| 刘毅诚， 李培超.液滴撞击恒温多孔介质表面的数值模拟[J].轻工机械,2022,40(3):59-65 |
| 液滴撞击恒温多孔介质表面的数值模拟 |
| Numerical Simulation of Droplet Impacting on Thermostatic Porous Media Surface |
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| DOI：10.3969/j.issn.1005 2895.2022.03.010 |
| 中文关键词: 多孔介质 液滴 局部热平衡 铺展 渗透 FLUENT |
| 英文关键词:porous media droplet LTE（Local Thermal Equilibrium） spreading penetration FLUENT |
| 基金项目:上海市自然科学基金(19ZR1421400)。 |
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| 中文摘要: |
| 为探究多孔介质物性参数对液滴撞击动力学的影响，笔者基于恒温多孔材料的表面温度Tp、孔隙度Φ、平均颗粒直径dp以及接触角θ等参数对液滴变形过程进行了数值研究。借助计算流体力学软件FLUENT进行数值模拟，基于局部热平衡（local thermal equilibrium， LTE）假设，观察液滴在宏观概化多孔介质模型中的铺展与渗透过程。研究发现：液滴的铺展和渗透之间是相互竞争的。恒温多孔介质的表面温度越高，液滴的渗透能力越强；孔隙率越大，液滴的渗透深度越大；平均颗粒直径越小，液滴的铺展半径越大；液滴的接触角越大，湿润性能则越差，铺展半径越小。 |
| 英文摘要: |
| In order to explore the effect of physical parameters of porous media on droplet impact dynamics, the droplet deformation process was numerically investigated from surface temperature (Tp), porosity (Φ), average particle diameter (dp) and contact angle (θ) of thermostatic porous materials. Numerical simulation was carried out with the help of computational fluid dynamics software FLUENT. Based on the assumption of local thermal equilibrium (LTE), the spreading and penetration processes of droplets in the macroscopic generalized porous media model were observed. It is found that droplet spreading and penetration are in competition with each other. The higher the surface temperature of thermostatic porous media is, the stronger the permeability of droplet is;the larger the porosity is, the larger the penetration depth of the droplet is; the smaller the average particle diameter is, the larger the droplet spreading radius is; the larger the contact angle of droplet is, the worse the wetting performance and the smaller the spreading radius are. |
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