A laminar roughness boundary condition
- 10 October 1995
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Fluid Mechanics
- Vol. 300, 59-70
- https://doi.org/10.1017/s0022112095003600
Abstract
A modified slip boundary condition is obtained to represent the effects of small roughness-like perturbations to an otherwise-plane fixed wall which is acting as a boundary to steady laminar flow of a viscous fluid. In its simplest form, for low local Reynolds number and small roughness slope, this boundary condition involves a constant apparent backflow at the mean surface or, equivalently, represents a shift of the apparent plane boundary toward the flow domain. Extensions of the theory are also made to include finite local Reynolds number and finite roughness slope.This publication has 4 references indexed in Scilit:
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- Conditional Reynolds stress on a V-grooved surfacePhysics of Fluids, 1994
- Roughness-induced generation of crossflow vortices in three-dimensional boundary layersTheoretical and Computational Fluid Dynamics, 1994
- Determination of the macroscopic (partial) slip boundary condition for a viscous flow over a randomly rough surface with a perfect slip microscopic boundary conditionPhysics of Fluids, 1988