Numerical prediction of air flow within street canyons based on different two-equation k-ε models

Afiq Witri Muhammad Yazid, Nor Azwadi Che Sidik, Salim Mohamed Salim, Nur Hamizah Mohamad Yusoff

Research output: Contribution to journalArticle

Abstract

Numerical simulations on airflow within street canyons were performed to investigate the effect of the street aspect ratio and wind speed on velocity profiles inside a street canyon. Three-dimensional Standard, Renormalization Group (RNG) and Realizable k-ε turbulence model are employed using the commercial CFD code FLUENT to solve the Reynolds-averaged Navier-Stokes (RANS) equations. A comparison of the results from the presently adopted models with those previously published demonstrated that the k-e model is most reliable when simulating wind flow. The model is then employed to predict the flow structures in a street canyon for a range of aspect ratios (building height to street width ratio) between 0.5-2 at Reynolds number of 9000, 19200 and 30700 corresponding to the ambient wind speeds of 0.68m/s, 1.46m/s and 2.32m/s respectively. It is observed that the flow structure in the street canyon is influenced by the buildings aspect ratios and prevailing wind speeds. As the street aspect ratio increases, the air ventilation within the canyon reduces. © Published under licence by IOP Publishing Ltd.
Original languageEnglish
JournalIOP Conference Series: Materials Science and Engineering
Volume50
Issue number1
DOIs
Publication statusPublished - 2013
Event2nd International Conference on Mechanical Engineering Research - Pahang, Malaysia
Duration: 1 Jul 20134 Jul 2013

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Air
Aspect ratio
Flow structure
Turbulence models
Navier Stokes equations
Ventilation
Computational fluid dynamics
Reynolds number
Computer simulation

Keywords

  • Air ventilation
  • Building height
  • Numerical predictions
  • Prevailing winds
  • Renormalization group
  • Reynolds averaged Navier Stokes (RANS)equations
  • Street canyon
  • Velocity profiles
  • Air
  • Aspect ratio
  • Computational fluid dynamics
  • Computer integrated manufacturing
  • Flow structure
  • Mechanical engineering
  • Navier Stokes equations
  • Reynolds number
  • Statistical mechanics
  • Turbulence models
  • Wind effects
  • Numerical models

Cite this

Yazid, Afiq Witri Muhammad ; Sidik, Nor Azwadi Che ; Salim, Salim Mohamed ; Yusoff, Nur Hamizah Mohamad. / Numerical prediction of air flow within street canyons based on different two-equation k-ε models. In: IOP Conference Series: Materials Science and Engineering . 2013 ; Vol. 50, No. 1.
@article{e6c7067b76364eef94e84026aa9e371d,
title = "Numerical prediction of air flow within street canyons based on different two-equation k-ε models",
abstract = "Numerical simulations on airflow within street canyons were performed to investigate the effect of the street aspect ratio and wind speed on velocity profiles inside a street canyon. Three-dimensional Standard, Renormalization Group (RNG) and Realizable k-ε turbulence model are employed using the commercial CFD code FLUENT to solve the Reynolds-averaged Navier-Stokes (RANS) equations. A comparison of the results from the presently adopted models with those previously published demonstrated that the k-e model is most reliable when simulating wind flow. The model is then employed to predict the flow structures in a street canyon for a range of aspect ratios (building height to street width ratio) between 0.5-2 at Reynolds number of 9000, 19200 and 30700 corresponding to the ambient wind speeds of 0.68m/s, 1.46m/s and 2.32m/s respectively. It is observed that the flow structure in the street canyon is influenced by the buildings aspect ratios and prevailing wind speeds. As the street aspect ratio increases, the air ventilation within the canyon reduces. {\circledC} Published under licence by IOP Publishing Ltd.",
keywords = "Air ventilation, Building height, Numerical predictions, Prevailing winds, Renormalization group, Reynolds averaged Navier Stokes (RANS)equations, Street canyon, Velocity profiles, Air, Aspect ratio, Computational fluid dynamics, Computer integrated manufacturing, Flow structure, Mechanical engineering, Navier Stokes equations, Reynolds number, Statistical mechanics, Turbulence models, Wind effects, Numerical models",
author = "Yazid, {Afiq Witri Muhammad} and Sidik, {Nor Azwadi Che} and Salim, {Salim Mohamed} and Yusoff, {Nur Hamizah Mohamad}",
note = "Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Conference code: 102589 Export Date: 13 June 2014 Correspondence Address: Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Skudai, 81310, Johor Bahru, Malaysia References: Soulhac, L., Perkins, R.J., Salizzoni, P., (2008) Bound-Lay Meteorol., 126 (3), p. 365. , 10.1007/s10546-007-9238-x 0006-8314; Oke, T.R., (1998) Energ. Buildings, 11 (1-3), p. 103. , 10.1016/0378-7788(88)90026-6 0378-7788; Kovar, P.A., Louka, P., Sini, J.F., Savory, E., Czech, M., Abdelqari, A., Mestayer, P.G., Toy, N., (2002) Water Air Soil Poll., 2 (5-6), p. 237. , 10.1023/A:1021387418396 1567-7230; Afiq, W.M.Y., Azwadi, C.S.N., Saqr, K.M., (2012) Int. J. Mechanical Materials Eng., 7, p. 158; Mochida, A., Tominaga, Y., Murakami, S., Yoshi, R., Ishihara, T., Ooka, R., (2002) Wind Struct., 5, pp. 1226-6116; Tahseen, T.A., Ishak, M., Rahman, M.M., (2013) J Mech Eng Sci, 4, pp. 418-430. , 0022-2542; Tahseen, T.A., Ishak, M., Rahman, M.M., (2012) Inter J Automot Mech Eng, 6, pp. 753-765; Najiha, M.S., Rahman, M.M., Yusoff, A.R., Kadirgama, K., (2012) Inter J Automot Mech Eng, 6, pp. 766-774; Vardoulakis, S., Dimitrova, R., Richards, K., Hamlyn, D., Camilleri, G., Weeks, M., Sini, J.F., Moussiopoulos, N., (2011) Environ Model Assess., 16 (2), p. 169. , 10.1007/s10666-010-9236-0 1420-2026; Idris, M.S., Irwan, M.A.M., Ammar, N.M.M., (2012) J Mech Eng Sci, 2, pp. 206-216. , 0022-2542; Mohd Adib, M.A.H., Mohd Hasni, N.H., Osman, K., Maskon, O., Kadirgama, K., (2012) J Mech Eng Sci, 2, pp. 217-225. , 0022-2542; Meroney, R.N., Leitl, B.M., Rafailidis, S., Schatzmann, M., (1999) J. Wind Eng. Ind. Aerod., 81 (1-3), p. 333. , 10.1016/S0167-6105(99)00028-8 0167-6105; Chan, T.L., Dong, G., Leung, C.W., Cheung, C.S., Hung, W.T., (2002) Atmos. Environ., 36 (5), p. 861. , 10.1016/S1352-2310(01)00490-3 1352-2310; Baik, J.J., Kim, J., (1999) Electron. J. Appl. Meteorol., 38 (11), p. 1576. , 10.1175/1520-0450(1999)038<1576:ANSOFA>2.0.CO;2 0894-8763; Nazridoust, K., Ahmadi, G., (2006) J. Wind Eng. Ind. Aerod., 94 (6), p. 491. , 10.1016/j.jweia.2006.01.012 0167-6105; Allegrini, J., Dorer, V., Van Carmeliet, J., (2013) Build Environ., 59, p. 315. , 10.1016/j.buildenv.2012.08.029 0360-1323; (2005) FLUENT Documentation: User Guide, , ANSYS Inc; Ariff, M., Salim, S.M., Cheah, S.C., (2009) 7th International Conference on CFD in the Minerals and Process Industries CSIRO",
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Numerical prediction of air flow within street canyons based on different two-equation k-ε models. / Yazid, Afiq Witri Muhammad; Sidik, Nor Azwadi Che; Salim, Salim Mohamed; Yusoff, Nur Hamizah Mohamad.

In: IOP Conference Series: Materials Science and Engineering , Vol. 50, No. 1, 2013.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Numerical prediction of air flow within street canyons based on different two-equation k-ε models

AU - Yazid, Afiq Witri Muhammad

AU - Sidik, Nor Azwadi Che

AU - Salim, Salim Mohamed

AU - Yusoff, Nur Hamizah Mohamad

N1 - Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Conference code: 102589 Export Date: 13 June 2014 Correspondence Address: Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Skudai, 81310, Johor Bahru, Malaysia References: Soulhac, L., Perkins, R.J., Salizzoni, P., (2008) Bound-Lay Meteorol., 126 (3), p. 365. , 10.1007/s10546-007-9238-x 0006-8314; Oke, T.R., (1998) Energ. Buildings, 11 (1-3), p. 103. , 10.1016/0378-7788(88)90026-6 0378-7788; Kovar, P.A., Louka, P., Sini, J.F., Savory, E., Czech, M., Abdelqari, A., Mestayer, P.G., Toy, N., (2002) Water Air Soil Poll., 2 (5-6), p. 237. , 10.1023/A:1021387418396 1567-7230; Afiq, W.M.Y., Azwadi, C.S.N., Saqr, K.M., (2012) Int. J. Mechanical Materials Eng., 7, p. 158; Mochida, A., Tominaga, Y., Murakami, S., Yoshi, R., Ishihara, T., Ooka, R., (2002) Wind Struct., 5, pp. 1226-6116; Tahseen, T.A., Ishak, M., Rahman, M.M., (2013) J Mech Eng Sci, 4, pp. 418-430. , 0022-2542; Tahseen, T.A., Ishak, M., Rahman, M.M., (2012) Inter J Automot Mech Eng, 6, pp. 753-765; Najiha, M.S., Rahman, M.M., Yusoff, A.R., Kadirgama, K., (2012) Inter J Automot Mech Eng, 6, pp. 766-774; Vardoulakis, S., Dimitrova, R., Richards, K., Hamlyn, D., Camilleri, G., Weeks, M., Sini, J.F., Moussiopoulos, N., (2011) Environ Model Assess., 16 (2), p. 169. , 10.1007/s10666-010-9236-0 1420-2026; Idris, M.S., Irwan, M.A.M., Ammar, N.M.M., (2012) J Mech Eng Sci, 2, pp. 206-216. , 0022-2542; Mohd Adib, M.A.H., Mohd Hasni, N.H., Osman, K., Maskon, O., Kadirgama, K., (2012) J Mech Eng Sci, 2, pp. 217-225. , 0022-2542; Meroney, R.N., Leitl, B.M., Rafailidis, S., Schatzmann, M., (1999) J. Wind Eng. Ind. Aerod., 81 (1-3), p. 333. , 10.1016/S0167-6105(99)00028-8 0167-6105; Chan, T.L., Dong, G., Leung, C.W., Cheung, C.S., Hung, W.T., (2002) Atmos. Environ., 36 (5), p. 861. , 10.1016/S1352-2310(01)00490-3 1352-2310; Baik, J.J., Kim, J., (1999) Electron. J. Appl. Meteorol., 38 (11), p. 1576. , 10.1175/1520-0450(1999)038<1576:ANSOFA>2.0.CO;2 0894-8763; Nazridoust, K., Ahmadi, G., (2006) J. Wind Eng. Ind. Aerod., 94 (6), p. 491. , 10.1016/j.jweia.2006.01.012 0167-6105; Allegrini, J., Dorer, V., Van Carmeliet, J., (2013) Build Environ., 59, p. 315. , 10.1016/j.buildenv.2012.08.029 0360-1323; (2005) FLUENT Documentation: User Guide, , ANSYS Inc; Ariff, M., Salim, S.M., Cheah, S.C., (2009) 7th International Conference on CFD in the Minerals and Process Industries CSIRO

PY - 2013

Y1 - 2013

N2 - Numerical simulations on airflow within street canyons were performed to investigate the effect of the street aspect ratio and wind speed on velocity profiles inside a street canyon. Three-dimensional Standard, Renormalization Group (RNG) and Realizable k-ε turbulence model are employed using the commercial CFD code FLUENT to solve the Reynolds-averaged Navier-Stokes (RANS) equations. A comparison of the results from the presently adopted models with those previously published demonstrated that the k-e model is most reliable when simulating wind flow. The model is then employed to predict the flow structures in a street canyon for a range of aspect ratios (building height to street width ratio) between 0.5-2 at Reynolds number of 9000, 19200 and 30700 corresponding to the ambient wind speeds of 0.68m/s, 1.46m/s and 2.32m/s respectively. It is observed that the flow structure in the street canyon is influenced by the buildings aspect ratios and prevailing wind speeds. As the street aspect ratio increases, the air ventilation within the canyon reduces. © Published under licence by IOP Publishing Ltd.

AB - Numerical simulations on airflow within street canyons were performed to investigate the effect of the street aspect ratio and wind speed on velocity profiles inside a street canyon. Three-dimensional Standard, Renormalization Group (RNG) and Realizable k-ε turbulence model are employed using the commercial CFD code FLUENT to solve the Reynolds-averaged Navier-Stokes (RANS) equations. A comparison of the results from the presently adopted models with those previously published demonstrated that the k-e model is most reliable when simulating wind flow. The model is then employed to predict the flow structures in a street canyon for a range of aspect ratios (building height to street width ratio) between 0.5-2 at Reynolds number of 9000, 19200 and 30700 corresponding to the ambient wind speeds of 0.68m/s, 1.46m/s and 2.32m/s respectively. It is observed that the flow structure in the street canyon is influenced by the buildings aspect ratios and prevailing wind speeds. As the street aspect ratio increases, the air ventilation within the canyon reduces. © Published under licence by IOP Publishing Ltd.

KW - Air ventilation

KW - Building height

KW - Numerical predictions

KW - Prevailing winds

KW - Renormalization group

KW - Reynolds averaged Navier Stokes (RANS)equations

KW - Street canyon

KW - Velocity profiles

KW - Air

KW - Aspect ratio

KW - Computational fluid dynamics

KW - Computer integrated manufacturing

KW - Flow structure

KW - Mechanical engineering

KW - Navier Stokes equations

KW - Reynolds number

KW - Statistical mechanics

KW - Turbulence models

KW - Wind effects

KW - Numerical models

U2 - 10.1088/1757-899X/50/1/012012

DO - 10.1088/1757-899X/50/1/012012

M3 - Article

VL - 50

JO - IOP Conference Series: Materials Science and Engineering

JF - IOP Conference Series: Materials Science and Engineering

SN - 1757-8981

IS - 1

ER -