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Verlagsausgabe
DOI: 10.5445/IR/1000029073
Veröffentlicht am 14.11.2018
Originalveröffentlichung
DOI: 10.1088/1742-6596/318/2/022028
Scopus
Zitationen: 7

Effects of spatially varying slip length on friction drag reduction in wall turbulence

Hasegawa, Y.; Frohnapfel, B.; Kasagi, N.

Abstract:
A series of direct numerical simulation has been made of turbulent flow over hydrophobic surfaces, which are characterized by streamwise periodic micro-grooves. By assuming that the size of micro-grooves is much smaller than the typical length-scale of nearwall turbulent structures, the dynamical boundary condition is expressed by a mobility tensor, which relates the slip velocity and the surface shear stress. Based on the derived mathematical relationship between the friction drag and different dynamical contributions, it is shown how the turbulence contribution can be extracted and analyzed.


Zugehörige Institution(en) am KIT Institut für Strömungslehre (ISL)
Publikationstyp Zeitschriftenaufsatz
Jahr 2011
Sprache Englisch
Identifikator ISSN: 1742-6596
URN: urn:nbn:de:swb:90-290731
KITopen-ID: 1000029073
Erschienen in Journal of Physics: Conference Series
Band 318
Seiten 022028
Nachgewiesen in Scopus
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