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가설 설정
- Analyzing heat transfer in the thin film region, simplifying assumptions are employed. One is that the film thickness variation along the s-axis is weak. The other is that the disjoining pressure gradient along the film flow can be neglected in comparison to that of the capillary pressure.
- 3(a). The extended meniscus formed on the heated wall is characterized by three regions: i) the adsorbed film region, where this film cannot be evaporated due to the high adhesion forces; ii) the evaporating thin film region, so called micro-region, where the major part of evaporation occurs; iii) the meniscus region, where the adhesion forces are negligible and the meniscus curvature radius is constant. In the evaporating thin film region, a one-dimensional laminar boundary layer approximation for the transverse liquid flow is used (see Fig.
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