Modeling Uncertainty in Quasi-Hydrostatic Isothermal Self-Gravitating Slab

Details Modeling Uncertainty in Quasi-Hydrostatic Isothermal Self-Gravitating Slab Modeling Uncertainty in Quasi-Hydrostatic Isothermal Self-Gravitating Slab

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jkas...40...29n&link_type=abstract

Journal of the Korean Astronomical Society, vol. 40, no. 1, pp.29-36

Other

Hydrodynamics, Methods: Numerical, Ism: Evolution

Scientific paper

The smoothed particle hydrodynamics~(SPH) method is applied to construct the dispersion of fluctuations in quasi-hydrostatic configuration of an isothermal self-gravitating slab. The uncertainty of the implementation is evaluated, and a novel technique (acceleration error) is proposed to weaken this uncertainty. The two-fluid quasi-hydrostatic diffusion of small fluctuations is used to support the importance of the acceleration error. The results show that the uncertainty converges to a few percent by increasing of the SPH particle numbers. Considering the acceleration error weakens the uncertainty, and prohibits the serious dynamical consequences in slow dispersion of fluctuation in the quasi-hydrostatic evolution of the slab.

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