Lattice Boltzmann Method on Curvilinear Coordinates System: Flow around a Circular Cylinder
✍ Scribed by Xiaoyi He; Gary Doolen
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 465 KB
- Volume
- 134
- Category
- Article
- ISSN
- 0021-9991
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✦ Synopsis
equation using the Chapman-Enskog expansion [7,8].
Recent numerical experiments on complex flow systems
Using an interpolation-based strategy, the lattice Boltzmann method is extended to apply to general curvilinear coordinate sys- [9][10][11][12] have shown that the lattice Boltzmann method is tems. As an example, a cylindrical coordinate system is used to quantitatively accurate and computationally efficient.
simulate two-dimensional flow around a circular cylinder. Numeri-In addition to the above successes, current lattice Boltzcal simulations are carried out for impulsive initial conditions with mann methods can be made more computationally efficient Reynolds numbers up to 10 4 . The agreement of our results with previous computational and experimental results is satisfactory. by generalizing them to apply to irregular grids. The grid Compared with previous lattice Boltzmann simulations of the same in previous LB models has been limited to triangular, problem, our new approach greatly enhances the computational square, or cubic lattices. Needless to say, this limitation efficiency. ᮊ 1997 Academic Press greatly hampers the broad application of the LB method because an irregular grid is much more efficient for many practical problems. With an irregular mesh, curved bound-