|
|
| |
| 不同壁面条件下液滴撞击铺展特性的模拟研究 |
| Simulation Study on Spreading Characteristics of Droplet Impinging under Different Wall Conditions |
| 投稿时间：2021-06-21 修订日期：2021-08-01 |
| DOI： |
| 中文关键词: CLSVOF方法 液滴撞击 动态接触角 壁面温度 |
| 英文关键词:CLSVOF method droplet impinging dynamic contact angle wall temperature |
| 基金项目:壁面特性与换热综合影响下液滴撞击相变行为的SPH方法研究 |
|
| 摘要点击次数: 294 |
| 全文下载次数: 0 |
| 中文摘要: |
| 摘 要：液滴撞击不同润湿性壁面的传热流动问题在自然界和工业生产中广泛存在。研究采用CLSVOF方法，引入描述壁面润湿特性的动态接触角，并考虑液滴物性参数随温度的变化，建立液滴撞壁模型，模拟研究液滴撞击流动行为，通过与实验对比验证，确定模型有效性。在此基础上，对传热作用下考虑壁面润湿性的液滴撞击问题展开研究，探讨壁面传热作用对液滴撞击铺展特性的影响。研究表明：在撞击过程中，液滴先铺展后逐渐收缩，与静态接触角模型相比，采用动态接触角模型所得的液滴流动特性与实验结果更加吻合；随着接触角增大，液滴在撞壁初期不易铺展，随后则易于收缩；虽然固液传热作用会影响液滴铺展直径，但不改变液滴的运动趋势。 |
| 英文摘要: |
| Abstract: The heat transfer and flow problems of droplet impinging different wettability walls are widely exist in nature and industrial production. The research adopts the CLSVOF method with dynamic contact angle, and considers the change of droplet physical parameters with temperature. The model of droplet impinging on the wall is established to simulate the process of droplet impinging and flowing, and the validity of the model is verified by comparing with the experiment results. On this basis, the study on the impinging of droplet considering the wettability of the wall under the effect of heat transfer is also carried out, and the effect of heat transfer on spreading characteristics of droplet is investigated. The research shows that during the impinging process, the droplet spreads first and then gradually shrinks. Compared with the results of the static contact angle model, the spreading characteristics of droplet obtained by the dynamic contact angle model are more consistent with the experimental results. As the contact angle increases, it is difficult for the droplet to spread at the beginning of impinging and then easily shrink. Although the heat transfer affects the droplet spreading diameter, it does not change the spreading trend of droplet. |
| 查看/发表评论 下载PDF阅读器 |
