Rarefaction shock waves in porous media that accumulate CO2, CH4, N2

Shock Waves ◽  
1994 ◽  
Vol 3 (3) ◽  
pp. 223-232 ◽  
Author(s):  
J. Litwiniszyn
Keyword(s):  
Porous Media ◽  
Shock Waves ◽  
Rarefaction Shock

A simple constitutive model for predicting the pressure histories developed behind rigid porous media impinged by shock waves

2013 ◽  
Vol 718 ◽  
pp. 507-523 ◽  
Author(s):  
O. Ram ◽  
O. Sadot
Keyword(s):  
Shock Wave ◽  
Porous Medium ◽  
Porous Media ◽  
Shock Waves ◽  
Constitutive Model ◽  
Wave Attenuation ◽  
Front Face ◽  
Viscous Effects ◽  
Pressure History ◽  
Target Wall

AbstractShock wave attenuation by means of rigid porous media is often applied when protective structures are dealt with. The passage of a shock wave through a layer of porous medium is accompanied by diffractions and viscous effects that attenuate and weaken the transmitted shock, thus reducing the load that develops on the target wall that is placed behind the protective layer. In the present study, the parameters governing the pressure build-up on the target wall are experimentally investigated using a shock tube facility. Different porous samples are impinged by normal shock waves of various strengths and the subsequent pressure histories that are developed on the target wall are recorded. In addition, different standoff distances from the target wall are investigated. Assuming that the flow through the porous medium is close to being isentropic enabled us to develop a general constitutive model for predicting the pressure history developed on the target wall. This model can be applied to predict the pressure build-up on the target wall for any pressure history that is imposed on the front face of the porous sample without the need to conduct numerous experiments. Results obtained by other investigators are found to be in very good agreement with the predictions of the presently developed constitutive model.

Experimental and theoretical investigation of detonation and shock waves action on phase of hydrocarbon mixture in porous media

Shock Waves ◽  
2009 ◽  
pp. 245-250
Author(s):  
D.I. Baklanov ◽  
L.B. Director ◽  
S.V. Golovastov ◽  
V.V. Golub ◽  
I.L. Maikov ◽  
...  
Keyword(s):  
Porous Media ◽  
Shock Waves ◽  
Theoretical Investigation ◽  
Hydrocarbon Mixture ◽  
And Shock Waves

Converging shock waves in porous media

2004 ◽  
Vol 30 (1) ◽  
pp. 33-35 ◽  
Author(s):  
A. A. Charakhch’yan ◽  
I. V. Lomonosov ◽  
V. V. Milyavskii ◽  
V. E. Fortov ◽  
A. A. Frolova ◽  
...  
Keyword(s):  
Porous Media ◽  
Shock Waves ◽  
Converging Shock Waves

Mathematical Modeling the Nonlinear 1D Dynamics of Elastic Heteromodular and Porous Materials

2019 ◽  
Vol 945 ◽  
pp. 899-905
Author(s):  
Olga V. Dudko ◽  
Victoria E. Ragozina ◽  
Anastasia A. Lapteva
Keyword(s):  
Mathematical Modeling ◽  
Mechanical Properties ◽  
Porous Media ◽  
Shock Waves ◽  
Porous Materials ◽  
Piecewise Linear ◽  
Nonlinear Effects ◽  
Generalized Solutions ◽  
Linear Elastic ◽  
Riemann Waves

Approaches to mathematical modeling of nonlinear strain dynamics in heteromodular and porous materials are discussed; the mechanical properties of media are described in terms of the simple piecewise linear elastic models. Several nonstationary 1D boundary value problems show that the singularity of model relationships gives rise to shock waves and centered Riemann waves in generalized solutions. Nonstationary load modes leading to the listed nonlinear effects are indicated separately for heteromodular and porous media.

Negative shock waves

1973 ◽  
Vol 60 (1) ◽  
pp. 187-208 ◽  
Author(s):  
P. A. Thompson ◽  
K. C. Lambrakis
Keyword(s):  
Shock Waves ◽  
Continuum Model ◽  
Single Phase ◽  
Thermodynamic Quantity ◽  
Stability Conditions ◽  
Formation And Evolution ◽  
Molecular Complexity ◽  
Rarefaction Shock ◽  
Dynamic Formation ◽  
Negative Shock

Negative or rarefaction shock waves may exist in single-phase fluids under certain conditions. It is necessary that a particular fluid thermodynamic quantity Γ ≡ −½δ In (δP/δν)s/δ In ν be negative: this condition appears to be met for sufficiently large specific heat, corresponding to a sufficient level of molecular complexity. The dynamic formation and evolution of a negative shock is treated, as well as its properties. Such shocks satisfy stability conditions and have a positive, though small, entropy jump. The viscous shock structure is found from an approximate continuum model. Possible experimental difficulties in the laboratory production of negative shocks are briefly discussed.

Sign in / Sign up

Export Citation Format

Share Document