SHADOWFAX: a public moving-mesh code

Bert Vandenbroucke @drvandenbroucke, bert.vandenbroucke@ugent.be

Ghent University

Background

GADGET2, Springel (2005)

Agertz et al. (2007)

AREPO, Springel (2010)

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Algorithm

Voronoi mesh

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Algorithm

Hydrodynamics =

Flux exchange

Flux estimated at faces using solution to Riemann problem

𝜌, 𝑣 , 𝑃 𝑚, 𝑝 , 𝐸 𝑉

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Toro, E. F. (2009)

Algorithm Spherical overdensity

2D 10,000 cells

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SHADOWFAX vs SPH Sod shock

3D 1,024,128 cells/particles

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SHADOWFAX vs SPH Evrard collapse

3D 16,599 cells/particles

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SHADOWFAX vs GIZMO Sod shock

3D 1,024,128 cells/particles

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SHADOWFAX vs AMR Shearing layers

No bulk velocity

High bulk velocity

2D 160,000 cells

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Scaling Strong scaling

Weak scaling

Memory usage

Run time fractions

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Grid

Outlook

SWIFT

Tree-based

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Outlook

Sub-grid physics: • Cooling/heating • Star formation • Stellar feedback • …

Van Den Bossche, Y., master’s thesis

De Rijcke, S. et al. (2013)

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https://github.com/AstroUGent/shadowfax

ascl:1605.003

Vandenbroucke & De Rijcke (2016)

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http://www.dwarfs.ugent.be/shadowfax

#shadowfax

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