An arbitrary Lagrangian–Eulerian formulation for the numerical simulation of flow patterns generated by the hydromedusa Aequorea victoria

2009 ◽  
Vol 228 (12) ◽  
pp. 4588-4605 ◽  
Author(s):  
Mehmet Sahin ◽  
Kamran Mohseni
Keyword(s):  
Numerical Simulation ◽  
Flow Patterns ◽  
Arbitrary Lagrangian Eulerian ◽  
Aequorea Victoria ◽  
Eulerian Formulation

Finite Element and Experimental Analyses of an Armoured Vehicle Subjected to Landmine Blast

2015 ◽  
Vol 65 (6) ◽  
pp. 477 ◽  
Author(s):  
Atıl Erdik ◽  
Vahdet Ucar ◽  
Namik Kilic
Keyword(s):  
Numerical Simulation ◽  
Field Test ◽  
Free Field ◽  
Time History ◽  
Full Scale ◽  
Arbitrary Lagrangian Eulerian ◽  
Eulerian Formulation ◽  
Scale Field ◽  
Blast Parameters ◽  
Simulation Results

Landmines severely threaten the armoured vehicles. The principal objective is to present a methodology for blast simulations of vehicles subjected to landmine explosions. First, free field blast experiment of 2 kg TNT charge in a steel pot is carried out to validate the blast parameters used in the numerical simulation. Overpressure-time history collected in the free field blast experiment is compared to the numerical simulation results. Numerical simulations are performed in LS-DYNA hydrocode that employs Arbitrary Lagrangian Eulerian formulation enabling a fully coupled interaction between the blast wave, the detonation gases, and the vehicle. Second, the full-scale field test of an armoured vehicle exposed to 6 kg of TNT charge in a steel pot underneath the rear end of the vehicle is conducted. Maximum dynamic deformations measured inside the vehicle are compared to the results calculated in the numerical simulation. Results show that the numerical simulation is in good agreement with the full-scale field test.

scholarly journals A Well-Balanced SPH-ALE Scheme for Shallow Water Applications

2021 ◽  
Vol 88 (3) ◽  
Author(s):  
Alberto Prieto-Arranz ◽  
Luis Ramírez ◽  
Iván Couceiro ◽  
Ignasi Colominas ◽  
Xesús Nogueira
Keyword(s):  
Shallow Water ◽  
Source Term ◽  
Arbitrary Lagrangian Eulerian ◽  
Flat Bottom ◽  
Riemann Solvers ◽  
Eulerian Formulation ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Numerical Fluxes ◽  
And Behavior

AbstractIn this work, a new discretization of the source term of the shallow water equations with non-flat bottom geometry is proposed to obtain a well-balanced scheme. A Smoothed Particle Hydrodynamics Arbitrary Lagrangian-Eulerian formulation based on Riemann solvers is presented to solve the SWE. Moving-Least Squares approximations are used to compute high-order reconstructions of the numerical fluxes and, stability is achieved using the a posteriori MOOD paradigm. Several benchmark 1D and 2D numerical problems are considered to test and validate the properties and behavior of the presented schemes.

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