Modeling of the interaction between an air shock wave and a porous screen

Numerical study of the transfer of shock-wave loading to a screened flat wall through a layer of a powdered medium and a subsequent air gap

“…The numerical data were compared in [21,29] with the experimental results of [12,17], and it turned out that the models of motion of the phases offer satisfactory descriptions of the wave processes in screening layers of porous powdered media. The effect of the governing parameters of the granular medium and the air shock wave on the total stress of the mixture and the pressure of the pore gas on a screened wall was analyzed in [22,23,29]. It was demonstrated [24] that the gas pressure and the total stress of the mixture on a combined discontinuity, i.e., on the gaspowder interface, experience jumps in the case of interaction of nonlinear (shock) waves with a layer of a granular medium [36,37].…”

“…Gubaidullin et al [25][26][27][28][29][30][31][32] used the assumption of the linear-viscoelastic deformation of the powder skeleton by the scheme proposed in [35], and the numerical solution of the equations of motion of the phases of the medium saturated by a gas was performed by the LaxWendroff method [30,32]. The numerical data were compared in [21,29] with the experimental results of [12,17], and it turned out that the models of motion of the phases offer satisfactory descriptions of the wave processes in screening layers of porous powdered media. The effect of the governing parameters of the granular medium and the air shock wave on the total stress of the mixture and the pressure of the pore gas on a screened wall was analyzed in [22,23,29].…”

“…Kutushev et al [21][22][23][24] used the assumption of a nonlinear-elastic behavior of the "skeleton" of the porous medium with the equation of state [33] and numerically integrated the equations of motion of the gaseous and disperse phases by the method of coarse particles by the algorithm developed in [34]. Gubaidullin et al [25][26][27][28][29][30][31][32] used the assumption of the linear-viscoelastic deformation of the powder skeleton by the scheme proposed in [35], and the numerical solution of the equations of motion of the phases of the medium saturated by a gas was performed by the LaxWendroff method [30,32]. The numerical data were compared in [21,29] with the experimental results of [12,17], and it turned out that the models of motion of the phases offer satisfactory descriptions of the wave processes in screening layers of porous powdered media.…”

“…The goal of the present work, which is a logical continuation of [21][22][23][24][25][26][27][28][29][30][31][32], was a numerical study of the action of an air shock wave on a solid flat wall through a screening layer of a porous powdered medium and a subsequent gap filled by a gas.…”

“…The theoretical activities [21][22][23][24][25][26][27][28][29][30][31][32] were aimed at a detailed study of the action of a shock wave on a solid flat wall screened by a layer of a porous powdered medium with the use of various models of two-velocity, two-temperature, two-stress contact mixtures of a gas and solid particles. Kutushev et al [21][22][23][24] used the assumption of a nonlinear-elastic behavior of the "skeleton" of the porous medium with the equation of state [33] and numerically integrated the equations of motion of the gaseous and disperse phases by the method of coarse particles by the algorithm developed in [34].…”