Reflection of a spherical blast wave from a planar surface

Numerical simulation of liquid mass collision with a wall

“…The latter agreement is explained by the fact that the thickness of the liquid layer wetting the wall is sufficiently small. It is interesting to note that the division of the process of interaction of the second shock wave with the wall into the stages of regular and Mach reflections is in accord with the known properties of the interaction of a point explosion-induced spherical shock wave with a rigid wall determined by Podlubnyi and Fonarev (1974). Moreover, at the stage of regular reflection the pressure maximum on the wall in the case of the spherical shock wave also appears on the perimeter of the reflection area, but in this case, unlike that shown in Figure 9, the maximum pressure is continuously decreasing just because of the weakening of the divergent explosion-induced shock wave.…”

Basic mechanisms of signal enhancement in ns double-pulse laser-induced breakdown spectroscopy in a gas environment

“…When the expanding SW reaches the target, the mass contained at the shock front starts to pile-up at the target surface until a reected wave which moves backward is formed. Numerical models 68,69 of SW reection reveal that such an initial accumulation of mass at the target surface forms a gas layer characterized by pressure and density higher than the original shock front. Experimentally, this is conrmed by the presence of a bright layer near the target (indicating high density in Schlieren shadowgraphic imaging) in frames 3 and 4 of Fig.…”

On Blast Pressure Analysis Due to a Partially Confined Explosion: II. Numerical Studies

“…The shock wave interaction with the envelope elements is quite well known and has been studied in many books (Baker et al, 1983;Kinney, 1962;Bangash, 1993), guides (A718300, 1974; Ben-Dor, 2000), reports (Michael, Swisdak,1975) and standards (UFC 3-340-02, 2008, TM-5-855-1, 1986; AASTP-1, 2006). The simplest blast problem deals with an external explosion in the proximity of an obstacle either planar (Shear, Makino, 1967;Liang et al, 2002;Podlubnyi, Fonarev, 1974) or shaped (Kivity, 1992;Igra et al, 2003). The problem under consideration of a confined explosion is more complex and was less investigated (Yi Hu et al, 2011, Savir et al, 2009Feldgun et al, 2011).…”