We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Theory, Analysis, and Applications of the Entropic Lattice Boltzmann Model for Compressible Flows.
- Authors
Frapolli, Nicolò; Chikatamarla, Shyam; Karlin, Ilya
- Abstract
The entropic lattice Boltzmann method for the simulation of compressible flows is studied in detail and new opportunities for extending operating range are explored. We address limitations on the maximum Mach number and temperature range allowed for a given lattice. Solutions to both these problems are presented by modifying the original lattices without increasing the number of discrete velocities and without altering the numerical algorithm. In order to increase the Mach number, we employ shifted lattices while the magnitude of lattice speeds is increased in order to extend the temperature range. Accuracy and efficiency of the shifted lattices are demonstrated with simulations of the supersonic flow field around a diamond-shaped and NACA0012 airfoil, the subsonic, transonic, and supersonic flow field around the Busemann biplane, and the interaction of vortices with a planar shock wave. For the lattices with extended temperature range, the model is validated with the simulation of the Richtmyer–Meshkov instability. We also discuss some key ideas of how to reduce the number of discrete speeds in three-dimensional simulations by pruning of the higher-order lattices, and introduce a new construction of the corresponding guided equilibrium by entropy minimization.
- Subjects
MACH number; RICHTMYER-Meshkov instability; LATTICE Boltzmann methods; SUPERSONIC flow; FLOW simulations; TRANSONIC flow; SUBSONIC flow; COMPRESSIBLE flow
- Publication
Entropy, 2020, Vol 22, Issue 3, p370
- ISSN
1099-4300
- Publication type
Article
- DOI
10.3390/e22030370