000013878 001__ 13878
000013878 005__ 20161115094004.0
000013878 04107 $$aeng
000013878 046__ $$k2016-08-21
000013878 100__ $$aAttarzadeh, Reza
000013878 24500 $$aA numerical study of the effect of roughness topology on surface hydrophobicity

000013878 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000013878 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000013878 506__ $$arestricted
000013878 520__ $$2eng$$aUnderstanding the various effects of micro and sub-micron roughness on dynamics of micro-droplet is of interest for many industrial applications such as aerospace industries, spray coating, etc. In this paper, numerical modeling of roughness topology through series of micro arrays is performed to explore the direct effect of surface roughness on super-hydrophobic enhancement, droplet penetration depth, and droplet restitution coefficient. The comparative study is performed on smooth hydrophobic surface and three rough surfaces following similar pattern with varying width to pitch ratio. The intrinsic contact angle of 111◦ is applied to all surfaces. Mimicking the impact of cloud particles, the droplet size of 20 µm with terminal velocity of 1.6 m.s−1 is opted in this study. The simulation successfully captured different stages of a bouncing drop and the air beneath droplet . It was observed that decreasing the width to pitch ratio of arrays, will results in higher droplet mobility, and higher apparent contact angle.

000013878 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013878 653__ $$a

000013878 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000013878 720__ $$aAttarzadeh, Reza
000013878 8560_ $$ffischerc@itam.cas.cz
000013878 8564_ $$s125102$$uhttps://invenio.itam.cas.cz/record/13878/files/PO.FM06-1.07.91.pdf$$yOriginal version of the author's contribution as presented on CD, XMLout( page 844, code PO.FM06-1.07.91).
000013878 962__ $$r13812
000013878 980__ $$aPAPER