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MCBTE

swMATH ID: 47642
Software Authors: Pathak, Abhishek; Pawnday, Avinash; Roy, Aditya Prasad; Aref, Amjad J.; Dargush, Gary F.; Bansal, Dipanshu
Description: MCBTE: a variance-reduced Monte Carlo solution of the linearized Boltzmann transport equation for phonons. MCBTE solves the linearized Boltzmann transport equation for phonons in three-dimensions using a variance-reduced Monte Carlo solution approach. The algorithm is suited for both transient and steady-state analysis of thermal transport in structured materials with size features in the nanometer to hundreds of microns range. The code is portable and integrated with both first-principles density functional theory calculations and empirical relations for the input of phonon frequency, group velocity, and mean free path required for calculating the thermal properties. The program outputs space- and time-resolved temperature and heat flux for the transient study. For the steady-state simulations, the frequency-resolved contribution of phonons to temperature and heat flux is written to the output files, thus allowing the study of cumulative thermal conductivity as a function of phonon frequency or mean free path. We provide several illustrative examples, including ballistic and quasi-ballistic thermal transport, the thermal conductivity of thin films and periodic nanostructures, to demonstrate the functionality and to benchmark our code against available theoretical/analytical/computational results from the literature. Moreover, we parallelize the code using the Matlab Distributed Computing Server, providing near-linear scaling with the number of processors.
Homepage: https://www.sciencedirect.com/science/article/abs/pii/S0010465521001156
Source Code:  https://github.com/abhipath90/MCBTE
Dependencies: Matlab
Keywords: linearized Boltzmann transport equation; phonon transport; thermal conductivity
Related Software: Phonon-Code; almaBTE; Matlab
Cited in: 2 Documents