Smooth particle hydrodynamics: importance of correction terms in adaptive resolution algorithms

Alimi, Jean‐Michel; Serna, A.; Pastor, C.; Bernabeu, Guillermo

doi:10.1016/s0021-9991(03)00351-6

Cited by 17 publications

(16 citation statements)

References 36 publications

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“…Thus, the smoothing length h is initially distributed so that its values are small in the desired accurate area and bigger elsewhere, leading to a method quite equivalent to local refinement/stretching commonly used in mesh-based Navier-Stokes solvers. Formally, these features imply some additional terms involvingrh and dh dt in the previous formulation [11][12][13] aiming at satisfying conservation requirements.…”

Section: Variable Smoothing Lengthmentioning

confidence: 99%

Two-dimensional SPH simulations of wedge water entries

Oger

Döring

Alessandrini

et al. 2006

Journal of Computational Physics

328

134

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Section: Variable Smoothing Lengthmentioning

confidence: 99%

Two-dimensional SPH simulations of wedge water entries

Oger

Döring

Alessandrini

et al. 2006

Journal of Computational Physics

328

134

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“…While allowing a critical step forward with a large set of simulations, the excellence of the treeAsph code used in this work was somewhat diminished by its serial numerical structure (Serna et al 1996;Alimi et al 2003), hampering the possibility of high resolution simulations, which require large amounts of computing time.…”

Section: Introductionmentioning

confidence: 99%

The dynamical and chemical evolution of dwarf spheroidal galaxies with GEAR

Revaz

Jablonka

2012

A&A

134

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We present the fully parallel chemo-dynamical Tree/SPH code GEAR, which allows us to perform high resolution simulations with detailed chemical diagnostics. Starting from the public version of Gadget-2, we included the complex treatment of the baryon physics: gas cooling, star formation law, chemical evolution, and supernova feedback. We qualified the performances of GEAR in the case of dwarf spheroidal galaxies (dSphs) galaxies. Our code GEAR conserves the total energy budget of the systems to better than 5% over 14 Gyr and provides an excellent convergence of the results with numerical resolution. We showed that models of dSphs in a static Euclidean space, where the expansion of the universe is neglected are valid. In addition, we tackled some existing open questions in the field, such as the stellar mass fraction of dSphs and its link to the predicted dark matter halo mass function, the effect of supernova feedback, the spatial distribution of the stellar populations, and the origin of the diversity in star formation histories and chemical abundance patterns. Strong supernova-driven winds seem incompatible with the observed metallicities and luminosities. Despite newly formed stars being preferentially found in the galaxy central parts, turbulent motions in the gas can quickly erase any metallicity gradient. The diversity in properties of dSph are related to a range of total masses, as well as a range of dispersion in the central densities, which is also seen in the halos emerging from a ΛCDM cosmogony.

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“…in the context of fluid–structure interaction problems. In recent years, different variable resolution schemes aiming to improve the accuracy and numerical efficiency of SPH have been proposed . However, to the authors' best knowledge, no such algorithm has been presented before for truly ISPH.…”

Section: Splitting Algorithm and Numerical Implementationmentioning

confidence: 99%

Dynamic flow‐based particle splitting in smoothed particle hydrodynamics

Khorasanizade

Sousa

2015

Numerical Meth Engineering

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Summary In this work, a dynamic procedure for local particle refinement to be used in smoothed particle hydrodynamics (SPH) is presented. The algorithm is able to consistently produce successive levels of particle splitting in accordance to a flow‐based criterion. It has been applied together with accurate and robust formulations for variable spatial resolution in the framework of a semi‐implicit, truly incompressible scheme for SPH. Different test cases have been considered to assess the capabilities and advantages of the proposed procedure, namely, the laminar flow around circular and square obstacles in a plane channel for various regimes. Such flow cases entail the simulation of attached and separated shear layers, recirculating flow, vortex shedding and surface discontinuities. The results obtained for two levels of particle splitting have demonstrated that significant improvements may be obtained with respect to uniform particle spacing solutions in a variety of situations, thus presenting an excellent trade‐off between accuracy and computational cost. Copyright © 2015 John Wiley & Sons, Ltd.

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Smooth particle hydrodynamics: importance of correction terms in adaptive resolution algorithms

Cited by 17 publications

References 36 publications

Two-dimensional SPH simulations of wedge water entries

Two-dimensional SPH simulations of wedge water entries

The dynamical and chemical evolution of dwarf spheroidal galaxies with GEAR

Dynamic flow‐based particle splitting in smoothed particle hydrodynamics

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