[PDF] Top 20 The permeability of ablative materials under rarefied gas conditions

... pressure-driven gas flow through two differ- ent ablative materials in both their virgin and pyrolised states; a commer- cially available cork-phenolic ablative material, hereafter called ... See full document

... ventional gas resources and developing new technologies such as fuel cells, filters and catalytic converters ...However, under- standing of gas transport in ultra-tight porous materials ... See full document

... It should be recognized that these plots are at best semi-quantitative, since values have had to be ascribed to some of the variables in a very arbitrary manner. However, the predictions indicate the approximate range of ... See full document

... So far, although many attempts have been made to predict the AGP, none of them were able to explain the simple experiment by Klinkenberg 76 years ago, in a wide range of gas pressures. Figure 1 shows the numerical ... See full document

... In recent years, there are many studies with a special focus on the effects of heat treatment on air permeabil- ity and the effects of nano-materials (such as nanosilver, zinc-oxide nanoparticles, nanocopper) on ... See full document

... has gas confined between two co-axial ...a gas is obtained. 32 The convex surface (inner cylinder) overpredicts gas MFP compared to a planar case, while the concave surface (outer cylinder) ... See full document

... The samples used in this study are Fureoi Fm. mudstone (F-M), Takinoue Fm. sandstone (T-S), and Takinoue Fm. tuff (T-T), which are the principal reservoir rocks and the caprock overlaying them for a demonstration site of ... See full document

... of rarefied gas flows, ...of gas resonance and ...highly rarefied flows, which are in reasonable agreement with the theoretical ...of gas resonance and ... See full document

... The study of the thermal behaviour of macroscopic sys- tems in a steady periodic regime is quite important be- cause of its usefulness in investigating the effects pro- duced by solar radiation on the structures located ... See full document

... slow rarefied gas flows between coaxial circular cy- linders with nonuniform surface properties on the basis of kinetic ...the gas is studied over a wide range of the gas rarefaction degree, ... See full document

... The main objective of this work is to quantify the computational performance of the moment method and the DVM, so that the accuracy of the moments method has been evaluated both in macroscopic and microscopic levels. Our ... See full document

... measure permeability during post-failure stable sliding on the ...pulse permeability measurements and hence no values of permeability or specific storage could be ...of permeability at this ... See full document

... By applying the finite element removal tech­ nique in transient dynamic problems, one can expect to violate the energy balance requirement due to non-compliance with the mass conservation law. When an element is removed ... See full document

... LIST OF SYMBOLS atm atmosphere constant short side of slit centigrade mean molecular speed cubic centimeter centimeter diameter of circular orifice elemental area elemental volume expone[r] ... See full document

... the permeability obtained from the GDVM with 100 mesh points is not presented in Fig. 2 (b), which is time consuming to compute. The above comparisons demonstrate superiority of the DUGKS over the GDVM in terms of ... See full document

... biodegradable materials from renewable natural resources has received increasing attention, particularly in EU countries (Davis and Song, 2006) and the use of renewable resources has been revitalized (Tabone IV: ... See full document

... solid materials quantify the amount strength reduces the RTI growth rate, allowing strength to be inferred from RTI ...deforming under RTI, resulting in an asymptotic growth rate dependent on the flow ... See full document

... Abstract. Translational slides in clays are often characterized by long-lasting intermittent movements associated with the fluctuations of pore-water pressure. Physically-based models designed to support hazard analysis ... See full document

... dental materials, and most of the studies in this fi eld are based on in vitro designs, neglecting the salivary pellicle-apatite ...surfaces under oral ...dental materials: titanium, ceramics, and ... See full document

... by least square method became 0.047 MPa and 0.049 µm, respectively. Approximation curve is generally consistent with experimental data that permeability increases with an increase of differential pore pressure, ... See full document