关键词: 介孔复合材料/
格子玻尔兹曼方法/
声子输运/
热导率
English Abstract
Lattice Boltzamn model of phonon heat conduction in mesoporous composite material
Feng Dai-Li,Feng Yan-Hui,
Shi Jun
1.School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Fund Project:Project supported by the National Natural Science Foundation of China (Grant No. 51422601) and the Fundamental Research Funds for the Central Universities, China (Grant No. FRF-TP-15-021A1).Received Date:03 May 2016
Accepted Date:24 June 2016
Published Online:05 December 2016
Abstract:In this paper, lattice Boltzmann method is used to simulate the phonon heat transport in NaCl@Al2O3 mesoporous composite material. Based on the Debye model, temperature coupling method is first proposed in the thermal simulation of mesoporous composite material, to calculate the effective thermal conductivity of mesoporous composite material with pores of various interface condition coefficient value, pore size, porositiy, shape and arrangement. Studies show that for the same porosity, the estimated thermal conductivity increases with increasing the value of diameter, showing the scale effect; for the same diameter, the estimated thermal conductivity decreases with increasing the value of porosity; for the same porosity and diameter, the estimated thermal conductivity decreases with increasing the value of interface condition coefficient p; porous shape and arrangement will affect thermal conductivity value, and the influences greatly increase with increasing the value of p.
Keywords: mesoporous composite material/
lattice Boltzmann method/
phonon heat transport/
thermal conductivity
