Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

Simulation of incompressible viscous flows around moving objects by a variant of immersed boundary-Lattice Boltzmann method

Wu, J. and Shu, C. and Zhang, Y.H. (2010) Simulation of incompressible viscous flows around moving objects by a variant of immersed boundary-Lattice Boltzmann method. International Journal of Numerical Methods for Heat and Fluid Flow, 62 (3). pp. 327-354. ISSN 0961-5539

[img]
Preview
PDF (Zhang_YH_-_strathprints_-_Simulation_of_incompressible_viscous_flows_around_moving_objects_of_immersed_Boundary-Lattice_Boltzmann_method_Jan_2010.pdf)
Download (448Kb) | Preview

    Abstract

    A variant of immersed boundary-lattice Boltzmann method (IB-LBM) is presented in this paper to simulate incompressible viscous flows around moving objects. As compared with the conventional IB-LBM where the force density is computed explicitly by Hook's law or the direct forcing method and the non-slip condition is only approximately satisfied, in the present work, the force density term is considered as the velocity correction which is determined by enforcing the non-slip condition at the boundary. The lift and drag forces on the moving object can be easily calculated via the velocity correction on the boundary points. The capability of the present method for moving objects is well demonstrated through its application to simulate flows around a moving circular cylinder, a rotationally oscillating cylinder, and an elliptic flapping wing. Furthermore, the simulation of flows around a flapping flexible airfoil is carried out to exhibit the ability of the present method for implementing the elastic boundary condition. It was found that under certain conditions, the flapping flexible airfoil can generate larger propulsive force than the flapping rigid airfoil.

    Item type: Article
    ID code: 16707
    Keywords: immersed boundary method, lattice boltzmann method, moving objects, incompressible flow, velocity correction, non-slip condition, lagrangian-eulerian method, navier-stokes equations, Cartesian grid method, circular cylinder, fluid flows, numerical simulation, Mechanical engineering and machinery, Mechanics of Materials, Mechanical Engineering, Applied Mathematics, Computer Science Applications
    Subjects: Technology > Mechanical engineering and machinery
    Department: Faculty of Engineering > Mechanical and Aerospace Engineering
    Faculty of Science > Strathclyde Institute of Pharmacy and Biomedical Sciences
    Related URLs:
    Depositing user: Ms Katrina May
    Date Deposited: 29 Mar 2010 15:02
    Last modified: 27 Mar 2014 11:14
    URI: http://strathprints.strath.ac.uk/id/eprint/16707

    Actions (login required)

    View Item

    Fulltext Downloads: