Steady state simulation method and device for phonon heat transport

Abstract

The invention relates to a steady-state simulation method and device for phonon heat transport, computer equipment and a storage medium. The method comprises the following steps: acquiring a first initial value group of phonon intensity and a first initial value group of phonon pseudo-intensity; obtaining a plurality of different space coordinate points according to the steady-state simulation size and the space step length; calculating through a Boltzmann equation and an interface condition formula of the corresponding steady-state phonons to obtain a first intensity value group of the phonons under different space coordinate points; according to the first intensity value group of the phonons, a first equilibrium temperature value group, a first pseudo-equilibrium temperature value group and a first heat flow value group of corresponding steady-state simulation are obtained; and when the relative error of the heat flow value groups of the steady-state simulation obtained by two adjacent iterative calculations meets a preset condition, outputting a first equilibrium temperature value group, a first pseudo-equilibrium temperature value group and a first heat flow value group of the current steady-state simulation, and ending the steady-state simulation. By adopting the method, the heat transport process of phonons changing along with the space can be simulated more accurately.

Description

technical field [0001] The present application relates to the technical field of phonon heat transport in semiconductors, in particular to a steady-state simulation method, device, computer equipment and storage medium for phonon heat transport. Background technique [0002] With the development of semiconductor technology, the research on the heat transport mechanism of phonons in semiconductors can provide effective guidance for the heat dissipation optimization design of electronic devices. There are many research methods on the heat transport mechanism of phonons, and the discrete coordinate method as a The numerical method to directly solve the phonon Boltzmann equation is an important tool for the study of phonon thermal transport in semiconductors. [0003] The phonon discrete coordinate method considering the actual dispersion relationship is mainly divided into two categories: the numerical algorithm based on small temperature difference and the numerical algorithm ...

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Problems solved by technology

[0004] Here, we are studying the process of phonon heat transport based on any temperature difference and in a steady state. In the process of simulating phonon heat transport using the discrete coordinate method, the problem of the interface needs to be considered. Since the simulation system The difference in materials on both sides of the middle interface also has a certain impact on the simulation results. However, the current staff does not take the interface into account during the simulation process, which leads to inaccurate simulation results.

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