Multiphase smoothed-particle hydrodynamics

By B. Ritchie, P. Thomas. 2000

176 citations recorded by the source corpus.

We adapt the smoothed-particle hydrodynamics (SPH) technique to allow a multiphase fluid in which SPH particles of widely differing density may be freely intermixed. Applications include modelling of galaxy formation and cooling flows.

Subfields: Computational Mechanics, Ocean Engineering

View Paper: https://www.semanticscholar.org/paper/6f62c063fc12afd20cd3b79e383795157e0b9457

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Computational Mechanics

In Ocean Engineering

Citations in the corpus

Physical Models of Galaxy Formation in a Cosmological Framework (2014, methodology): “A different approach was pursued by Saitoh & Makino (2013), following on Ritchie & Thomas (2001).”
A multi-phase SPH method for macroscopic and mesoscopic flows (2006, methodology): “As a remedy, Richie and Thomas (2001) suggest a summation of the particle-averaged pressure, not density, to handle large density gradients.”
Gasoline2: a modern smoothed particle hydrodynamics code (2017, methodology): “Some of the issues raised were already known and SPH variants were proposed to address them (e.g. Ritchie & Thomas 2001), but were not widely adopted.”
NIHAO project – I. Reproducing the inefficiency of galaxy formation across cosmic time with a large sample of cosmological hydrodynamical simulations (2015, methodology): “Ritchie & Thomas (2001) also proposed modifying the density calculation to use equal pressures, but we do not use those densities in the simulations described here.”
A new class of accurate, mesh-free hydrodynamic simulation methods (2014, methodology): “…suppression of fluid mixing comes from a “surface-tension”-like error at contact discontinuities and free surfaces, which can be eliminated by kernel-smoothing all quantities (e.g. pressure), not just density, in the equations of motion (Ritchie & Thomas 2001; Saitoh & Makino 2013; Hopkins 2013).”
The EAGLE project: Simulating the evolution and assembly of galaxies and their environments (2014, methodology): “Several solutions have been suggested in order to smooth the pressure at contact discontinuities (e.g. Ritchie & Thomas 2001; Price 2008; Read et al. 2010; Saitoh & Makino 2013; Hopkins 2013), and to reduce the artificial viscosity away from shocks (e.g. Morris & Monaghan 1997; Cullen & Dehnen…”
The Romulus cosmological simulations: a physical approach to the formation, dynamics and accretion models of SMBHs (2016, methodology): “The SPH implementation includes thermal diffusion (Shen et al. 2010) and eliminates artificial gas surface tension through the use of a geometric mean density in the SPH force expression (Ritchie & Thomas 2001; Menon et al. 2015; Governato et al. 2015).”
The EAGLE simulations of galaxy formation: calibration of subgrid physics and model variations (2015, background): “…has proven to be a nontrivial challenge, leading to the identification and rectification of many shortcomings of numerical techniques (e.g. Sommer-Larsen, Gelato & Vedel 1999; Ritchie & Thomas 2001; Marri & White 2003; Okamoto et al. 2003; Agertz et al. 2007; Springel 2010; Hopkins 2013, 2014).”
Astrophysical smooth particle hydrodynamics (2009, background): “This can reduce numerical noise in regions of large density contrasts where particles of very different masses interact (Ritchie and Thomas, 2001).”
Where Are the Baryons? II. Feedback Effects (2005, background): “…progress has been made recently to provide a better treatment of the multiphase interstellar medium (Yepes et al. 1997; Elizondo et al. 1999a, 1999b; Hultman & Pharasyn 1999; Ritchie & Thomas 2001; Springel & Hernquist 2003), but the generation of GSWs is far from being adequately modeled.”
Moving mesh cosmology: the hydrodynamics of galaxy formation (2011, background): “…ways, for example by invoking a time-dependent artificial viscosity (Morris & Monaghan 1997; Dolag et al. 2005), a modified density estimate (e.g. Ritchie & Thomas 2001; Heß & Springel 2010; Saitoh & Makino 2012), a decoupling of the hot and cold neighbours in multiphase flows (Marri & White…”
The EAGLE simulations of galaxy formation: the importance of the hydrodynamics scheme (2015, methodology): “The equations of motion used in the ANARCHY flavour of SPH are based on the Pressure-Entropy formulation of Hopkins (2013), a generalisation of the earlier solutions of Ritchie & Thomas (2001), Read et al. (2010), Abel (2011) and Saitoh & Makino (2013).”
Smoothed Particle Hydrodynamics in Astrophysics (2010, background): “This led Ritchie & Thomas (2001) to suggest a modified density estimate specifically designed towork better across contact discontinuities.”
NIHAO – IV: core creation and destruction in dark matter density profiles across cosmic time (2015, background): “Most important is the Ritchie & Thomas (2001) force expression that improves mixing and shortens the destruction time for cold blobs (see Agertz et al. 2007).”
A DENSITY-INDEPENDENT FORMULATION OF SMOOTHED PARTICLE HYDRODYNAMICS (2012, methodology): “On the other hand, our new SPH shows a very good result which is comparable to those with Euler codes and with SPH with the Ritchie & Thomas (2001) equation of motion or the artificial conductivity (see Price 2008).”
Fundamental differences between SPH and grid methods (2006, methodology): “Solutions to this problem has been attempted by several authors (e.g. Ritchie & Thomas 2001; Marri & White 2003) by reformulating SPH to more accurately treat the particle interactions at steep boundaries.”
FIRE-2 simulations: physics versus numerics in galaxy formation (2017, background): “…includes areas where SPH has had historical difficulty, including sharp shock-capturing, fluid-mixing instabilities, magneto-rotational instabilities, and anisotropic diffusion (Ritchie & Thomas 2001; Agertz et al. 2007; Price 2008; Wadsley et al. 2008; Read & Hayfield 2012; Saitoh & Makino 2013).”
A general class of Lagrangian smoothed particle hydrodynamics methods and implications for fluid mixing problems (2012, methodology): “A variety of “flavors” (alternative formulations of the EOM or kernel estimators) of SPH have been proposed which remedy this (see above and Monaghan 1997; Ritchie & Thomas 2001; Price 2008; Wadsley et al. 2008; Read et al. 2010; Read & Hayfield 2012; Abel 2011; García-Senz et al. 2012).”
Modelling discontinuities and Kelvin-Helmholtz instabilities in SPH (2007, background): “The specific problems pointed out by Agertz et al. (2007) are shown to be related in particular to the (lack of) treatment of contact discontinuities in standard SPH formulations which can be cured by the simple application of an artificial thermal conductivity term.”