SURFACE FREE ENERGY DIFFERENCE CRITERION FOR CONDENSATION MODES

MA Xuehu; CHEN Jiabin; XU Dunqi; LIN Jifang

您当前的位置：

首页 >

文章列表页 >

SURFACE FREE ENERGY DIFFERENCE CRITERION FOR CONDENSATION MODES

更新时间：2025-12-10

- SURFACE FREE ENERGY DIFFERENCE CRITERION FOR CONDENSATION MODES
- CIESC Journal Issue 5, (2002)
- 作者机构：
  
  大连理工大学化学工程研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 May 2002，
  
  Published：25 May 2002
- 稿件说明：
移动端阅览
MA Xuehu, CHEN Jiabin, XU Dunqi, et al. SURFACE FREE ENERGY DIFFERENCE CRITERION FOR CONDENSATION MODES[J]. CIESC Journal, 2002, (5).
DOI：

MA Xuehu, CHEN Jiabin, XU Dunqi, et al. SURFACE FREE ENERGY DIFFERENCE CRITERION FOR CONDENSATION MODES[J]. CIESC Journal, 2002, (5). DOI：

摘要

提出了蒸汽在固体表面上冷凝方式的表面自由能差判据

即冷凝温度下液体表面自由能与固体表面的表面自由能差大于 33.3mJ·m-2 时蒸汽在该表面上呈现滴状冷凝的必要条件 .当表面自由能差在 0与 33.3mJ·m-2范围内

表面强化冷凝传热的效果将取决于表面自由能差值的大小

差值越大

强化效果越明显 .这对深化表面涂层强化冷凝传热的机理以及选择传热表面涂层材料具有指导意义 .通过与文献报道实验结果的比较证实

该判据排除了静态接触角判据中测量温度的影响 .

Abstract

A surface free energy difference criterion

i.e.the surface free energy difference between condensate liquid at condensation temperature and solid surface

was proposed to predict whether filmwise or dropwise condensation of a vapor occurs on a solid surface.The critical surface free energy difference was considered to be 0.0333J·m -2 .The surface free energy of a solid can be calculated from the measured contact angles at room temperature for low surface-free-energy solid surfaces like polymer films.Consequently

it is more convenient and accurate to use the surface free energy rather than the contact angle to predict condensation mode because the surface free energy difference is independent of the temperature for contact angles measurement.It is of considerable significance to get more insights into the mechanism of condensation heat transfer enhancement by means of surface coatings.Meanwhile

the criterion is much helpful to choosing the coating materials that promote dropwise or dropwise-film coexisting condensation modes according to the condensing vapor.

关键词

Keywords

references

Views

509

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Research on the characterization of the molecular weight and its distribution of perfluoropolyether

The impact of novel flow channel structure with sudden-expansion ratio on seawater-activated battery

Study on flash evaporation characteristics as well as thermodynamic variation performance in liquid hydrogen tank during on-orbit venting

Progress of solar photo-thermo-catalysis for ammonia synthesis and decomposition under mild conditions

Study on synergistic modification of nitrogen-doped carbon coating and Ti⁴⁺ co-doping for lithium vanadium phosphate cathode materials

Related Author

No data

Related Institution

No data

⁰