张丹,郑海坤,陈孝松,张培成,盛伟,郝晓茹.超疏水表面多尺寸液滴撞击冻结特性的模拟研究[J].表面技术,2025,54(6):173-181, 239.
ZHANG Dan,ZHENG Haikun,CHEN Xiaosong,ZHANG Peicheng,SHENG Wei,HAO Xiaoru.Simulation Investigation of Multi-size Droplet Impact and Freeze on Superhydrophobic Surfaces[J].Surface Technology,2025,54(6):173-181, 239 |
| 超疏水表面多尺寸液滴撞击冻结特性的模拟研究 |
| Simulation Investigation of Multi-size Droplet Impact and Freeze on Superhydrophobic Surfaces |
| 投稿时间：2024-04-20 修订日期：2024-08-30 |
| DOI：10.16490/j.cnki.issn.1001-3660.2025.06.016 |
| 中文关键词: 过冷水滴 表面 相变 动力学特性 传热分析 数值模拟 |
| 英文关键词:supercooled water droplets surface phase change kinetic properties heat transfer analysis numerical simulation |
| 基金项目:国家自然科学基金(52266001);河南省科技攻关项目(232102241014);河南省高等学校重点科研项目(22A470002);河南理工大学博士基金资助项目(B2021-37) |
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| Author | Institution |
| ZHANG Dan | School of Mechanical and Power Engineering, Henan Polytechnic University, Henan Jiaozuo 454000, China |
| ZHENG Haikun | School of Mechanical and Power Engineering, Henan Polytechnic University, Henan Jiaozuo 454000, China;Hami Yu-Xin Energy Industry Institute Co., Ltd, Xinjiang Hami 839000, China |
| CHEN Xiaosong | School of Mechanical and Power Engineering, Henan Polytechnic University, Henan Jiaozuo 454000, China |
| ZHANG Peicheng | School of Mechanical and Power Engineering, Henan Polytechnic University, Henan Jiaozuo 454000, China |
| SHENG Wei | School of Mechanical and Power Engineering, Henan Polytechnic University, Henan Jiaozuo 454000, China;Hami Yu-Xin Energy Industry Institute Co., Ltd, Xinjiang Hami 839000, China |
| HAO Xiaoru | School of Mechanical and Power Engineering, Henan Polytechnic University, Henan Jiaozuo 454000, China |
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| 中文摘要: |
| 目的 研究不同直径过冷液滴撞击超疏水表面的动力学特性和传热特性。方法 以宏观结冰/结霜过程中过冷水滴的撞击结冰为背景，运用CLSVOF方法，结合凝固-融化模型，对直径为3 000、2 375、1 750、1 125 μm的水滴撞击结冰行为进行了模拟研究，从动力学和传热学角度定量分析了水滴撞击结冰过程，获得了水滴撞击结冰动态图。结果 不同直径的液滴撞击超疏水壁面所经历的动态过程类似，但随着液滴直径的增大，液滴撞击壁面不同阶段所需的时间、液滴最大铺展面积以及液滴与壁面的接触时间均会增加，依次递增了3.691、4.444和5.867 ms;液滴撞击壁面的传热量随着液滴的铺展过程逐渐增大，在达到最大传热量后随着液滴回缩而下降，最终趋近于0 W，且直径较大的液滴达到最大铺展时其传热量的波动较明显。液滴与壁面的传热速率在铺展阶段和回缩阶段都有所增加，随着液滴逐渐弹离而趋近于0 W/s，较大直径水滴会导致更高的传热量。结论 液滴直径对撞击过程的动力学和热力学特性具有显著的影响，研究结果可为超疏水表面多尺寸液滴的有效去除和防冰提供新参考。 |
| 英文摘要: |
| The work aims to study the dynamics and heat transfer characteristics of superhydrophobic surfaces of supercooled droplets with different diameters, and verify the accuracy of the simulations by comparing them with existing experiments and other simulations. Based on the background of the impact of supercooled water droplets in the macroscopic freezing/frosting process, CLSVOF method and solidification-melting model were used to adopt supercooled water droplets with diameters of 3 000, 2 375, 1 750 and 1 125 μm to impact the wall at 1.4 m/s under a temperature of −15 ℃. There were four impact types. The impact of water droplets on icing behavior was simulated. For the superhydrophobic wall surface with a small hysteresis angle, the static contact angle model was used in this example, and the contact angle was 163°. The icing behavior of water droplets hitting was simulated and studied, and the icing dynamics of water droplets hitting were quantitatively analyzed from the perspectives of kinetics and heat transfer, and the dynamic diagram of water droplet impact icing was obtained. The maximum wetting area obtained by simulation was in good agreement with the experimental results, and the deviation was less than 13%. The above results illustrated the feasibility of the simulation to analyze the following icing process of supercooled water droplets. The dynamic process of droplets with different diameters hitting the superhydrophobic wall was similar, but with the increase of the droplet diameter, the time required for the droplets to hit the wall at different stages, the maximum spreading area of the droplets, and the contact time between the droplets and the wall increased by 3.691, 4.444 and 5.867 ms respectively. The simulation results were slightly faster than the experimental results because the static contact angle model used in the simulation ignored the effect of the hysteresis angle. The contact time of the 3 mm droplet was 16.784 ms, and the maximum spreading area was 4.07×10−5 mm2. The contact time of a 1.125 mm droplet was 3.416 ms and the maximum spreading area was 2.76×10−6 mm2. The droplet contact time difference between the two scales was about 4.9 times, and the maximum spreading area had an order of magnitude difference, so the droplet diameter had a great impact on the heat transfer between the droplet and the surface. The heat transfer curves of droplets with different diameters hitting the wall surface show the same trend with time, which firstly increases gradually with the spreading process of the droplets, decreases with the droplet retraction after reaching the maximum heat transfer, and finally approaches 0 W. When the droplet reaches the maximum spreading, the heat transfer of the droplet with a diameter of 3 000 μm fluctuates significantly, because the upper part of the droplet will oscillate strongly before and after the maximum spreading time of the larger droplet, resulting in the change of air bubbles between the surface and the droplet. Through the slope of different stages, it can be seen that with the increase of droplet diameter, the heat transfer rate between the droplet and the wall increases in the spreading stage and the retraction stage, and then approaches 0 W/s as the droplet gradually springs off, and the large diameter water droplet will lead to higher heat transfer compared with the small diameter water droplet. The droplet diameter has a significant effect on the kinetic and thermodynamic properties of the impact process, and the relevant parameters obtained by the simulation are compared with the known experiments and other simulations, which proves the accuracy of the simulation method, and the research results can provide a new reference for the effective removal and anti-icing of multi-size droplets on superhydrophobic surfaces. |
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