TY - GEN
T1 - CFD study of flow over parallel ridges with varying height and spacing
AU - Yik, Lee Chin
AU - Salim, Salim Mohamed
AU - Chan, Andrew
AU - Cheong, Cheah Siew
N1 - Conference code: 85243
Export Date: 13 June 2014
Correspondence Address: Yik, L. C.; Department of Mechanical, Manufacturing and Materials Engineering, Faculty of Engineering, University of Nottingham (Malaysia Campus), Jalan Broga, Semenyih, 43500 Selangor, Malaysia; email: [email protected]
References: Paterson, D.A., Apelt, C.J., Computation of wind flows over three-dimensional buildings (1986) J. Wind Eng. And Ind. Aerodynamics, 24, pp. 193-213; Zhang, Y.Q., Huber, A.H., Arya, S.P.S., Synder, W.H., Numerical Simulation to determine the effects of incident wind shear and turbulence on the flow around a building (1993) J. Wind Eng. And Ind. Aerodynamics, 46-47, pp. 129-134; Zhou, Y., Stathopoulos, T., A new technique for the numerical simulation of wind flow around buildings (1997) J. Wind Eng. And Ind. Aerodynamics, 72, pp. 137-147; Cowan, I.R., Castro, I.P., Robins, A.G., Numerical considerations for simulations of flow and dispersion around buildings (1997) J. Wind Eng. Ind. Aerodynamics, 67-68, pp. 535-545; Alexander, Y., Liu, H., Nikitin, N., Turbulent flow around a wall mounted cube: A direct numerical simulation (2006) Int. J. Heat and Mass Transfer, 27, pp. 994-1009; Ratnam, G.S., Vengadesan, S., Performance of two equation turbulence models for prediction of heat transfer over a wall mounted cube (2008) Int. J. Heat and Mass Transfer, 51, pp. 2834-2846; Lien, F.S., Yee, E., Cheng, Y., Simulation of mean flow and turbulence over a 2D building array using high resolution CFD and a distributed drag flow approach (2004) J. Wind Eng. And Ind. Aerodynamics, 92, pp. 117-158; Brown, M.J., Lawson, R.E., Decroix, D.S., Lee, R.E., (2000) Comparison of Centerline Velocity Measurements Obtained Around 2D and 3D Building Arrays in a Wind Tunnel, , Report LA-UR-01-4138, Los Alamos National Laboratory, Los Alamos
PY - 2010
Y1 - 2010
N2 - A CFD study is performed for a two-dimensional model to simulate and investigate the turbulent flow interactions between three parallel ridges. Velocity profiles and turbulent kinetic energies are presented to illustrate the effects of varying the ridge height and separation distance. The numerical results are validated against extensive atmospheric wind tunnel data obtained from USEPA. Studies on different mesh configurations and inbuilt Reynolds averaged Navier-Stokes (RANS) turbulence models shows that the standard k-ε model predicts the flow field most accurately in relation to the TKE. General flow patterns involve flow separation in the windward corners and recirculation behind each ridge. An amplification of the velocity and TKE are observed as the ridge height increases, whereas larger separations result in lower velocities and significant variation in downwind TKE values.
AB - A CFD study is performed for a two-dimensional model to simulate and investigate the turbulent flow interactions between three parallel ridges. Velocity profiles and turbulent kinetic energies are presented to illustrate the effects of varying the ridge height and separation distance. The numerical results are validated against extensive atmospheric wind tunnel data obtained from USEPA. Studies on different mesh configurations and inbuilt Reynolds averaged Navier-Stokes (RANS) turbulence models shows that the standard k-ε model predicts the flow field most accurately in relation to the TKE. General flow patterns involve flow separation in the windward corners and recirculation behind each ridge. An amplification of the velocity and TKE are observed as the ridge height increases, whereas larger separations result in lower velocities and significant variation in downwind TKE values.
KW - CFD
KW - Parallel ridges
KW - Separation and recirculation
KW - Turbulent kinetic energy
KW - Atmospheric wind tunnel
KW - Mesh configurations
KW - Numerical results
KW - Recirculations
KW - Reynolds-Averaged Navier-Stokes
KW - Separation distances
KW - Two dimensional model
KW - Velocity profiles
KW - Kinetic energy
KW - Navier Stokes equations
KW - Parallel flow
KW - Turbulence models
KW - Turbulent flow
KW - Computational fluid dynamics
M3 - Conference contribution
SN - 978-988182107-2
VL - 2
SP - 1206
EP - 1211
BT - Proceedings of the World Congress on Engineering 2010
T2 - World Congress on Engineering 2010
Y2 - 30 June 2010 through 2 July 2010
ER -