微滑和热传输在形通道滑动器中,具有基于格子博尔兹曼方法的凸表面纹理
Jinwei Fang1,2, Xiaori Liu1, Tianqi Wang1
1School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China.
Nanomaterials (Basel, Switzerland)
|February 9, 2024
概括
格子博尔茨曼方法 (LBM) 在水力动力滑中有效地模拟微纹理表面,提高负载能力和减少摩擦. 这种先进的模拟方法捕获了详细的流动动态,优于传统模型.
科学领域:
- 部落学 (tribology) 是一个学科.
- 计算流体动力学的流体动力学.
- 热传递是一种热传递.
背景情况:
- 水力动力滑对于减少移动表面之间的摩擦至关重要.
- 了解形间隙中的流体流量和温度效应对于滑性能至关重要.
- 像雷诺兹方程这样的传统模型在捕捉复杂的流体现象方面存在局限性.
研究的目的:
- 研究微凸表面纹理对形通道中的微滑和热传递的影响.
- 为了比较格子博尔兹曼法 (LBM) 与雷诺兹方程用于滑分析.
- 分析不同微凸纹理形状对油膜压力和温度分布的影响.
主要方法:
- 不压缩的双分布格子 博尔兹曼法 (LBM) 用于微型滑和传热模拟.
- 与无限宽的滑器的分析溶液对抗LBM的验证.
- 为了进行比较分析,建立了三种微凸纹理形状.
主要成果:
- 与分析解决方案相比,LBM准确地预测了最大压力,其误差为1.11%.
- LBM捕捉了流场细节,如,这些细节在雷诺兹方程中被忽略了.
- 微凸表面纹理将最大油膜压力提高4.34%,并影响温度分布.
结论:
- LBM 是研究滑问题的合适方法,它比雷诺斯方程具有优势.
- 微凸表面纹理增强水力动力滑,增加承载能力,减少摩擦.
- 表面质地影响油膜温度分布,特定的质地导致更高的温度.
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