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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2023, Vol. 44 ›› Issue (11): 127673-127673.doi: 10.7527/S1000-6893.2022.27673

• Fluid Mechanics and Flight Mechanics • Previous Articles    

A sharp-interface immersed boundary method combined with wall model to simulate turbulent flow

Shizhao ZHANG, Jie WU(), Dewu YANG, Xinyu CONG   

  1. College of Aerodynamics,College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China
  • Received:2022-06-23 Revised:2022-09-26 Accepted:2022-10-11 Online:2023-06-15 Published:2022-10-14
  • Contact: Jie WU E-mail:wuj@nuaa.edu.cn
  • Supported by:
    National Natural Science Foundation of China(12072158);Natural Science Foundation of Jiangsu Province(BK20191271)

Abstract:

A robust sharp-interface immersed boundary method is proposed to simulate the incompressible turbulence flow over a solid obstacle. Based on the OpenFOAM, the solver combines the implicit split operator algorithm with the kω Shear Stress Transfer turbulence model to solve the velocity⁃pressure coupling in Navier⁃Stokes equations and the turbulent flow near the obstacle surface. The wall model is used to reduce the number of girds near the wall. The wall shear stress is obtained from the mirror point away from the wall, and the flow variables at image points are obtained using the surrounding flow field by Inverse Distance Weight (IDW). To validate the efficiency and accuracy of this method for simulation of incompressible turbulence flow, five turbulent flow cases are considered as follows: flow over a flat plate, flow pass a NACA0012 airfoil, Buice 2D diffuser, flow around a circular cylinder, and flow around a square cylinder. The simulation results show good agreement with literature, validating the efficiency and accuracy of the method proposed.

Key words: immersed boundary method, wall model, sharp interface, turbulence flow, OpenFOAM

CLC Number: