Essays about: "shock-wave"

Showing result 1 - 5 of 13 essays containing the word shock-wave.

1. 1. Structural responses due to underwater detonations : Validation of explosion modelling methods using LS-DYNA

   University essay from Linköpings universitet/Mekanik och hållfasthetslära

   Author : Gustav Blomgren; Ebba Carlsson; [2023]
   Keywords : Underwater explosion; UNDEX; detonation; fluid structure interaction; FSI; SSA; S-ALE; shock-wave; explosive; PETN; explosive modelling; Sub-Sea Analysis; Structured ALE; Arbitrary Lagrangian Euler; Multi Material Arbitrary Lagrangian Euler; MMALE; LS-DYNA;

   Abstract : Modelling the full event of an underwater explosion (UNDEX) is complex and requires advanced modelling methods in order to achieve accurate responses. The process of an UNDEX includes a series of events that has to be considered. READ MORE

3. 2. Petrography of impactites from the Dellen impact structure, Sweden

   University essay from Lunds universitet/Geologiska institutionen

   Author : Robert Mroczek; [2023]
   Keywords : Dellen; Impact; structure; magnetite; apatite; shock waves; shock-metamorphic; features; Impactite; petrography; scanning electron microscope; SEM; geology; Earth and Environmental Sciences;

   Abstract : Identification and characterization of shock-metamorphic features in hypervelocity impact craters is important for our understanding of how shock waves interact with geologic materials and how impact craters form, which in turn is essential to our understanding of what role impact cratering played in the development of our solar system. Of particular interest are accessory minerals like apatite, which contains various volatiles that can affect the atmosphere of a body, or magnetite whose magnetic properties constitute a remote sensing indicator which allows us to study and understand the internal structures of distant bodies. READ MORE

4. 3. Development of a CFD Boundary Condition to Simulate a Perforated Surface

   University essay from Umeå universitet/Institutionen för fysik

   Author : Medet Kiflemariam; [2021]
   Keywords : Computational Fluid Dynamics; CFD; Boundary Condition; Bleed; Aerospace Engineering; Aeronautical Engineering; Physics;

   Abstract : In aircraft with jet propulsion engine intakes at supersonic speed, strong pressure waves referred to as shockwaves occur, which may interact with any present boundary layers along the intake surface. The adverse pressure gradients associated with Shock Wave-Boundary Layer Interaction (SWBLI) may cause boundary layer flow separation, which can result in disturbances of the flow that can be harmful to the device or decrease engine performance. READ MORE

5. 4. Analytical Exponential-6 Equation of State Based on Monte Carlo Simulations

   University essay from Lunds universitet/Institutionen för energivetenskaper

   Author : Peter Hallstadius; [2021]
   Keywords : Equation of state; exp-6; Monte Carlo; detonation; shock wave; thermochemical code; Technology and Engineering;

   Abstract : The exponential-6 (exp-6) potential is an intermolecular pair potential that is widely used to model fluids at high densities. The path from molecular interaction to equation of state (EOS) for a gas is not straightforward however. READ MORE

6. 5. An Arbitrary Lagrangian-Eulerian Finite Element Method for Shock Wave Propagation: Validating Simulations of Underwater Explosions

   University essay from KTH/Numerisk analys, NA

   Author : Sebastian Sandström; [2021]
   Keywords : finite element; applied mathematics; computational mathematics; hydrocode; arbitrary lagrangian-eulerian; LS-DYNA; tillämpad matematik; beräkningsteknik; finita elementmetoden; hydrokod; arbitrary lagrangian-eulerian; LS-DYNA;

   Abstract : Underwater explosions are often modeled with Arbitrary Lagrangian-Eulerian (ALE) Finite Element Methods. The objective of this thesis is to validate the simulation method, with respect to the propagating shock wave. A two-dimensional axisymmetric model of a spherical TNT charge submerged in water is simulated using LS-DYNA. READ MORE