Turbulence Model Selection for Low Reynolds Number Flows.
One of the major flow phenomena associated with low Reynolds number flow is the formation of separation bubbles on an airfoil's surface. NACA4415 airfoil is commonly used in wind turbines and UAV applications. The stall characteristics are gradual compared to thin airfoils. The primary criterion set for this work is the capture of laminar separation bubble. Flow is simulated for a Reynolds number of 120,000. The numerical analysis carried out shows the advantages and disadvantages of a few turbulence models. The turbulence models tested were: one equation Spallart Allmars (S-A), two equation SST K-ω, three equation Intermittency (γ) SST, k-kl-ω and finally, the four equation transition γ-Reθ SST. However, the variation in flow physics differs between these turbulence models. Procedure to establish the accuracy of the simulation, in accord with previous experimental results, has been discussed in detail.
Dept of Aerospace Engineering, Universiti Putra Malaysia, Selangor, 43400, Malaysia.
S M A
0000-0003-2583-571X
SM
Aftab
Dept of Aerospace Engineering, Universiti Putra Malaysia, Selangor, 43400, Malaysia.
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AS
Mohd Rafie
School of Aerospace Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, 14300, Pulau Pinang, Malaysia.
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NA
Razak
Dept of Aerospace Engineering, Universiti Putra Malaysia, Selangor, 43400, Malaysia.
K A
KA
Ahmad
D008962:Models, Theoretical; D014783:Viscosity