Robust thermal boundary conditions applicable to a wall along which temperature varies in lattice-gas cellular automata
- Robust thermal boundary conditions applicable to a wall along which temperature varies in lattice-gas cellular automata
- 심재완; 르네 가티뇰
- Issue Date
- PHYSICAL REVIEW E
- VOL 81, NO 4, 046703-1-046703-10
- We show that the heat exchange between fluid particles and boundary walls can be achieved by controlling the velocity change rate following the particles’ collision with a wall in discrete kinetic theory, such as the lattice-gas cellular automata and the lattice Boltzmann method. We derive a relation between the velocity change rate and temperature so that we can control the velocity change rate according to a given temperature boundary condition. This relation enables us to deal with the thermal boundary whose temperature varies along a wall in contrast to the previous works of the lattice-gas cellular automata. In addition, we present simulation results to compare our method to the existing and give an example in a microchannel with a high temperature gradient boundary condition by the lattice-gas cellular automata.
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