A boundary reconstruction scheme for lattice Boltzmann flow simulation in porous media. (5th May 2009)

• Record Type: Journal Article
• Authors: Suga, K.; Tanaka, T.; Nishio, Y.; Murata, M.
• Is Part Of: Progress in computational fluid dynamics. Volume 9:Number 3-5(2009)
• Page Start: 201
• Page End: 207
• Publication Date: 2009-05-05
• Subjects: LBM -- lattice Boltzmann method -- porous media -- boundary reconstruction -- level set function -- flow simulation -- reinitialisation -- level set method -- drag coefficients -- shape representation -- prediction accuracy; Fluid dynamics -- Data processing -- Periodicals; Fluid dynamics -- Mathematics -- Periodicals; 620.10640285
• Languages: English
• ISSNs: 1468-4349

Abstract

A novel boundary reconstruction scheme is developed utilising the reinitialisation scheme of the Level Set Method (LSM). The proposed scheme transfers usual digitally defined step-like boundary data to continuously smooth surface data. It is confirmed that the lattice boltzmann simulation by the Interpolated Bounce-Back (IBB) Boundary Condition (BC) with the present scheme well reproduces the drag coefficients of a cylinder and a sphere. Then this numerical scheme is applied to simulate flows in porous media which have the body-centred cubic structure. The results indicate that the present scheme improves the shape representation and thus the prediction accuracy is less sensitive to grid resolutions.