Affiliation:
1. IIHR-Hydroscience and Engineering and Department of Mechanical Engineering, The University of Iowa, Iowa City, IA 52242-1585
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.
Reference21 articles.
1. Nikuradse, J., 1950, “Laws of Flow in Rough Pipes,” National Advisory Committee for Aeronautics, NACA TM 1292 (translation from VDI-Forschungsheft 361, 1933).
2. Adams, J. C., and Hodge, B. K., 1977, “The Calculation of Compressible, Transitional, Turbulent and Relaminarizational Boundary Layers Over Smooth and Rough Surfaces Using an Extended Mixing Length Hypothesis,” AIAA Paper No. 77-682.
3. Lin, T. C., and Bywater, R. J., 1980, “The Evaluation of Selected Turbulence Models for High-Speed Rough-Wall Boundary Layer Calculations,” AIAA Paper No. 80-0132.
4. Finson, M. L., 1982, “A Model for Rough Wall Turbulent Heating and Skin Friction,” AIAA Paper No. 82-0199.
5. Christoph, G. H., and Pletcher, R. H., 1983, “Prediction of Rough-Wall Skin Friction and Heat Transfer,” AIAA J., 21, pp. 509–515.
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28 articles.
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