Journal
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
Volume 341, Issue -, Pages 113-132Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2018.06.034
Keywords
Micro-texture; Inverse design; Cassie-Baxter mode; Super-hydrophobicity; Topology optimisation
Funding
- Humboldt Research Fellowship [1197305]
- National Natural Science Foundation of China [51405465, 61727813, 51605124, 51675506]
- Youth Innovation Promotion Association of the Chinese Academy of Sciences [2018253]
- Guest Professor Fellowship at the Karlsruhe Institute of Technology (KIT) via the DFG Metacoil project [KO 1883/20-1]
- ERC Senior Grant (NMCEL) [290586]
- Karlsruhe School of Optics and Photonics (KSOP)
- Cluster of Excellence BrainLinksBrainTools (DFG) [EXC 1086]
Ask authors/readers for more resources
The robust Cassie-Baxter mode of the wetting behaviour on a micro-textured solid surface, is a key topography element yielding stable super-hydrophobicity. To meet this purpose, we propose an inverse computational design procedure for the discovery of suitable periodic micro-textures, based on three different tilings of the plane. The symmetric tiles of the lattice are regular triangles, quadrangles, and hexagons. The goal of the inverse design procedure is to achieve the robust Cassie-Baxter state, in which the liquid/vapour interface is mathematically described using the Young-Laplace equation on the lattice, and a topology optimisation approach is utilised to construct a variational problem for the inverse design procedure. Based on numerical calculations of the constructed variational problem, underlying effects are revealed for several factors, including the Bond number, duty ratio, feature size, and lattice constant. The effects of feature size and lattice constant provide approaches for compromisingly considering the robustness of the Cassie-Baxter mode and manufacturability of the inversely designed micro-textures; the effect of the lattice constant permits the scaling properties of the derived patterns, and this in turn provides an approach to avoid the elasto-capillary instability driven collapse of the micro/nanostructures in the derived micro-textures. Further, a monolithic inverse design procedure for the periodic micro-textures is proposed in the conclusions, with synthetically considering the manufacturability as well as contact angle and surface-volume ratio of the liquid bulge held by the supported liquid/vapour interface. (C) 2018 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available