Frequency-domain Monte Carlo method for linear oscillatory gas flows
| Autor: | Daniel R. Ladiges, John E. Sader |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Physics
Numerical Analysis Physics and Astronomy (miscellaneous) Applied Mathematics Monte Carlo method Computer Science Applications Physics::Fluid Dynamics Hybrid Monte Carlo Computational Mathematics Modeling and Simulation Dynamic Monte Carlo method Monte Carlo integration Monte Carlo method in statistical physics Quasi-Monte Carlo method Statistical physics Direct simulation Monte Carlo Monte Carlo molecular modeling |
| Zdroj: | Journal of Computational Physics. 284:351-366 |
| ISSN: | 0021-9991 |
| DOI: | 10.1016/j.jcp.2014.12.036 |
| Popis: | Gas flows generated by resonating nanoscale devices inherently occur in the non-continuum, low Mach number regime. Numerical simulations of such flows using the standard direct simulation Monte Carlo (DSMC) method are hindered by high statistical noise, which has motivated the development of several alternate Monte Carlo methods for low Mach number flows. Here, we present a frequency-domain low Mach number Monte Carlo method based on the Boltzmann-BGK equation, for the simulation of oscillatory gas flows. This circumvents the need for temporal simulations, as is currently required, and provides direct access to both amplitude and phase information using a pseudo-steady algorithm. The proposed method is validated for oscillatory Couette flow and the flow generated by an oscillating sphere. Good agreement is found with an existing time-domain method and accurate numerical solutions of the Boltzmann-BGK equation. Analysis of these simulations using a rigorous statistical approach shows that the frequency-domain method provides a significant improvement in computational speed. |
| Databáze: | OpenAIRE |
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