Computational technology of multiscale modeling the gas flows in microchannels

11th International Conference on "Mesh methods for boundary-value problems and applications"

Podryga, V.O.^1

Keldysh Institute of Applied Mathematics of Russian Academy of Sciences, Miusskaya sq. 4, Moscow

125047, Russia^1

关键词: Computational domains;    Computational technology;    External influences;    Microscopic models;    Molecular dynamics methods;    Multi-scale approaches;    Multi-scale Modeling;    Newton's equations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/158/1/012078/pdf
DOI  :  10.1088/1757-899X/158/1/012078

来源: IOP

【 摘 要 】

The work is devoted to modeling the gas mixture flows in engineering microchannels under conditions of many scales of computational domain. The computational technology of using the multiscale approach combining macro - and microscopic models is presented. At macrolevel the nature of the flow and the external influence on it are considered. As a model the system of quasigasdynamic equations is selected. At microlevel the correction of gasdynamic parameters and the determination of boundary conditions are made. As a numerical model the Newton's equations and the molecular dynamics method are selected. Different algorithm types used for implementation of multiscale modeling are considered. The results of the model problems for separate stages are given.