Axisymmetric Cylindrical Converging Shock-Interface Interaction A $(r,t)$ wave diagram is built from 1D highly refined cylindrical radially symetric simulations ...

Converging shock experiments in a conical shocktube. The experiments of Setchell,Strom and Sturtevant (JFM 1972), provide an excellent opportunity for validation ...

Reflected shock structure for conical geometry. The initial form of the shock reflection as a Mach 6 shock in Argon enters a cone is dependent on the conical half ...

Converging shock simulations in a conical shocktube. To better exercise the GFM, the converging shock in a conical shocktube VTF simulations were done with both a ...

Centerline shock speed collapse. The normalized shock speed along the centerline collapses onto a unique structure as the shock approaches a strong shock limit. Presented ...

Conical (ie 3D) geometry vs Wedge-shaped (2D) shocktube. The refected shocks in this 3D example have a component that is parallel to the axis of symmetry and hence ...

3D Cylindrical RMI 3D Large Eddy Simulations (LES) are performed for different initial shock Mach number. The Ghost Fluid Method (GFM) allows the use of an inner ...

The Caltech ASC converging shock experiments (P. Dimotakis) The converging shock experiments being conducted by P. Dimotakis are broken into three phases of increasing ...

Phase 0 of the Caltech ASC converging shock experiments. A single gas is used, the shock interacts with the boundary of the wedge producing shock mach stems, reflected ...

Phase 1 of the Caltech ASC converging shock experiments. The lensing of the shock by a contact is not a trivial problem. At the point where the lens and wedge meet ...

Phase 2 of the Caltech ASC converging shock experiments. A third gas is used. It is placed within the wedge after the lens. Perturbations on the contact between this ...

Phase 0: Driver based expansions. Back to Phase 0 In the idealized case, the diaphragm rupture in the shocktube is a Riemann problem: the driver gas (generally He ...

Phase 0 simulations, Mach 1.92 Back to Phase 0 Using the same geometry as the Mach 1.5 case (upper plate at 14.06 degrees and lower plate angle of 9.994 degrees) ...

Phase 0 simulations, Mach 1.5: late time Back to Phase 0 Here we examine the flow in the wedge after the shock has bounced off the apex and is exiting the wedge. ...

Phase 0 simulations, Mach 1.5 Back to Phase 0 Simulations of the Phase 0 experiment, computed using clawpack and 4 levels (base grid of 200x100 with refinement factors ...

Back to Phase 0 The von Neumann Mach Reflection (vNR) resembles to the Simple Mach Reflection (SMR) but can not be described by simple two- or three-shock theories ...

Phase 0 Visualization Issues Back to Phase 0 Chris Bond discovered that the imaging system used to aquire the Schlierens of the flow had an aspect ratio of 1.03 due ...

Two-dimensional test simulations of converging shocks Back to Phase 2 A test calculation with a two-dimensional two-component approximate Roe solver originally developed ...

Three-dimensional test simulations of converging shocks Back to Phase 2 A test calculation with a two-dimensional two-component approximate Roe solver originally ...

Back to Phase 2 These simulations were done with only 1 level of refinement, but using the weno-tcd solver with LES. The resolution was 115x38x40 with a refinement ...

Back to Phase 2 These simulations were done with only 2 levels of refinement, but using the weno-tcd solver with LES. The base resolution was 115x38x40 with a refinement ...

Back to Phase 2 As in the Phase 1 simulations, there is a shocktube gas (gas1) and a lensing gas (gas2) related by a density ratio (gas2 / gas1 ) of 1.4. The shocktube ...

Back to Phase 2 Unlike the Phase 1 simulations, in which there is a shocktube gas (gas1) and a lensing gas (gas2), here the lens is absent (ie gas1 gas2). The initial ...

Back to Phase 2 As in the Phase 1 simulations, there is a shocktube gas (gas1) and a lensing gas (gas2) related by a density ratio (gas2 / gas1 ) of 1.4. The shocktube ...

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Converging Shock Experiments Shock focusing by convergent channels is explored by use of the VTF. Different geometries are simulated, with an eye to existing experiments ...

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