Through research in the literature, authors noted an absence of permeability characterization in hybrid carbon/glass preform, considering that two reinforcements with different physical characteristics change impregnation performance and, consequently, void formation.
The objective of this study is the theoretical permeability equation development by employing the fluid mechanical approach for a generic hybrid preform to analyze the effect of different fabrics stacking sequence in hybrid preform.
Here [micro] is the dynamic viscosity, [U is the wall velocity, w is the wall thickness, and k is the permeability
of the wafer.
The curves of permeability
with time were obtained at different rock framework's effective stress, shown in Fig.
Figure 2(e) and (f) show that the permeability
of sandstone decreases with an increase in the confining pressure when the heating temperature is lower than 100 [degrees]C.
Finally, a solid-head designed coupled triaxial testing system is applied to study the evolution of thermal cracking and permeability
In these three aspects, [N.sub.2] completed the displacement of C[H.sub.4] to have increased permeability
of coal seam.
The Figure 2 introduces the results of the four repetitions of the permeability
tests for the hydraulic gradients 15, 66, 85 and 140, showing the number of daily readings after the stabilization of the water flow in the specimens versus the coefficient of permeability
B Malik, "Signaling mechanisms regulating endothelial permeability
," Physiological Reviews, vol.
It is shown in Figure 1 that the radius at mercury saturation 30% has the best correlation with porosity and permeability
It is noted that the Knudsen flow relies only on the Knudsen number and the intrinsic permeability
of the porous medium.
where [K.sub.composite] is the composite permeability
of the wall layer including material trapped in the DPF pores, [K.sub.wall] is the permeability
of the clean filter wall, [K.sub.ash] is the permeability
of the ash, and [K.sub.soot] is the permeability
of the soot.