Numerical Simulation of the Turbulent Flow over a Three-Dimensional Flat Roof
The flow field over a flat roof model building has been numerically investigated in order to determine threedimensional CFD guidelines for the calculation of the turbulent flow over a structure immersed in an atmospheric boundary layer. To this purpose, a complete validation campaign has been performed through a systematic comparison of numerical simulations with wind tunnel experimental data. Wind tunnel measurements and numerical predictions have been compared for five different vertical positions, respectively from the upstream leading edge to the downstream bottom edge of the analyzed model. Flow field characteristics in the neighborhood of the building model have been numerically investigated, allowing a quantification of the capabilities of the CFD code to predict the flow separation and the extension of the recirculation regions. The proposed calculations have allowed the development of a preliminary procedure to be used as guidance in selecting the appropriate grid configuration and corresponding turbulence model for the prediction of the flow field over a three-dimensional roof architecture dominated by flow separation.
[1] T. Stathopoulos, "Wind Effects on People", Proceedings of the
International Conference on Urban Wind Engineering and Building
Aerodynamics - Impact of Wind Storm on City Life and Built
Environment, COST Action C14, Von Karman Institute, Rode-Saint-
Genèse (Belgium), 2004.
[2] P. Krishna, K. Kumar, N. M. Bhandari, IS:875 (Part3): Wind Loads on
Buildings and Structures - Proposed Draft & Commentary, Document
No. IITK-GSDMA-Wind02-V5.0 and IITK-GSDMA-Wind04-V3.0.
[3] N. M. Bhandari, P. Krishna, K. Kumar, A. Gupta, An Explanatory
Handbook on Proposed IS 875 (Part3) - Wind Loads on Buildings and
Structures, Document No. IITK-GSDMA-Wind06-V3.0.
[4] A. G. Jensen, J. Franke, C. Hirsch, M. Schatzmann, T. Stathopoulos, J.
Wisse, N. G. Wright, CFD Techniques - Computational Wind
Engineering, Proceedings of the International Conference on Urban
Wind Engineering and Building Aerodynamics - Impact of Wind and
Storm on City Life and Built Environment - Working Group 2, COST
Action C14, Von Karman Institute, Rode-Saint-Genèse (Belgium).
[5] A. G. Jensen, J. Franke, C. Hirsch, M. Schatzmann, T. Stathopoulos, J.
Wisse, N. G. Wright, Impact of Wind and Storm on City Life and Built
Environment - Working Group 2 - CFD Techniques - Computational
Wind Engineering, Proceedings of the International Conference on
Urban Wind Engineering and Building Aerodynamics, COST Action
C14, Von Karman Institute, Rhode-Saint-Genèse, Belgium, May 5-7,
2004.
[6] R. Yoshie, A. Mochida, Y. Tominaga, H. Kataoka, K. Harimoto, T.
Nozu, T. Shirasawa, "Cooperative Project for CFD Prediction of
Pedestrian Wind Environment in the Architectural Institute of Japan",
Journal of Wind Engineering and Industrial Aerodynamics, 95 (2007)
1551-1578.
[7] J. Franke, C. Hirsch, A. G. Jensen, H. W. Krus, M. Schatzmann, P. S.
Westbury, S. D. Miles, J. A. Wisse, N. G. Wright, "Recommendations
on the Use of CFD in Wind Engineering", Proceedings of the
International Conference on Urban Wind Engineering and Building
Aerodynamics, COST Action C14, Von Karman Institute, Rhode-Saint-
Genèse, Belgium, May 5-7, 2004.
[8] T. Stathopoulos, "Wind Effects on People", Proceedings of the
International Conference on Urban Wind Engineering and Building
Aerodynamics, COST Action C14, Von Karman Institute, Rhode-Saint-
Genèse, Belgium, May 5-7, 2004.
[9] Y. Ozmen, J. P. A. J. Van Beeck, E. Baydar, "The Turbulent Flow over
Three Dimensional Roof Modles Immersed in an Atmospheric
Boundary Layer", Proceedings of the International Conference on
Urban Wind Engineering and Building Aerodynamics, COST Action
C14, Von Karman Institute, Rhode-Saint-Genèse, Belgium, May 5-7,
2004.
[10] M. Raciti Castelli, A. Castelli, E. Benini, "Modeling Strategy and
Numerical Validation of the Turbulent Flow over a two-Dimensional
Flat Roof", World Academy of Science, Engineering and Technology,
Issue 79, July 2011, pp. 462-468.
[11] http://www.vki.ac.be/.
[12] B. Parmentier, R. Hoxey, J. M. Buchlin, P. Corieri, "The Assessment of
Full Scale Experimental Methods for Measuring Wind Effects on Low
Rise Buildings", COST Action C14, Impact of Wind and Storm on City
Life and Built Environment, June 3-4, 2002, Nantes, France.
[13] J. Counihan, "An Improved Method of Simulating an Atmospheric
Boundary Layer in a Wind Tunnel", Atmos. Environ., Vol. 3 (1969), pp.
197-214.
[14] http://www.vki.ac.be/index.php?option=com_content&view=article&id
=60:low-speed-wind-tunnel-l-2b&catid=48:low-speed-windtunnels&
Itemid=151.
[1] T. Stathopoulos, "Wind Effects on People", Proceedings of the
International Conference on Urban Wind Engineering and Building
Aerodynamics - Impact of Wind Storm on City Life and Built
Environment, COST Action C14, Von Karman Institute, Rode-Saint-
Genèse (Belgium), 2004.
[2] P. Krishna, K. Kumar, N. M. Bhandari, IS:875 (Part3): Wind Loads on
Buildings and Structures - Proposed Draft & Commentary, Document
No. IITK-GSDMA-Wind02-V5.0 and IITK-GSDMA-Wind04-V3.0.
[3] N. M. Bhandari, P. Krishna, K. Kumar, A. Gupta, An Explanatory
Handbook on Proposed IS 875 (Part3) - Wind Loads on Buildings and
Structures, Document No. IITK-GSDMA-Wind06-V3.0.
[4] A. G. Jensen, J. Franke, C. Hirsch, M. Schatzmann, T. Stathopoulos, J.
Wisse, N. G. Wright, CFD Techniques - Computational Wind
Engineering, Proceedings of the International Conference on Urban
Wind Engineering and Building Aerodynamics - Impact of Wind and
Storm on City Life and Built Environment - Working Group 2, COST
Action C14, Von Karman Institute, Rode-Saint-Genèse (Belgium).
[5] A. G. Jensen, J. Franke, C. Hirsch, M. Schatzmann, T. Stathopoulos, J.
Wisse, N. G. Wright, Impact of Wind and Storm on City Life and Built
Environment - Working Group 2 - CFD Techniques - Computational
Wind Engineering, Proceedings of the International Conference on
Urban Wind Engineering and Building Aerodynamics, COST Action
C14, Von Karman Institute, Rhode-Saint-Genèse, Belgium, May 5-7,
2004.
[6] R. Yoshie, A. Mochida, Y. Tominaga, H. Kataoka, K. Harimoto, T.
Nozu, T. Shirasawa, "Cooperative Project for CFD Prediction of
Pedestrian Wind Environment in the Architectural Institute of Japan",
Journal of Wind Engineering and Industrial Aerodynamics, 95 (2007)
1551-1578.
[7] J. Franke, C. Hirsch, A. G. Jensen, H. W. Krus, M. Schatzmann, P. S.
Westbury, S. D. Miles, J. A. Wisse, N. G. Wright, "Recommendations
on the Use of CFD in Wind Engineering", Proceedings of the
International Conference on Urban Wind Engineering and Building
Aerodynamics, COST Action C14, Von Karman Institute, Rhode-Saint-
Genèse, Belgium, May 5-7, 2004.
[8] T. Stathopoulos, "Wind Effects on People", Proceedings of the
International Conference on Urban Wind Engineering and Building
Aerodynamics, COST Action C14, Von Karman Institute, Rhode-Saint-
Genèse, Belgium, May 5-7, 2004.
[9] Y. Ozmen, J. P. A. J. Van Beeck, E. Baydar, "The Turbulent Flow over
Three Dimensional Roof Modles Immersed in an Atmospheric
Boundary Layer", Proceedings of the International Conference on
Urban Wind Engineering and Building Aerodynamics, COST Action
C14, Von Karman Institute, Rhode-Saint-Genèse, Belgium, May 5-7,
2004.
[10] M. Raciti Castelli, A. Castelli, E. Benini, "Modeling Strategy and
Numerical Validation of the Turbulent Flow over a two-Dimensional
Flat Roof", World Academy of Science, Engineering and Technology,
Issue 79, July 2011, pp. 462-468.
[11] http://www.vki.ac.be/.
[12] B. Parmentier, R. Hoxey, J. M. Buchlin, P. Corieri, "The Assessment of
Full Scale Experimental Methods for Measuring Wind Effects on Low
Rise Buildings", COST Action C14, Impact of Wind and Storm on City
Life and Built Environment, June 3-4, 2002, Nantes, France.
[13] J. Counihan, "An Improved Method of Simulating an Atmospheric
Boundary Layer in a Wind Tunnel", Atmos. Environ., Vol. 3 (1969), pp.
197-214.
[14] http://www.vki.ac.be/index.php?option=com_content&view=article&id
=60:low-speed-wind-tunnel-l-2b&catid=48:low-speed-windtunnels&
Itemid=151.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:61030", author = "M. Raciti Castelli and A. Castelli and E. Benini", title = "Numerical Simulation of the Turbulent Flow over a Three-Dimensional Flat Roof", abstract = "The flow field over a flat roof model building has been numerically investigated in order to determine threedimensional CFD guidelines for the calculation of the turbulent flow over a structure immersed in an atmospheric boundary layer. To this purpose, a complete validation campaign has been performed through a systematic comparison of numerical simulations with wind tunnel experimental data. Wind tunnel measurements and numerical predictions have been compared for five different vertical positions, respectively from the upstream leading edge to the downstream bottom edge of the analyzed model. Flow field characteristics in the neighborhood of the building model have been numerically investigated, allowing a quantification of the capabilities of the CFD code to predict the flow separation and the extension of the recirculation regions. The proposed calculations have allowed the development of a preliminary procedure to be used as guidance in selecting the appropriate grid configuration and corresponding turbulence model for the prediction of the flow field over a three-dimensional roof architecture dominated by flow separation.
", keywords = "CFD, roof, building, wind", volume = "6", number = "9", pages = "1987-7", }
