CFD study of flow over parallel ridges with varying height and spacing

Lee Chin Yik, Salim Mohamed Salim, Andrew Chan, Cheah Siew Cheong

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.
Original languageEnglish
Title of host publicationProceedings of the World Congress on Engineering 2010
Pages1206-1211
Number of pages6
Volume2
Publication statusPublished - 2010
EventWorld Congress on Engineering 2010 - London, United Kingdom
Duration: 30 Jun 20102 Jul 2010

Conference

ConferenceWorld Congress on Engineering 2010
Abbreviated titleWCE 2010
CountryUnited Kingdom
CityLondon
Period30/06/102/07/10

Fingerprint

Computational fluid dynamics
Flow interactions
Flow separation
Turbulence models
Kinetic energy
Flow patterns
Turbulent flow
Wind tunnels
Amplification
Flow fields

Keywords

  • CFD
  • Parallel ridges
  • Separation and recirculation
  • Turbulent kinetic energy
  • Atmospheric wind tunnel
  • Mesh configurations
  • Numerical results
  • Recirculations
  • Reynolds-Averaged Navier-Stokes
  • Separation distances
  • Two dimensional model
  • Velocity profiles
  • Kinetic energy
  • Navier Stokes equations
  • Parallel flow
  • Turbulence models
  • Turbulent flow
  • Computational fluid dynamics

Cite this

Yik, L. C., Salim, S. M., Chan, A., & Cheong, C. S. (2010). CFD study of flow over parallel ridges with varying height and spacing. In Proceedings of the World Congress on Engineering 2010 (Vol. 2, pp. 1206-1211)
Yik, Lee Chin ; Salim, Salim Mohamed ; Chan, Andrew ; Cheong, Cheah Siew. / CFD study of flow over parallel ridges with varying height and spacing. Proceedings of the World Congress on Engineering 2010. Vol. 2 2010. pp. 1206-1211
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title = "CFD study of flow over parallel ridges with varying height and spacing",
abstract = "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.",
keywords = "CFD, Parallel ridges, Separation and recirculation, Turbulent kinetic energy, Atmospheric wind tunnel, Mesh configurations, Numerical results, Recirculations, Reynolds-Averaged Navier-Stokes, Separation distances, Two dimensional model, Velocity profiles, Kinetic energy, Navier Stokes equations, Parallel flow, Turbulence models, Turbulent flow, Computational fluid dynamics",
author = "Yik, {Lee Chin} and Salim, {Salim Mohamed} and Andrew Chan and Cheong, {Cheah Siew}",
note = "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: proxc2y@hotmail.com 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",
year = "2010",
language = "English",
isbn = "978-988182107-2",
volume = "2",
pages = "1206--1211",
booktitle = "Proceedings of the World Congress on Engineering 2010",

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Yik, LC, Salim, SM, Chan, A & Cheong, CS 2010, CFD study of flow over parallel ridges with varying height and spacing. in Proceedings of the World Congress on Engineering 2010. vol. 2, pp. 1206-1211, World Congress on Engineering 2010, London, United Kingdom, 30/06/10.

CFD study of flow over parallel ridges with varying height and spacing. / Yik, Lee Chin; Salim, Salim Mohamed; Chan, Andrew; Cheong, Cheah Siew.

Proceedings of the World Congress on Engineering 2010. Vol. 2 2010. p. 1206-1211.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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: proxc2y@hotmail.com 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

ER -

Yik LC, Salim SM, Chan A, Cheong CS. CFD study of flow over parallel ridges with varying height and spacing. In Proceedings of the World Congress on Engineering 2010. Vol. 2. 2010. p. 1206-1211