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|Title:||Large eddy simulation of ABL flow around a parabolic concave roof model||Authors:||Zulfadli Bin Abdul Latiff||Keywords:||DRNTU::Engineering::Mechanical engineering::Fluid mechanics||Issue Date:||2016||Abstract:||Numerical simulation by means of Large Eddy Simulation (LES) was carried out to study the effects of an Atmospheric Boundary Layer (ABL) flow around a parabolic concave roof model. The effects of inflow wind velocity and sag depth of the roof on time averaged drag coefficient, C_D , and pressure coefficient, C_P , was investigated. Reynolds number was kept above (2-3)*10^4 to allow for scalability. It was found that C_D increases as flow velocity increases, opposing the general trend for flow around a bluff body that C_D will decrease when Reynolds number increases. This is possibly due to the flow in the concaved region of the roof. C_P decreases on both the windward wall and leeward wall as flow velocity increases. As sag depth increases, C_D increases and the magnitude of C_P increases on both the windward wall and leeward wall.||URI:||http://hdl.handle.net/10356/68337||Rights:||Nanyang Technological University||Fulltext Permission:||restricted||Fulltext Availability:||With Fulltext|
|Appears in Collections:||MAE Student Reports (FYP/IA/PA/PI)|
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