Using this boundary condition that links the normal velocity and the pressure, the basic idea consists in calculating the Lattice Boltzmann populations at a boundary node thanks to the gradients of the fluid velocity. This paper describes the proposed LBM boundary conditions and its assessment on th
Optimizing lattice Boltzmann simulations for unsteady flows
β Scribed by A.M. Artoli; A.G. Hoekstra; P.M.A. Sloot
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 301 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0045-7930
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β¦ Synopsis
We present detailed analysis of a lattice Boltzmann approach to model time-dependent Newtonian flows. The aim of this study is to find optimized simulation parameters for a desired accuracy with minimal computational time. Simulation parameters for fixed Reynolds and Womersley numbers are studied. We investigate influences from the Mach number and different boundary conditions on the accuracy and performance of the method and suggest ways to enhance the convergence behavior.
π SIMILAR VOLUMES
The effects of the interaction between the open boundaries (inflow and outflow) and the fluid domain are studied in unsteady lattice Boltzmann (LB) simulations of fluid flow. The confined unsteady laminar flow past a square cylinder is used as test case due to the continuous vortex shedding generate
An algorithm has been developed for incorporating the effects of temperature into lattice Boltzmann simulations. Instead of modeling the internal energy as a moment of the distribution describing the flow of mass and momentum, the internal energy is modeled as a scalar field using a second distribut
We quantitatively evaluate the capability and accuracy of the lattice Boltzmann equation (LBE) for modeling flow through porous media. In particular, we conduct a comparative study of the LBE models with the multiple-relaxation-time (MRT) and the Bhatnagar-Gross-Krook (BGK) single-relaxation-time (S