Numerical study of an impulse wave generated by a sliding mass

© 2018 WIT PressIn this work, a numerical framework for the direct numerical simulation of tsunami waves generated by landslide events is proposed. The method, implemented on the TermoFluids numerical platform, adopts a free surface model for the simulation of momentum equations; thus, considering the effect of air on the flow physics negligible. The effect of the solid motion on the flow is taken into account by means of a direct forcing immersed boundary method (IBM). The method is available for 3-D unstructured meshes; however, it can be integrated with an adaptive mesh refinement (AMR) tool to dynamically increase the local definition of the mesh in the vicinity of the interfaces, which separate the phases or in the presence of vortical structures. The method is firstly validated by simulating the entrance of objects into still water surfaces for 2-D and 3-D configurations. Next, the case of tsunami generation from a subaerial landslide is studied and the results are validated by comparison to experimental and numerical measurements. Overall, the model demonstrates its efficiency in the simulation of this type of physics, and a wide versatility in the choice of the domain discretization.Peer ReviewedPostprint (published version

Numerical simulations of conjugate convection combined with surface thermal radiation using an Immersed-Boundary Method

Published under licence in Journal of Physics: Conference Series by IOP Publishing Ltd. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.Dynamic and thermal interaction problems involving fluids and solids were studied through a finite volume based Navier-Stokes solver, combined with immersed-boundary techniques and the net radiation method. Source terms were included in the momentum and energy equations to enforce the non-slip condition and the conjugate boundary condition including the radiative heat exchange. Code validation was performed through the simulation of two cases from the literature: conjugate natural convection in a square cavity with a conducting side wall; and a cubical cavity with conducting walls and a heat source. The accuracy of the methodology and the validation of the inclusion of moving bodies into the simulation was performed via a theoretical case.Peer Reviewe

Numerical simulations of conjugate convection combined with surface thermal radiation using an Immersed-Boundary Method

Published under licence in Journal of Physics: Conference Series by IOP Publishing Ltd. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.Dynamic and thermal interaction problems involving fluids and solids were studied through a finite volume based Navier-Stokes solver, combined with immersed-boundary techniques and the net radiation method. Source terms were included in the momentum and energy equations to enforce the non-slip condition and the conjugate boundary condition including the radiative heat exchange. Code validation was performed through the simulation of two cases from the literature: conjugate natural convection in a square cavity with a conducting side wall; and a cubical cavity with conducting walls and a heat source. The accuracy of the methodology and the validation of the inclusion of moving bodies into the simulation was performed via a theoretical case.Peer Reviewe

On the fast transient spoiler deployment in a NACA0012 profile using LES techniques combined with AMR and IMB methods

Peer ReviewedPostprint (author's final draft

Numerical study of an impulse wave generated by a sliding mass

© 2018 WIT PressIn this work, a numerical framework for the direct numerical simulation of tsunami waves generated by landslide events is proposed. The method, implemented on the TermoFluids numerical platform, adopts a free surface model for the simulation of momentum equations; thus, considering the effect of air on the flow physics negligible. The effect of the solid motion on the flow is taken into account by means of a direct forcing immersed boundary method (IBM). The method is available for 3-D unstructured meshes; however, it can be integrated with an adaptive mesh refinement (AMR) tool to dynamically increase the local definition of the mesh in the vicinity of the interfaces, which separate the phases or in the presence of vortical structures. The method is firstly validated by simulating the entrance of objects into still water surfaces for 2-D and 3-D configurations. Next, the case of tsunami generation from a subaerial landslide is studied and the results are validated by comparison to experimental and numerical measurements. Overall, the model demonstrates its efficiency in the simulation of this type of physics, and a wide versatility in the choice of the domain discretization.Peer Reviewe

On the IBM approximation for the wheel aerodynamic simulation

Challenging large eddy simulations (CLES) are performed to the flow around simplified wheels in wheelhouses. Wheel geometry is modelled using immersed boundary methods. Results are compared to previous numerical simulations. Instantaneous flows results and turbulent structures are analysed to asses the viability of this boundary treatment on the resolution of a rotating wheel.Peer ReviewedPostprint (published version

On the IBM approximation for the wheel aerodynamic simulation

Challenging large eddy simulations (CLES) are performed to the flow around simplified wheels in wheelhouses. Wheel geometry is modelled using immersed boundary methods. Results are compared to previous numerical simulations. Instantaneous flows results and turbulent structures are analysed to asses the viability of this boundary treatment on the resolution of a rotating wheel.Peer Reviewe

On the fast transient spoiler deployment in a NACA0012 profile using LES techniques combined with AMR and IMB methods

Peer Reviewe