Smagorinsky model을 이용한 실린더 및 익형 주위의 LES 난류유동해석
TURBULENT FLOW ANALYSIS AROUND CIRCULAR CYLINDER AND AIRFOIL BY LARGE EDDY SIMULATION WITH SMAGORINSKY MODEL
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Abstract
As a computer has been continuously progressed to reduce R&D time and cost, the study of the flow physics has been significantly relied on the numerical method. Recently, Large Eddy Simulation(LES) has been widely used in CFD community to accurately capture the turbulent flows. The LES code requires high accuracy in time, as well as in space. Also, it should have strong robustness to ensure the convergence in various complicated flows. The objective of the present work is to develop a base code for LES simulation, having 2nd order accuracy in time and 4th order accuracy in space. To achieve the present objective, the four-step fractional step method was enhanced by adopting compact Pade’ scheme. The standard Smagorinsky model was implemented for the first stage of the present code development. The flows over a cylinder and an airfoil were successfully simulated
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