本文研究了冷壁面温度对疏水表面（θ=108.8°）上单个水滴冻结过程的影响,比较了水滴的冻结时间及冻结前后的形态变化。结果表明,水滴冻结所需要的时间随冷表面温度的降低而减小,冷表面温度越低,水滴冻结后其顶端越容易出现树枝状霜晶生长。最后,根据能量守恒原理建立了冷表面上水滴冻结的数学模型,给出了相应的表达式,进而分析了壁面温度对水滴冻结时长的影响,计算结果与实验结果一致。
The effect of cold plate temperature on water droplet freezing process on hydrophobic surface was investigated; the water droplet freezing time and freezing shape were compared. The experimental results showed the water droplet freezing time decreases with the decreasing of cold plate temperature. The lower the cold plate temperature is, the stronger the dendritic frost crystals grow on the frozen water droplet surface. A mathematic model for the water droplet freezing time was proposed based on energy conversation, the effect of cold plate temperature on water droplet freezing was analysed, and the prediction results of the model is in general agreement the experimental results.
参考文献
| [1] | Y. B. Lee;S. T. Ro .An experimental study of frost formation on a horizontal cylinder under cross flow[J].International Journal of Refrigeration,2001(6):468-474. |
| [2] | J.P. Hindmarsh;A.B. Russell;X.D. Chen .Experimental and numerical analysis of the temperature transition of a suspended freezing water droplet[J].International Journal of Heat and Mass Transfer,2003(7):1199-1213. |
| [3] | WANG Jieteng,LIU Zhongliang,GOU Yujun,ZHANG Xinhua,CHENG Shuiyuan.Deformation of freezing water droplets on a cold copper surface[J].中国科学E辑（英文版）,2006(05):590-600. |
| [4] | Zhongliang Liu;Yunjun Gou;Jieteng Wang;Shuiyuan Cheng .Frost formation on a super-hydrophobic surface under natural convection conditions[J].International Journal of Heat and Mass Transfer,2008(25/26):5975-5982. |
| [5] | Pan QM;Jin HZ;Wang H .Fabrication of superhydrophobic surfaces on interconnected Cu(OH)(2) nanowires via solution-immersion[J].Nanotechnology,2007(35):55605-1-55605-4-0. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%