Journal article
Prediction of Turbulent Flow Over Rough Surfaces Using a Force Field in Large Eddy Simulation
Journal of fluids engineering, Vol.125(1), pp.2-9
01/01/2003
DOI: 10.1115/1.1524587
Abstract
A force field model to simulate turbulent flow over a surface with arbitrary roughness is described. A given roughness is decomposed into resolved and subgrid-scale roughness, conceptually similar to the flow decomposition in large eddy simulation (LES). For a given flow and Reynolds number, a Cartesian grid is selected to satisfy LES requirements. This grid determines the geometric features of the roughness that are formally resolved. The force field used to represent this resolved roughness is determined during the LES solution process, without any empirical input. The subgrid roughness that is not resolved is modeled by a random force distribution in which a drag coefficient is specified. Use of this approach to model surface roughness is demonstrated by calculations of the flow in a duct with a wavy wall with superimposed fine-grain roughness.
Details
- Title: Subtitle
- Prediction of Turbulent Flow Over Rough Surfaces Using a Force Field in Large Eddy Simulation
- Creators
- Jie Cui - IIHR-Hydroscience and Engineering and Department of Mechanical Engineering, The University of Iowa, Iowa City, IA 52242-1585Virendra C Patel - IIHR-Hydroscience and Engineering and Department of Mechanical Engineering, The University of Iowa, Iowa City, IA 52242-1585Ching-Long Lin - IIHR-Hydroscience and Engineering and Department of Mechanical Engineering, The University of Iowa, Iowa City, IA 52242-1585
- Resource Type
- Journal article
- Publication Details
- Journal of fluids engineering, Vol.125(1), pp.2-9
- Publisher
- ASME
- DOI
- 10.1115/1.1524587
- ISSN
- 0098-2202
- eISSN
- 1528-901X
- Language
- English
- Date published
- 01/01/2003
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Mechanical Engineering; Radiology
- Record Identifier
- 9984064255702771
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