2009 | OriginalPaper | Buchkapitel
Simulation of Flow around Truss Girder with Extended Lattice Boltzmann Equation
verfasst von : Tiancheng Liu, Gao Liu, Hongbo Wu, Yaojun Ge, Fengchan Cao
Erschienen in: Computational Structural Engineering
Verlag: Springer Netherlands
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Based on the theory of turbulence and molecule kinetics, an extended Lattice Boltzmann equation (ELBE) is derived to solve turbulent flow, in which sub-grid turbulence model is introduced to simulate vortex viscosity as well as turbulence relaxation time to modify the normal LBGK equation. Further more, the ELBE is applied to predict aerodynamic forces and vortex shedding frequency of bridge truss girder, and an equivalent two-dimensional model is studied to solve truss girder considering block ratio.