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The focus of my research is the numerical simulation of coupled problems in different fields of Science and Engineering, including Marine, Civil, Nuclear and Geotechnical Engineering.
Depending on the application and the involved materials, I use (and eventually couple) different numerical methods. I have mainly worked with the Finite Element Method (FEM) and the Particle Finite Element Method (PFEM) to solve fluid-structure interaction and thermal coupled problems. However, recently, I have also worked with the Discrete Element Method (DEM) in combination with the PFEM for the simulation of particle-laden flows with free-surface.
Here below you can find an overview of the type of problems I have studied in my research.
FREE-SURFACE FLUIDS
WaterLandslideAndTsunamiWave_h060m.MP4Tsunami wave generated by water landslide
A water landslide generates a tsunami wave in a 35m-long water reservoir. Water is modeled with the PFEM.
[Published in Mulligan et al., JGR Oceans, 2020]
TakeShallowLateralBis.mp4The same landslide-generated wave as above is here modeled with a one-way coupled Lagrangian PFEM (Navier-Stokes) - Eulerian FEM (Shallow-Water) method.
[Published in Maso et al., AMOS, 2022]
FLUID-STRUCTURE INTERACTION
damBreakFSI.MP4Collapse of a water column and impact over an elastic membrane
Water is modeled with the PFEM. Structure in modeled with hypoelastic FEM.
[Published in Franci et al., CMAME, 2016]
elasticContainerVelocity.MP4Filling of an elastic container with a viscous fluid
The fluid is modeled with a Newtonian PFEM. Structure in modeled with hypoelastic FEM.
[Published in Franci., CPM, 2020]
PFEMfractureFront _cropped.mp4Impact of a tsunami wave against a concrete wall. Front view.
PFEMfractureLateral_cropped.mp4Impact of a tsunami wave against a concrete wall. Lateral view.
The propagating wave is modelled with the PFEM and a FEM-DEM method is used for modelling the collapsing concrete structure [Published in Oñate et al. 2022]
NON-NEWTONIAN FLUIDS
AbramConeSlumpTest.aviAbram slump test
The fresh concrete is modeled with the PFEM and using a regularized Bingham model (Papanastasiou's regularization).
[Published in Franci et al., JNNFM, 2018]
LANDSLIDES SIMULATION
Vajont_Complete_100s_frontView.MP4Vajont disaster (1963) simulation. Front View.
Vajont_Complete_100s_topView.MP4Vajont disaster (1963) simulation. Top View.
[Published in Franci et al., Eng Geo, 2020]
shallowLateral.mp4Landslide-generated wave in a representative Alpine lake
The multi-natural hazard scenario is modeled with a one-way coupled Lagrangian PFEM (Navier-Stokes) - Eulerian FEM (Shallow-Water) method. The 3D PFEM is used for the near-field simulation (landslide runout and impact zone) and the Shallow-Water FEM is used for the far field (wave propagation).
[Published in Maso et al., AMOS, 2022]
GRANULAR FLOWS
MuI_22slopedPlane.MP4Flow of a dense granular mass over a slope
The granular material is modeled with the PFEM and using a regularized model of the so-called μ(I)-rheology.
[Published in Franci et al., JCP, 2019]
PARTICULATE FLOWS WITH FREE-SURFACE
VaciadoRho1_3Dview.MP4Discharge of a tank filled with water and solid particles
The PFEM is used for water modeling, while the cloud of spherical particles (with the same density as water) is modeled with the DEM.
[Published in Franci et al., CPM, 2019]
rotatorDrum3D.MP4rotatorDrumXY.MP4Rotator drum
The solid particles are modeled with the Discrete Element Method (DEM), while water is modeled with the PFEM and a Newtonian law.
[Presented at COUPLED 2019, Sitges, Spain]
FoodMixing.MP4Qualitative simulation of Stracciatella ice-cream mixing
Stracciatella is modeled with a Bingham model and PFEM and chocolate blocks are modeled with the DEM. Thermal effects are not taken into account.
[Presented at COUPLED 2019, Sitges, Spain]
SphereDEMFEMintoPFM.MP4PFEM-FEM-DEM coupled problem
The solid sphere is modeled with FEM, the fluid with PFEM and the solid spherical particles with DEM.
[Presented at PARTICLES 2017, Hannover, Germany]
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