Numerical study of external turbulent flow

Mammar, M.; Soudani, A.

Rеvuе des Energies Renouvelables
Volume 15, Numéro 1, Pages 155-164
2012-03-31

Numerical Study Of External Turbulent Flow

Abstract

Flow around a cylinder on a fixed-bed open- channel is numerically studied. A CFD code is executed to analyze the flow fields and the kinetic energy field around the cylinder. A system of equations of two-dimensional and horizontal flow is obtained by the integration of the continuity and momentum equation for turbulent flow using (k - ε) standard model. The turbulent stresses are then expressed with the eddy-viscosity concept. The numerical simulation was done for four flows cases with different velocities. From the numerical results, the expected alteration of the flow field due to the presence of the cylinder is evident, notably the wake behind the cylinder. The measured velocities in the longitudinal and transversal directions and the kinetic energy are compared with those of the numerical simulation.