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Wind flow on rural area in the northern part of malaysia by using computational fluid dymanics (cfd)

Wind flow on rural area in the northern part of malaysia by using computational fluid dymanics (cfd) / Ng Heng Kar
Angin ribut angin, menyebabkan kerosakan di atas bumbung. Bumbung diangkatkan oleh angin semasa angin ribut dan sendi bumbung mengalami kegagalan untuk memegang kepingan bumbung. Reka bentuk geometri bangunan akan memberi kesan kepada corak aliran angin di seluruh bangunan. Taburan tekanan di permukaan bangunan adalah berbeza. Reka bentuk geometri adalah bentuk bumbung, sudut bumbung, dimensi bangunan (puncaknya, lebar, panjang), penyambungan bangunan, sudut tepi yang tajam, dan bentuk mungkin lebih kompleks bangunan. Orientasi bangunan, termasuk laluan di antara dua buah rumah, dan susunan selari. Kaedah CFD digunakan untuk menentukan pekali tekanan, Cp pada permukaan bangunan untuk membuat tafsiran dan halaju kontur mengelilingi bangunan yang digunakan untuk mengukur kekuatan pergerakan udara mengelilingi bangunan. Hasil kajian menunjukkan bahawa bangunan itu dengan lebihhang bumbung akan mengalami tansion tinggi di bahagian bawah lebih-hang bumbung, kawasan permukaan yang lebih besar daripada muka angin akan mewujudkan kecerunan yang lebih besar daripada tekanan di seluruh bangunan yang membawa mengubah dan mod seret untuk bangunan, bahagian tunggal bangunan lanjutan akan mendorong Cp negatif lebih tinggi pada sambungan bahagian tengah lanjutan sampingan. Untuk pelbagai bangunan kes, Cp negatif yang tinggi terletak di dinding dan bumbung di sebelah laluan, perpisahan kritikal adalah 10 m dan ia menyababkan halaju tertinggi 40 m/s dalam petikan dari halaju masuk daripada 33.5 m/s. _______________________________________________________________________________________________________ Wind storm because damage is mostly on the roof. The roof is uplift by wind during the wind storm event, and the roof joints are failure to hold the roof sheet. Geometry design of building will affect the wind flow pattern across building. Pressure distribution on the surface of building is different. The geometry design is shape of roof, angle of roof, dimension of building (its height, width, long), extension of building, sharp edge corner, and maybe more complex shape of the building. The orientation of the building, include the spacing between two houses and its parallel arrangementCFD method is used to determine pressure coefficients, Cp on the building surfaces to make interpretation and velocity contour surround a building is used to determined air motion strength surround the building. The results show that the building with over-hang roof will experience high tension at the part below over-hang roof, larger surface area of windward face will create larger gradient of pressure across the building which bring overturn and drag mode to building, single side extension building will induce higher negative Cp at the middle part connection of side extension. For multi-buildings cases, high negative Cp is located at wall and roof beside passage, critical separation is 10 m and it induced highest velocity of 40 m/s in the passage from inlet velocity of 33.5 m/s.
Contributor(s):
Ng Heng Kar - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875005559
Language:
English
Subject Keywords:
Wind; roof; Geometry
First presented to the public:
6/1/2015
Original Publication Date:
7/23/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Civil Engineering
Citation:
Extents:
Number of Pages - 81
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-07-23 10:26:00.891
Submitter:
Mohd Jasnizam Mohd Salleh

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Wind flow on rural area in the northern part of malaysia by using computational fluid dymanics (cfd)1 2020-07-23 10:26:00.891