YALES2 Gallery

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Combustion

PRECCINSTA Burner (Vincent Moureau)

Direct Numerical Simulation of an aeronautical burner [1]. The mesh features 2.6 billion tetrahedrons and a resolution of 100 microns.

PRECCINSTA burner with YALES2
Iso-surface of the Q criterion for the isothermal case
Temperature field for the fully premixed reacting case
OH radical field for the fully premixed reacting case
Couverture du Numéro Spécial Calcul Intensif des Comptes Rendus de Mécanique de l'académie des sciences

KIAI burner (Vincent Moureau)

Large-Eddy Simulations of a swirl burner designed and operated at CORIA (J.P. Frenillot, G. Cabot, B. Renou, M. Boukhalfa).

KIAI burner with YALES2
Velocity field for the cold flow - 382M tetrahedrons
Q-criterion for the cold flow - 382M tetrahedrons

Aerodynamics

Formula One (David Taieb, Guillaume Ribert & Vincent Moureau)

Computation of a Formula 1 meeting with the 2010 regulations.

The design is based on the 2008 car which was simulated with the Fluent software with less than one million cells. The new car has the main features observed during the early part of F1 season, like the coca bottle shaped sidepods, the double-deck diffuser, the outer mirror disposition (forbidden by the FIA in the second part of the season), the three elements front wing.

The body of the car is discretized with 6.5mm element leading to 36 M cells in the computational domain.

Formula One with YALES2
Formula 1 with 36 Million cells - Streamlines
Formula 1 with 36 Million cells - Iso-Q criterion

Interaction between two Le Mans Series prototypes (David Taieb, Guillaume Ribert & Vincent Moureau)

Interaction between two Le Mans Series prototypes with YALES2
Instantaneous streamlines colored by velocity RMS.
centerContour of pressure on the upper bodywork.
Streamlines of averaged velocity colored by velocity RMS.
Longitudinal slice of instantaneous velocity and downforce on bodies.

Heat transfers

T7.2 Blade (Nicolas Maheu)

Large-Eddy Simulation of heat exchanges on a turbine blade.

T7.2 blade with YALES2
T7.2 Blade - Iso-Q criterion - 240M tetrahedrons
T7.2 Blade - Iso-T 325K - 240M tetrahedrons

Two-phase flows

Triple disk injector (Vincent Moureau)

Computation of a Triple Disk injector (Grout et al 2007). The densities and viscosities are those of water and air at atmospheric pressure and temperature. The video on the left was performed with 203 million tets and the one on the right with 1.6 billion tets with a resolution of 2.5 microns.

Primary atomization with YALES2

Pouring flow (Vincent Moureau and Olivier Desjardins)

Sample computation of a 2D two-phase flow with realistic properties for air and water to highlight the robustness of the method developed by Desjardins and Moureau at the 2010 CTR Summer Program.

Primary atomization with YALES2

Splashing (Vincent Moureau)

2D computation with YALES2 of a Lagrangian spray splashing on a wall and forming a film modeled with a level set and the Ghost Fluid Method. The grey particles and the grey film have the properties of water and the color represents the velocity magnitude in the gas. The Lagrangian particle are one-way coupled to the gas through drag for sake of simplicity.

Wall splashing with YALES2

Bio-mechanics from I3M lab in Montpellier

Simulation of a cardiac cycle (Christophe Chnafa, Simon Mendez, Franck Nicoud)

3D computation of a cardiac cycle with the arbitrary-Lagrangian Eulerian solver of YALES2. This solver and the calculations were done in the I3M lab of the University of Montpellier by C. Chnafa, S. Mendez and F. Nicoud. The color in the movie represents the vorticity.

Cardiac cycle with YALES2


Advanced numerics

Immersed boundaries on unstructured grids (Vincent Moureau)

2D computation with YALES2 of the flow around two moving cylinders with an immersed boundary technique implemented for unstructured grids. The color represents the velocity magnitude.

Immersed boundaries with YALES2

Mesh deformation (Vincent Moureau)

Demonstration of 2D mesh deformation with YALES2. Only the velocity of boundaries is prescribed and the movement of the nodes is found by inverting an elliptic system. Edge swapping is also activated in this example.

Mesh deformation with YALES2