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国际多尺度计算工程期刊
影响因子: 1.016 5年影响因子: 1.194 SJR: 0.554 SNIP: 0.68 CiteScore™: 1.18

ISSN 打印: 1543-1649
ISSN 在线: 1940-4352

国际多尺度计算工程期刊

DOI: 10.1615/IntJMultCompEng.v6.i2.50
pages 169-178

Multiscale Lattice-Boltzmann Finite Difference Model for Thermal Conduction from Nanoscale Hot Spots

Pekka Heino
Tampere University of Technology, Department of Electronics

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.