Modeling a Supersonic Solid State Detonation in an Overdriven Porous Mixture of Aluminum and Teflon

2011 ◽  
Vol 673 ◽  
pp. 41-46
Author(s):  
Sun Hee Yoo ◽  
Scott D. Stewart ◽  
David E. Lambert
Keyword(s):  
Solid State ◽  
Equation Of State ◽  
Phenomenological Models ◽  
Higher Dimensional ◽  
Shock Dynamics ◽  
Practical Engineering ◽  
Dimensional Simulation ◽  
Highly Porous

In this paper, we demonstrate that an engineering device can be carefully designed in such a way that an overdriven solid state detonation can be initiated and propagated supersonically in a highly porous mixture of aluminum and Teflon. The equation of state and kinetics for the porous mixture are phenomenological models that were developed in our previous work [1]. This demonstration can be regarded as a good verification that the models which were used mainly in 1-D simulation are practically applicable and consistent to higher dimensional simulation of a shock dynamics in practical engineering devices.

scholarly journals Phenomenological models of the quark-gluon plasma equation of state

2002 ◽  
Vol 106-107 ◽  
pp. 528-530
Author(s):  
Peter N. Meisinger ◽  
Travis R. Miller ◽  
Michael C. Ogilvie
Keyword(s):  
Equation Of State ◽  
Phenomenological Models ◽  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Plasma Equation

Few-Parameter Equation of State of the Shock Adiabat with Allowance for Melting

2008 ◽  
Vol 3 (4) ◽  
pp. 52-63
Author(s):  
Evgeny I. Kraus
Keyword(s):  
Solid State ◽  
Equation Of State ◽  
Temperature Dependence ◽  
Thermodynamic Functions ◽  
Melting Curve ◽  
Shock Adiabat ◽  
Elastic Component ◽  
Configuration Entropy ◽  
Model Equations ◽  
State Body

The model equations for thermodynamic functions of liquid status based on volume and temperature dependence of Gruneisen coefficient are offered. Thermal components are described by the Debye’s model. Despite the perfect analogy to solid-state body the distinction in an elastic component of energy and pressures is taken into consideration when deriving the equations. The configuration entropy is embedded into thermodynamic functions of liquid. It describes a disorderliness measure of liquid and results in the final values of the entropy when temperature formally amounts to zero. The melting curve as the boundary between phases is constructed.

scholarly journals Poly(d,l-Lactic acid) Composite Foams Containing Phosphate Glass Particles Produced via Solid-State Foaming Using CO2 for Bone Tissue Engineering Applications

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 231 ◽  
Author(s):  
Maziar Shah Mohammadi ◽  
Ehsan Rezabeigi ◽  
Jason Bertram ◽  
Benedetto Marelli ◽  
Richard Gendron ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Lactic Acid ◽  
Solid State ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Melt Compounding ◽  
Composite Foams ◽  
Biodegradable Poly ◽  
Gaseous Carbon Dioxide ◽  
Highly Porous

This study reports on the production and characterization of highly porous (up to 91%) composite foams for potential bone tissue engineering (BTE) applications. A calcium phosphate-based glass particulate (PGP) filler of the formulation 50P2O5-40CaO-10TiO2 mol.%, was incorporated into biodegradable poly(d,l-lactic acid) (PDLLA) at 5, 10, 20, and 30 vol.%. The composites were fabricated by melt compounding (extrusion) and compression molding, and converted into porous structures through solid-state foaming (SSF) using high-pressure gaseous carbon dioxide. The morphological and mechanical properties of neat PDLLA and composites in both nonporous and porous states were examined. Scanning electron microscopy micrographs showed that the PGPs were well dispersed throughout the matrices. The highly porous composite systems exhibited improved compressive strength and Young’s modulus (up to >2-fold) and well-interconnected macropores (up to ~78% open pores at 30 vol.% PGP) compared to those of the neat PDLLA foam. The pore size of the composite foams decreased with increasing PGPs content from an average of 920 µm for neat PDLLA foam to 190 µm for PDLLA-30PGP. Furthermore, the experimental data was in line with the Gibson and Ashby model, and effective microstructural changes were confirmed to occur upon 30 vol.% PGP incorporation. Interestingly, the SSF technique allowed for a high incorporation of bioactive particles (up to 30 vol.%—equivalent to ~46 wt.%) while maintaining the morphological and mechanical criteria required for BTE scaffolds. Based on the results, the SSF technique can offer more advantages and flexibility for designing composite foams with tunable characteristics compared to other methods used for the fabrication of BTE scaffolds.

scholarly journals Solid State Hydrogen Storage in Alanates and Alanate-Based Compounds: A Review

Metals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 567 ◽  
Author(s):  
Chiara Milanese ◽  
Sebastiano Garroni ◽  
Fabiana Gennari ◽  
Amedeo Marini ◽  
Thomas Klassen ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Hydrogen Absorption ◽  
Alkaline Earth ◽  
Molecular Form ◽  
Alkaline Earth Metals ◽  
Highly Porous Materials ◽  
Physico Chemical ◽  
Solid Form ◽  
Highly Porous

The safest way to store hydrogen is in solid form, physically entrapped in molecular form in highly porous materials, or chemically bound in atomic form in hydrides. Among the different families of these compounds, alkaline and alkaline earth metals alumino-hydrides (alanates) have been regarded as promising storing media and have been extensively studied since 1997, when Bogdanovic and Schwickardi reported that Ti-doped sodium alanate could be reversibly dehydrogenated under moderate conditions. In this review, the preparative methods; the crystal structure; the physico-chemical and hydrogen absorption-desorption properties of the alanates of Li, Na, K, Ca, Mg, Y, Eu, and Sr; and of some of the most interesting multi-cation alanates will be summarized and discussed. The most promising alanate-based reactive hydride composite (RHC) systems developed in the last few years will also be described and commented on concerning their hydrogen absorption and desorption performance.

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