Permeability and dynamic elastic moduli of controlled porosity ultra-precision aerostatic structures

Relationship among porosity, permeability, electrical and elastic properties

Electrical resisivity is usually easier to measure in the laboratory and in-situ than permeability. Therefore, a method of combination between permeability and electrical resistivity might be used to define the fluid flow of reservoir rocks from resistivity data. However, estimating permeability from resistivity has been a problem examined by different authors. Furthermore, neither electrical n...

Analytical Representations of Elastic Moduli Data With Simultaneous Dependence on Temperature and Porosity

An analytical model providing simultaneous, self-consistent representations of the temperature and porosity dependence of the elastic and bulk moduli of polycrystalline ceramics is applied to data compiled from the literature for 24 oxide ceramics.

Effect of Glauconite on the Elastic Properties, Porosity, and Permeability of Reservoirs Rocks

Physical Determination of Permeability Variation With Porosity For Composite Performs

Abstract: This paper presents the results of experimental determination of fiber bed permeability variation with porosity. Flow measurement experiments were designed to measure fiber mat permeability for fiber beds with various fiber volume fractions. Woven fiberglass, chopped fiberglass, and carbon fiber mats were used as reinforcements. The effects of reinforcement type and porosity on fiber ...

Development of Orifice-type Aerostatic Thrust Bearing for Precision Machine

Air bearings are used in precision machines and measurement equipments for recently years. Unlike conventional ball or roll bearings, there is no physical contact between the sliding surfaces and the moving surface. Therefore, the structure with air bearings can glide smoothly on the other surface to avoid generating the small particles from the friction contact and also minimize the control ef...