Effect of wind speed on the drag force and wall shear stress of domes in historical mosques of Iran: a case study

الموضوعات : فصلنامه شبیه سازی و تحلیل تکنولوژی های نوین در مهندسی مکانیک

Iman Pishkar ¹ (Department of Mechanical engineering, Payame Noor University (PNU),P.O.Box 19395-4697, Tehran, Iran)
Mehdi Jahangiri ² (Energy Research Center, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran.)
Rouhollah Yadollahi Farsani ³ (Energy Research Center, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran.)
Ayoub Khosravi Farsani ⁴ (Department of Mechanical Engineering, Faculty of Boroujen, Technical and Vocational University (TVU), Chaharmahal and Bakhtiari, Iran.)

تاريخ الإرسال : 05 الجمعة , رجب, 1444 تاريخ التأكيد : 10 الثلاثاء , ذو القعدة, 1444 تاريخ الإصدار : 12 الخميس , ذو القعدة, 1444

الکلمات المفتاحية: CFD, Climatic factors, Shear stress, Dome geometry, Historical mosques,

ملخص المقالة :

Climatic conditions have a great impact on the erosion of the coverage and the materials destruction of the dome gradually. Therefore, studying the shape and form of the dome in historic mosques can greatly assist to identify the affected points of the different types of the domes and provide solutions to prevent early destruction of the domes. In the present work, the turbulent flow of wind around the four samples of different domes is investigated, using ANSYS CFX software, to determine which parts of the dome geometry are most affected by wind and erosion. In the present work, for the first time, it will be tried to study different types of domes used in different climates and their geometric shapes, besides conducting research to prevent early erosion. The results demonstrated that a large vortex has shaped on the opposite side of the wind, which affects the area behind the dome and causes a negative pressure through velocity reduction. Also, the highest wind velocity is formed a little higher and hinder of the dome. The results of the shear stress on the crown of the dome for the four cases illustrated that for the dome type W4, the highest shear stress is about 15Pa on the face against the wind and it is about 12 Pa for that of W1 on the face opposite the wind. It should be noted that the position of the most stresses on the dome crown corresponding to the most damage to the building is estimated.

المصادر:

 

• Feizolahbeigi, A., Lourenço, P.B., Golabchi, M., Ortega, J., Rezazadeh, M. (2020). Discussion of the role of geometry, proportion and construction techniques in the seismic behavior of 16^th to 18^th century bulbous discontinuous double shell domes in central Iran. Journal of Building Engineering, 33: 101575.


• Bakhteari, S., Attarian, K. (2020). Geometry-based modeling for characterizing design and construction of Ourchin domes. Journal of Building Engineering, 29: 101199.


• (2020). Porticos, arches, domes and gardens, key elements of Persian architecture. https://www.tehrantimes.com/news/443707/Porticos-arches-domes-and-gardens-key-elements-of-Persian, accessed Jan. 3, 2020.


• Askari Chaverdi, A., Djamali, M. (2019). Sasanian Palaces of Persis According to the Absolute Chronology: Qal ‘a-ye Doxtar and Palace of Ardašīr I (Ātaškada) at Firūzābād, and the so-called Palace of Sarvestān, Iran. Archaeology Journal, 3(4): 23-32.


• Maroufi, H. (2020). Urban planning in ancient cities of Iran: understanding the meaning of urban form in the Sasanian city of Ardašīr-Xwarrah. Planning Perspectives, 35(6): 1055-1080.


• Vandaee, M., Tajbakhsh, R., Maghsoudi, R. (2013). Sassanid fire temple Discovered in Ardašīr Khore, Pars. Journal of American Science, 9: 105-114.


• Rezaeinia, A.A. (2018). Some Remarks on the Architectural Structure and Function of the Niasar Chahar Taq. Pazhoheshha-ye Bastan Shenasi Iran, 8(17): 141-160.


• Golombek, L., Wilber, D. (1988). The Timurid architecture of Iran & Turan. Princeton University Press, Princeton, New Jersey, United States.


• Gye, D.H. (1988). Arches and domes in Iranian Islamic Buildings: An engineer's perspective. Iran, 26(1): 129-144.


• Escrig, F. (1988). Towers & domes. WIT Press, Southampton SO40 7AA, UK.


• Grube, E.J., Dickie, J. (1995). Architecture of the Islamic world, its history & social meaning. George (EDT) Michell., William Morrow, NY.


• Ashkan, M., Ahmad, Y. (2010). Discontinuous double-shell domes through Islamic eras in the Middle East and central Asia: History, morphology, typologies, geometry, and construction. Nexus Network Journal, 12(2): 287-319.


• Ashkan, M., Ahmad, Y. (2012). Significance of conical and polyhedral domes in persia and surrounding areas: morphology, typologies and geometric characteristics. Nexus Network Journal, 14(2): 275-290.


• Yari, F., Silvayeh, S., Goodarzi, M., Amin, A., Hoorshenas, R. (2016). The Stability of Dome Structures in the Iranian Traditional Architecture, Case Study: Dome of Taj-al-Molk. Journal of Architectural Engineering Technology, 5(2):164.


• Shiri, T., Momeni, K. (2020). Investigation of the effects of sunlight on the surface of the domes of mosques in desert areas. The Journal of Geographical Research on Desert Areas, 8(1): 215-242.


• Behnamian, S., Behnamian, S., Fogh, F., Pashaei, F., Saran, M.M. (2020). Novelty architecture and mathematics in an Iranian mosque. Journal of Islamic Architecture, 6(1): 7-12.


• Danaeinia, A., Heydari Dehcheshmeh, M., Rahman, S. (2020). The Structural Solution of Light Suppling in Iranian Domeshouses. Iran University of Science & Technology, 30(1): 44-53.


• Faghih, A.K., Bahadori, M.N. (2009). Experimental investigation of air flow over domed roofs. Iranian Journal of Science and Technology Transaction B: Engineering, 33(3): 207–216.


• Cheng, C.M., Fu, C.L. (2010). Characteristic of wind loads on a hemispherical dome in smooth flow and turbulent boundary layer flow. Journal of Wind Engineering and Industrial Aerodynamics, 98(6-7): 328-344.


• Faghih, A.K., Bahadori, M.N. (2011). Thermal performance evaluation of domed roofs. Energy and Buildings, 43(6): 1254–1263.


• Abohela, I., Hamza, N., Dudek, S. (2013). Effect of roof shape on energy yield and positioning of roof mounting wind turbines. Renewable Energy, 50: 1106–1118.


• Sun, Y., Qiu, Y., Wu, Y. (2013). Modeling of wind pressure spectra on spherical domes. International Journal of Space Structures, 28(2): 87-99.


• Mahdavinejad, M., Javanroodi, K. (2014). Efficient roof shapes through wind flow and indoor temperature, case studies: Flat roofs and domed roofs. Armanshahr Architecture & Urban Development, 7(12): 55-68.


• Soleimani, Z., Calautit, J.K., Hughes, B.R. (2016). Computational analysis of natural ventilation flows in geodesic dome building in hot climates. Computation, 4(3): 31.


• Zhou, Y., Li, Y., Zhang, Y. and Yoshida, A., (2018). Characteristics of wind load on spatial structures with typical shapes due to aerodynamic geometrical parameters and terrain type. Advances in Civil Engineering, 2018: 9738038.


• Khosrowjerdi, S., Sarkardeh, H. and Kioumarsi, M., (2021). Effect of wind load on different heritage dome buildings. The European Physical Journal Plus, 136: 1-18.


• Khosrowjerdi, S. and Sarkardeh, H., (2022). Effect of wind load on combined arches in dome buildings. The European Physical Journal Plus, 137(2): 227.


• Nejati, A., Sadeghi, H. and Heristchian, M., (2023). Wind effect on scallop domes with negative amplitude and prominence using Experimental and Numerical Study. International Journal of Space Structures, 09560599231166897


• Farsani, R.Y., Mahmoudi, A., Jahangiri, M. (2020). How a conductive baffle improves melting characteristic and heat transfer in a rectangular cavity filled with gallium. Thermal Science and Engineering Progress, 16: 100453.


• Farsani, R.Y., Raeiszadeh, F., Jahangiri, M., Afrand, M. (2020). Melting characteristics of paraffin wax in a rectangular cavity under steady rotations. Journal of the Taiwan Institute of Chemical Engineers, 113: 135-141.


• Jahangiri, M., Saghafian, M., & Sadeghi, M. R. (2015). Numerical simulation of hemodynamic parameters of turbulent and pulsatile blood flow in flexible artery with single and double stenoses. Journal of Mechanical Science and Technology, 29: 3549-3560.


• Jahangiri, M., Saghafian, M., & Sadeghi, M. R. (2015). Effects of non-Newtonian behavior of blood on wall shear stress in an elastic vessel with simple and consecutive stenosis. Biomedical and Pharmacology Journal, 8(1): 123-131.


• Sharifzadeh, B., Kalbasi, R., Jahangiri, M., Toghraie, D., & Karimipour, A. (2020). Computer modeling of pulsatile blood flow in elastic artery using a software program for application in biomedical engineering. Computer methods and programs in biomedicine, 192: 105442.


• Jahangiri, M., Haghani, A., Ghaderi, R., & Hosseini Harat, S. M. (2018). Effect of non-Newtonian models on blood flow in artery with different consecutive stenosis. ADMT Journal: 11(1), 79-86.


• ANSYS, Inc. (2009). Filtered Navier-Stokes Equations, ANSYS FLUENT 12.0 Theory Guide. https://www.afs.enea.it/project/neptunius/docs/fluent/html/th/node94.htm, accessed Jan., 23, 2009.


• ANSYS, Inc. (2009). Standard k-Model, ANSYS FLUENT 12.0 Theory Guide. https://www.afs.enea.it/project/neptunius/docs/fluent/html/th/node58.htm, accessed Jan., 23, 2009.


• Jahangiri, M., Saghafian, M., Sadeghi, M.R., (2014). Numerical study of hemodynamic parameters in pulsatile turbulent blood flow in flexible artery with stenosis. In The 22^st Annual International Conference on Mechanical Engineering-ISME2014, Shahid Chamran University, Ahvaz, Iran.


• Moradicheghamahi, J., Sadeghiseraji, J., Jahangiri, M. (2019). Numerical solution of the Pulsatile, non-Newtonian and turbulent blood flow in a patient specific elastic carotid artery. International Journal of Mechanical Sciences, 150: 393-403.


• Jahangiri, M., Saghafian, M. (2011). Numerical simulation of climb and dispersion of pollutants in different atmospheric condition. In the 19th Annual Conference on Mechanical Engineering-ISME2011, Birjand, Iran.


• Pritchard, P.J., Mitchell, J.W. (2016). Fox and McDonald's Introduction to Fluid Mechanics. John Wiley & Sons. New Jersey, United States.


• Khosrowjerdi, S., Sarkardeh, H. (2021). Effect of arch height on wind load in shape dome structure, Amirkabir Journal of Civil Engineering, 53(2): 627-638.