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Study of Pressure Distribution on an Irregular Octagonal Plan Oval-Shape Building Using CFD

Arun Kumar, Ritu Raj

Abstract


This paper aims to study the wind flow characteristics and to analyze the wind pressure distribution on the surfaces around an irregular octagonal plan shape building model. There is a central open space in plan to provide more surface area around the building for natural ventilation. Plan area of the building is 300 m2(excluding the open space) and height is 50 m. Steady state flow of wind with 5% turbulence (moderate turbulence) under atmospheric boundary layer has been taken in the study. Numerical simulation with standard k-e model using ANSYS (CFX) software has been used for the purpose. Flow characteristics has been studied in terms of flow separation, reattachment of flow, creation of wakes and vortices. The surface pressure generated around the model has been studied in terms of coefficient of pressure. The model is symmetrical about both the axes in plan. Hence, study for different wind angle of attacks from 0° to 90° @ 30° interval has been conducted. The flow characteristics and unusual or critical coefficient of pressure on surfaces of the model observed have been discussed.

 

Doi: 10.28991/cej-2021-03091760

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Keywords


Oval plan-Shape Building; ANSYS (CFX); Wind Pressure Coefficient; k-ε model.

References


R. K. Pradeep, V. Ehsan, and S. Azadeh, “Computational Fluid Dynamics Approach for High-rise Buildings,” Centre for Earthquake Engineering, IIIT Hyderabad, A3C-12, Report No. IIIT/TR/2013/-1, Hyderabad, (2013): 1–9.

W. D. Baines, “Effect of Velocity Distribution on Wind Loads on a Tall Building,” (1952).

Gomes, M. Glória, A. Moret Rodrigues, and Pedro Mendes. “Experimental and Numerical Study of Wind Pressures on Irregular-Plan Shapes.” Journal of Wind Engineering and Industrial Aerodynamics 93, no. 10 (October 2005): 741–756. doi:10.1016/j.jweia.2005.08.008.

Mohotti, D., P. Mendis, and T. Ngo. “Application of Computational Fluid Dynamics (CFD) in Predicting the Wind Loads on Tall Buildings - A Case study,” ." In 23rd Australasian Conference on the Mechanics of Structures and Materials, Byron Bay, Australia (ACMSM23), (December 2014): 1–6.

Zhao, J. G., and Kit Ming Lam. "Interference effects in a group of tall buildings closely arranged in an L-or T-shaped pattern." Wind & structures 11, no. 1 (2008): 1-18.

Amin, JA, and AK Ahuja. “Experimental Study of Wind-Induced Pressures on Buildings of Various Geometries.” International Journal of Engineering, Science and Technology 3, no. 5 (August 2, 2011). doi:10.4314/ijest.v3i5.68562.

Tanaka, Hideyuki, Yukio Tamura, Kazuo Ohtake, Masayoshi Nakai, and Yong Chul Kim. “Experimental Investigation of Aerodynamic Forces and Wind Pressures Acting on Tall Buildings with Various Unconventional Configurations.” Journal of Wind Engineering and Industrial Aerodynamics 107–108 (August 2012): 179–191. doi:10.1016/j.jweia.2012.04.014.

Amin, J. A., and A. K. Ahuja. “Effects of Side Ratio on Wind-Induced Pressure Distribution on Rectangular Buildings.” Journal of Structures 2013 (August 12, 2013): 1–12. doi:10.1155/2013/176739.

Chakraborty, Souvik, and Sujit Kumar Dalui. "Numerical Study of Surface Pressure on Square Plan Shape Tall Building." In Symposium on Sustainable Infrastructure Development (SID), February 8th to 9th, (2013): 252-258.

Bhattacharyya, Biswarup, Sujit K. Dalui, and Ashok K. Ahuja. "Wind induced pressure on ‘E’plan shaped tall buildings." Jordan Journal of Civil Engineering 8, no. 2 (2014): 120-134.

Kheyari, Pallab, and Sujit Kumar Dalui. "Estimation of wind load on a tall building under interference effects: a case study." Jordan Journal of Civil Engineering 9, no. 1 (2015): 84–101.

Roy, K., and A. Kumar Bairagi. "Wind pressure and velocity around stepped unsymmetrical plan shape tall building using CFD simulation—A case study." Asian Journal of Civil Engineering (BHRC) 17, no. 8 (2016): 1055-1075.

Mukherjee, A., and A. K. Bairagi. "Wind pressure and velocity pattern around ‘N’plan shape tall building—A case study." Asian Journal of Civil Engineering (BHRC) 18, no. 8 (2017): 1241-1258.

Bairagi, Amlan Kumar, and Sujit Kumar Dalui. “Distribution of Wind Pressure around Different Shape Tall Building.” Advances in Structures, Systems and Materials (2020): 31–38. doi:10.1007/978-981-15-3254-2_4.

Pal, Supriya, and Ritu Raj. “Evaluation of Wind Induced Interference Effects on Shape Remodeled Tall Buildings.” Arabian Journal for Science and Engineering 46, no. 11 (July 2, 2021): 11425–11445. doi:10.1007/s13369-021-05923-x.

Raj, Ritu, and Ashok Kumar Ahuja. "Wind loads on cross shape tall buildings." Journal of Academia and Industrial Research 2, no. 2 (2013): 111-113.

Ritu Raj, Rana T, Anchalia, and Khola U, “Numerical Study of Wind Excited Action on H Plan-Shaped Tall Building,” International Journal of Emerging Technologies 11, no. 3, (2020): 591–605.

Pal, Supriya, Ritu Raj, and S Anbukumar. “Comparative Study of Wind Induced Mutual Interference Effects on Square and Fish-Plan Shape Tall Buildings.” Sādhanā 46, no. 2 (April 28, 2021): 1-27. doi:10.1007/s12046-021-01592-6.

Nagar, Suresh K., Ritu Raj, and Nirendra Dev. "Experimental study of wind-induced pressures on tall buildings of different shapes." Wind and Structures 31, no. 5 (2020): 441-453. doi:10.12989/was.2020.31.5.431.

Quan, Yong, Jialu Chen, and Ming Gu. “Aerodynamic Interference Effects of a Proposed Taller High‐rise Building on Wind Pressures on Existing Tall Buildings.” The Structural Design of Tall and Special Buildings 29, no. 4 (January 7, 2020): e1703. doi:10.1002/tal.1703.

ANSYS Inc., “ANSYS CFX-Solver Theory Guide,” (2009).

Revuz, J., D.M. Hargreaves, and J.S. Owen. “On the Domain Size for the Steady-State CFD Modelling of a Tall Building.” Wind and Structures 15, no. 4 (July 25, 2012): 313–329. doi:10.12989/was.2012.15.4.313.

IS 875 (Part 3), “Design Loads (Other than Earthquake) for Building and Structures - Code of Practice Part 3 Wind Loads (Third Revision),” New Delhi: Bureau of Indian Standards, (2015).

Franke, J. “Impact of wind and storm on city life and built environment,” Recommendation on the use of CFD in Wind Engineering. In: COST action C14, vol. Version 1.0, (2004): 1–12.


Full Text: PDF

DOI: 10.28991/cej-2021-03091760

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