期刊
EUROPHYSICS LETTERS
卷 71, 期 3, 页码 473-479出版社
EDP SCIENCES S A
DOI: 10.1209/epl/i2004-10542-5
关键词
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资金
- Engineering and Physical Sciences Research Council [GR/S10377/01] Funding Source: researchfish
The lattice Boltzmann algorithm efficiently simulates the Navier-Stokes equation of isothermal fluid flow, but ignores thermal fluctuations of the fluid, important in mesoscopic flows. We show how to adapt the algorithm to include noise, satisfying a fluctuation-dissipation theorem (FDT) directly at lattice level: this gives correct fluctuations for mass and momentum densities, and for stresses, at all wave vectors k. Unlike previous work, which recovers FDT only as k --> 0, our algorithm offers full statistical mechanical consistency in mesoscale simulations of, e.g., fluctuating colloidal hydrodynamics.
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