Comparative Study of Algebraic Wall Model and Differential Equation Wall Model in Large Eddy Simulation of Turbulent Channel Flow

Yıl 2018, Cilt: 9, 80 - 90, 28.12.2018

Muhammad Saiful İslam Mallik Mohammad Azizul Hoque Md. Ashraf Uddin

Öz

A large eddy simulation
(LES) is performed in a plane turbulent channel flow, where the near wall
region is approximated by algebraic wall model (AWM) and differential equation
wall model (DEWM). The simulation is performed by using a finite difference
method of second order accuracy in space and a low-storage explicit Runge-Kutta
method with third order accuracy in time. The computational results are
compared with those from direct numerical simulation (DNS) data. Comparing the
results throughout the calculation domain we have found that the results from
the LES with DEWM (LES-DEWM) approach show closer agreement with the DNS
results.

Anahtar Kelimeler

Large eddy simulation, turbulent channel flow, algebraic wall model

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