Title: Drag reduction by dimples? - A complementary experimental/numerical investigation
Authors: Lienhart, Hermann
Breuer, Michael  
Köksoy, Cagatay
Language: en_US
Subject (DDC): DDC - Dewey Decimal Classification::000 Informatik, Wissen, Systeme
DDC - Dewey Decimal Classification::500 Naturwissenschaften
DDC - Dewey Decimal Classification::600 Technik
Issue Date: 2008
Publisher: Elsevier
Document Type: Article
Source: In: International journal of heat and fluid flow. - Amsterdam [u.a.] : Elsevier Science, 1979- ; ZDB-ID: 2015204-8 . - Bd. 29.2008, 3, Seite 783-791
Journal / Series / Working Paper (HSU): International Journal of Heat and Fluid Flow 
Volume: 29
Issue: 3
Page Start: 783
Page End: 791
Publisher Place: Amsterdam
The paper is concerned with an experimental and numerical investigation of the turbulent flow over dimpled surfaces. Shallow dimples distributed regularly over the wall of a plane channel with large aspect ratio are used to study their effect on the friction drag. The resulting pressure drop in the channel was measured for smooth and dimpled walls. In addition to these investigations on internal flows, an external flow study was performed and boundary-layer profiles were measured using a Pitot-tube rake. Complementary to the measurements, direct numerical simulations for the internal flow configuration with and without dimples were carried out for two different grid resolutions and analyzed in detail. The objective was to clarify whether or not dimples cause reduction of the skin-friction drag. © 2008 Elsevier Inc. All rights reserved.
Organization Units (connected with the publication): Strömungsmechanik 
URL: https://api.elsevier.com/content/abstract/scopus_id/43949140176
ISSN: 0142727X
DOI: 10.1016/j.ijheatfluidflow.2008.02.001
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