Large eddy simulation of ABL flow around a parabolic concave roof model
Zulfadli Bin Abdul Latiff
Date of Issue2016
School of Mechanical and Aerospace Engineering
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.
DRNTU::Engineering::Mechanical engineering::Fluid mechanics
Final Year Project (FYP)
Nanyang Technological University