Journal Article10.1063/1.2731434
Dropwise condensation on superhydrophobic surfaces with two-tier roughness
TL;DR: In this paper, the authors reported continuous dropwise condensation on a superhydrophobic surface with short carbon nanotubes deposited on micromachined posts, a two-tier texture mimicking lotus leaves.
read more
Abstract: Dropwise condensation can enhance heat transfer by an order of magnitude compared to film condensation. Superhydrophobicity appears ideal to promote continued dropwise condensation which requires rapid removal of condensate drops; however, such promotion has not been reported on engineered surfaces. This letter reports continuous dropwise condensation on a superhydrophobic surface with short carbon nanotubes deposited on micromachined posts, a two-tier texture mimicking lotus leaves. On such micro-/nanostructured surfaces, the condensate drops prefer the Cassie state which is thermodynamically more stable than the Wenzel state. With a hexadecanethiol coating, superhydrophobicity is retained during and after condensation and rapid drop removal is enabled.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Steam Condensation Enhancement by Applying Self-Assembled Monolayer (Chlorosilane) on Titanium Corrugated Tubes
Nae-Hyun Kim,Ho-Seung Han +1 more
TL;DR: In this article, it was shown that dropwise condensation enhances the condensation heat transfer coefficient significantly compared with film condensation, and it is well known that Dropwise Condensation enhances heat transfer.
1
Surface Preparation: Some Techniques
Mahesh Kumar Yadav,Praveen M. Somwanshi,Sameer Khandekar,Sanghamitro Chatterjee,Mohit Gonga,Krishnamurthy Muralidhar,Sudeep Bhattacharjee +6 more
- 01 Jan 2020
TL;DR: In this article, five surface engineering techniques, namely silanization of glass, chemical texturing of copper, anodization of aluminum, laser micro-machining of the copper surface, and ion implantation, are discussed.
1
Patent
Hot Gas Chamber
Peter Luger
- 14 Dec 2009
TL;DR: In this paper, the internal surface of the combustion chamber wall was further developed at least in areas for avoiding a film condensation, which is a common problem in a hot gas chamber for a power unit for the discharge of hot gas flow.
1
•Dissertation
Numerical Study of Cloud-Sized Droplet Impact and Freezing on Superhydrophobic Surfaces
Attarzadeh Niaki,Seyed Mohammad Reza +1 more
- 01 Jan 2017
TL;DR: In this paper, a multi-region transient solver for incompressible, laminar, multi-phase flow of non-isothermal, non-Newtonian fluids with conjugate heat transfer boundary conditions between solid and fluid regions was developed to simulate both the dynamics of the micro-droplet impact on the substrate and the associated heat transfer inside the droplet and the solid bulk simultaneously.
1
References
Characterization and Distribution of Water-repellent, Self-cleaning Plant Surfaces
TL;DR: The importance of roughness and water-repellency, respectively, as the basis of an anti-adhesive, self-cleaning surface, in comparison to other functions of microstructures, is discussed.
2.7K
Synthesis of Large Arrays of Well-Aligned Carbon Nanotubes on Glass
TL;DR: Large panels of aligned carbon nanotubes can be made under conditions that are suitable for device fabrication under plasma-enhanced hot filament chemical vapor deposition.
Superhydrophobic Carbon Nanotube Forests
Kenneth K. S. Lau,José Bico,Kenneth B. K. Teo,Manish Chhowalla,Gehan A. J. Amaratunga,William I. Milne,Gareth H. McKinley,Karen K. Gleason +7 more
TL;DR: In this paper, the creation of a stable, superhydrophobic surface using the nanoscale roughness inherent in a vertically aligned carbon nanotube forest together with a thin conformal hydrophobic poly(tetrafluoroethylene) (PTFE) coating on the surface of the nanotubes was demonstrated.