SUPERHYDROPHOBIC SURFACES FOR DRAG REDUCTION
نویسندگان
چکیده
منابع مشابه
Superhydrophobic surfaces reduce drag
Rare and common The hot grains of tektite and obsidian that show up in HD 172555’s IR spectrum are small enough that the star’s radiation pressure would drive them away from their current 6-AU orbit within 0.1 million years. The SiO molecules would likely condense and reform minerals on the same time scale. Given that rocky planets take 100 My to form, catching a giant impact in HD172555, despi...
متن کاملDrag reduction on laser-patterned hierarchical superhydrophobic surfaces.
Hierarchical laser-patterned surfaces were tested for their drag reduction abilities. A tertiary level of surface roughness which supports stable Cassie wetting was achieved on the patterned copper samples by laser-scanning multiple times. The laser-fabricated micro/nano structures sustained the shear stress in liquid flow. A rheometer setup was used to measure the drag reduction abilities in t...
متن کاملDrag reduction on a patterned superhydrophobic surface.
We present an experimental study of a low-Reynolds number shear flow between two surfaces, one of which has a regular grooved texture augmented with a superhydrophobic coating. The combination reduces the effective fluid-surface contact area, thereby appreciably decreasing the drag on the surface and effectively changing the macroscopic boundary condition on the surface from no slip to limited ...
متن کاملDrag reduction properties of superhydrophobic mesh pipes
Even with the recent extensive study into superhydrophobic surfaces, the fabrication of such surfaces on the inside walls of a pipe remains challenging. In this work we report a convenient bi-layered pipe design using a thin superhydrophobic metallic mesh formed into a tube, supported inside another pipe. A flow system was constructed to test the fabricated bi-layer pipeline, which allowed for ...
متن کاملSuperhydrophobic Friction Reduction Microtextured Surfaces
Superhydrophobic surfaces are surfaces with fluid contact angles larger than 150o. Superhydrophobicity can be achieved by chemically modifying the surface or introducing texturing which increases the real or effective area of the surface. In this work we focus on the latter approach. If the texturing leads to a Cassie nonwetting state, the surface can also exhibit drag reduction characteristics...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Istituto Lombardo - Accademia di Scienze e Lettere - Rendiconti di Scienze
سال: 2014
ISSN: 2384-986X,1974-6989
DOI: 10.4081/scie.2014.177