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Fantom3D

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Japanese ver.

Tetsuya Shintani

Fantom3D is an object-oriented numerical code (C++) for analyzing fluid flows, especially for environmental fluid dynamics.

Major features:

• 3D flow, as well as 1D and 2D flows
• Nonhydrostatic and hydrostatic
• Implicit surface and vertical diffusion treatments (theta method, 2nd order in time)
• Adams-bashforth method for time integration (2nd order)
• Generalized coordinate
• Domain decomposition
• Parallelization (OpenMP)
• ULTIMATE-QUICKEST scheme for advective terms
• Nesting (1-way), Multiple grid resolutions
• Multi-Phase flow
• Multi-Platform: MS-Windows, Linux and MacOSX (both 32 & 64-bit versions)
• NetCDF output (Linux and MacOSX)
• Simple GUI (Qt and VTK)
• Wet and dry treatment
• Partial step representation
• Parallelized Residual cutting method
• Script language Lua is embedded with SWIG

Paper, describing Fantom3D by Shintani and Nakayama 2009 (in Japanese)

Examples:

• Double diffusive convection (over stable)
• K-H instability (high resolution)
• Lock exchanging flow (high resolution, 17MB)
• Thermal plume
• Internal wave breaking
• Wet and dry with partial cell
• K-H instability
• Ogochi Reservoir
• Analysis of Lake Abashiri, surface velocity and iso-surface of salinity (17 ppt)
• Convective instability (density difference = 20kg/m^3, high viscosity, using 4 domains)
• Convective instability (density difference = 20kg/m^3, low viscosity, using 8 domains)
• Comuputed surface displacement and velocity (Lake Abashiri)
• Particle tracer tracking (Lake Abashiri)
• Tokyo Bay (Collaboration with Kitami-IT, 37MB)
• Lock-exchanging flow with mixed-grid resolutions

Fantom 2021 for Lin et al., Influence of thermal stratification on seasonal net ecosystem production and dissolved inorganic carbon in a shallow subtropical lake, Journal of Geophysical Research: Biogeosciences, 2021

Fantom 2020 for Nakayama et al., Breaking of internal Kelvin wave shoaling on a slope, Journal of Geophysical Research: Oceans, 2020

Fantom 2020 for Nakayama et al., Integration of submerged aquatic vegetation motion within hydrodynamic models, Water Resources Research, 2020

Fantom 2019 for Nakayama et al., Classification of internal solitary wave breaking over a slope, Physical Review Fluids, 2019

Fantom 2016 for Nakayama et al.,Reversal of secondary circulations in a sharp channel bend, Coastal Engineering Journal, 2016

Fantom 2014 for Nakayama et al., Horizontal and residual circulations driven by wind stress curl in Tokyo Bay, Journal of Geophysical Research: Oceans, 2014

Department of Civil and Environmental Engineering

Tokyo Metropolitan University

1-1 Minamiohsawa, Hachioji, Tokyo 192-0397, Japan