A lattice bgk model for viscoelastic media
WebApr 10, 2024 · The microscale leakage channel of a contact deformation surface was then generated through the reconstruction of the rough surface with nanoscale precision, deterministic rough-peak contact analysis, and lattice leakage theory. The results showed that the spool deflection was the key factor affecting the leakage rate. WebThe Advantages of Lattice BGK Models. The use of a discrete model and a lattice architecture promotes the development of parallel algorithms that can significantly reduce processing time. The ability to view fluid particles at the molecular level allows for more complex geometries and greater accuracy of fluid parameters at the macroscopic level.
A lattice bgk model for viscoelastic media
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WebMar 1, 2003 · A three-dimensional lattice Boltzmann model with thirty two discrete velocity distribution functions for viscoelastic fluid is presented in this work. The model is based upon the... WebWe propose the lattice BGK models, as an alternative to lattice gases or the lattice Boltzmann equation, to obtain an efficient numerical scheme for the simulation of fluid dynamics. With a properly chosen equilibrium distribution, the Navier-Stokes equation is obtained from the kinetic BGK equation at the second-order of approximation.
WebDive into the research topics of 'A Lattice BGK Model for Viscoelastic Media'. Together they form a unique fingerprint. Sort by Weight Alphabetically Physics & Astronomy. BGK … WebA Lattice BGK Model for Viscoelastic Media (PDF) A Lattice BGK Model for Viscoelastic Media Yuefan Deng - Academia.edu Academia.edu no longer supports Internet Explorer.
WebJun 1, 2024 · A lattice Boltzmann model for the viscous shallow water equations with source terms 2024, Journal of Hydrology Show abstract A consistent thermal lattice Boltzmann method for heat transfer in arbitrary combinations of solid, fluid, and porous media 2024, Computer Methods in Applied Mechanics and Engineering Show abstract WebIn this paper, we will see that compared with the scalar-BGK models, the numerical schemes based on the vector-BGK models can reach the same accuracy with fewer dis-crete velocities. For example, the seven-velocity LBM based on the vector-BGK models is also available for the three-dimensional problems, while the scalar models seem to re-
WebNov 20, 1998 · A local second-order grid refinement scheme for the lattice–BGK model is proposed in this work. The refinement scheme and a boundary-fitting scheme for complicated geometries are applied to simulate a benchmark problem of flow past a cylinder in a channel with small and moderate Reynolds numbers. Previous article Next article …
WebNov 1, 2013 · A lattice Boltzmann (LB) model is developed for simulation of the flow of thinning-elastic fluids through porous media. This model applies the Oldroyd-B … pernthaler egonWebY. H. QIAN et al.: LATTICE BGK MODELS FOR THE NAVIER-STOKES EQUATION: ETC. 257 given below. The parameter p is the square modulus of the particle's velocity ci.The requirements of isotropy of a 4th-order tensor of velocity [8,9] and that of Galilean invariance impose some constraints on the weights tp , which are model dependent.We simply give … pernthaler transporteWebAug 1, 1997 · The classical lattice-Boltzmann scheme is extended in an attempt to represent visco-elastic fluids in two dimensions. At each lattice site, two new quantities are added. A suitable coupling of these quantities with the viscous stress tensor leads to a nonzero shear modulus and visco-elastic effects. A Chapman–Enskog expansion gives … pernthaler hubertWebJul 11, 2024 · In this study, the lattice Boltzmann method is applied on six types of fibrous filter media with lognormal-distribution models, which consider the influence of the solid fraction, number of fibers, and average fiber diameter. The influences of the filtration velocity and fiber layout on the resistance, efficiency, and quality factor are discussed. pernthaler fohnsdorfWebDec 1, 2010 · In this paper, a novel lattice Boltzmann scheme for the simulation of viscoelastic fluid flows which exhibit memory effects, has been presented. Our … pernthaler hubert sohn gmbhWebNov 17, 2014 · Malaspinas et al. [19, 20] and Su et al. construct an LBM scheme to simulate the evolution of the viscoelastic stress components through discretizing the constitutive equation with a modified convection-diffusion lattice Boltzmann mechanism; however, the model fails to reasonably explain the unphysical diffusive term of the viscoelastic stress ... pernthoner ingridWebLattice Boltzmann modeling of fluid flow This module provides an introduction to the lattice Boltzmann method, a powerful tool in computational fluid dynamics. The lesson is practice oriented and show, step by step, how to write a program for the lattice Boltzmann method. pernthoner