KAN Ankang, KANG Liyun, CAO Dan, et al. Thermal conduction characteristic of nano-granule porous material using lattice-Boltzmann method[J]. CIESC Journal, 2015, (11): 4412-4417.
KAN Ankang, KANG Liyun, CAO Dan, et al. Thermal conduction characteristic of nano-granule porous material using lattice-Boltzmann method[J]. CIESC Journal, 2015, (11): 4412-4417.DOI: 10.11949/j.issn.0438-1157.20150532.
a method is proposed for constructing three-dimensional mesoscopic physical model of nanoparticle porous materials
based on the random statistical theory. The spatial distribution of particles
particle size and porosity can be adjusted according to actual microscopic information of the porous material. D3Q15LBM model is employed to perform numerical simulation and analysis in mesoscopic scale. And the influence of particle diameter
porosity and other factors on thermal conductivity of porous media is analyzed. That is
the thermal conductivity will decrease with the increase of particle size for constant porosity; the thermal conductivity falls and then rises as the porosity increases for constant particle size; the uniformity of particle size plays an important role on the thermal property. The simulation results are nearly the same with the experimental ones. The research will be an excellent reference for optimization of thermal performance and prediction of effective thermal conductivity for aerogels.