Published 6 issues per year
ISSN Print: 1543-1649
ISSN Online: 1940-4352
Indexed in
Multiscale Lattice-Boltzmann Finite Difference Model for Thermal Conduction from Nanoscale Hot Spots
ABSTRACT
A mesoscale lattice-Boltzmann phonon model is combined with a macroscale finite difference model to study therman conduction in silicon. As a test case, a nanoscale hot spot is introduced in the system, and thermal conduction in the steady state is calculated. The resuts indicate that the temperature and heat flux are consistent at the boundary of different domains. The results show a temperature step at the spot boundary, while elsewhere, the results agree with thermal diffusion. The magnitude of the spot thermal boundary resistance seems to depend on the spot size and seems independent of system size, heat flux, and computational details. The results are compared with similar nanoscale models.
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