-dimensional rotational velocity of the particles are obtained through two-dimensional image information, and the particle motion characteristics under different wall vibration frequencies, particle diameters, and monolayer particle concentrations are analyzed statistically. The results show that the velocity distribution of particles along the driving direction is bimodal or multimodal Gaussian, while the velocity distribution in other directions is unimodal Gaussian; the particle advective and rotational energy distributions are in contradiction with the equalization theorem and have strong anisotropy. Combined with the previous theories, this paper proposes the relational equation of energy distribution with correction coefficients. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
