Flow in Channels With Rough Walls-Old and New Concepts

In our study we determine the influence of wall roughness on friction for pipe and channel flows by numerically calculating the entropy production in the flow. It turns out that there is an appreciable influence of wall roughness in laminar flows, though this effect often is neglected completely. In...

Full description

Saved in:
Bibliographic Details
Published inHeat transfer engineering Vol. 31; no. 8; pp. 658 - 665
Main Authors Herwig, H., Gloss, D., Wenterodt, T.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Philadelphia, PA Taylor & Francis Group 01.07.2010
Taylor & Francis
Taylor & Francis Ltd
Subjects
Applied fluid mechanics
Channel flow
Entropy
Exact sciences and technology
Fluid dynamics
Fluidics
Friction
Fundamental areas of phenomenology (including applications)
Heat transfer
Laminar flow
Mathematical analysis
Mathematical models
Physics
Pipes
Roughness
Surface roughness
Tribology
Walls
Rough wall
Laminar flow
Skin friction
Microchannel
Digital simulation
Roughness
Entropy
Modelling
Microstructure
Microfluidics
Online AccessGet full text

Cover

More Information
Summary:In our study we determine the influence of wall roughness on friction for pipe and channel flows by numerically calculating the entropy production in the flow. It turns out that there is an appreciable influence of wall roughness in laminar flows, though this effect often is neglected completely. In addition to the friction factor results, we gain an understanding of the physics since we have access to the dissipation distribution in the flow field close to the roughness elements. For a concise description of flows over rough walls there should be a reasonable choice of the wall location as well as the roughness parameter. Various options are discussed and assessed.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0145-7632
1521-0537
DOI:10.1080/01457630903466605