It is well-known that the number fluctuation in the grand canonical ensemble, which is directly proportional to the compressibility, diverges for an ideal bose gas as T → 0. We show that this divergence is removed when the atoms interact in one dimension through an inverse square two-body interaction. In two dimensions, similar results are obtained using a self-consistent ThomasFermi (TF) model...

To investigate the anisotropy of coal swelling, this study proposes an effective stress model for saturated, adsorptive fractured porous media by considering gas adsorption induced surface change on solid-fluid interface. The can be used to capture anisotropic swelling combining mechanical properties and link with permeability. Direction dependent fracture compressibility is describe evolution ...

We theoretically investigate the isothermal compressibility $\kappa_{T}$ in normal state of an ultracold Fermi gas. Including pairing fluctuations, as well preformed-pair formations, within framework self-consistent $T$-matrix approximation (SCTMA), we evaluate temperature dependence this thermodynamic quantity over entire BCS (Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein condensation) crossov...

We numerically investigate the effect of non-condensable gas inside a vapor bubble on dynamics, collapse pressure and impact spherical aspherical collapses. Free has damping that can weaken wave enhance rebound. To estimate this numerically, we derive validate multi-component model for bubbles containing gas. For cavitating liquid gas, employ homogeneous mixture with coupled equation state all ...

Determination of porosity, permeability, and pore volume compressibility of reservoir rocks and those variations with effective stress changes are of great interest in petroleum engineering. This paper has studied the influence of pore types of carbonate reservoir rocks on pore volume compressibility as well as Klinkenberg permeability and porosity at different stress values. In the current stu...

OBJECTIVE To explore triceps skinfold (TSF) compressibility and its associated factors among hospitalized patients. METHODS A cross-sectional study was conducted among hospitalized adult patients. Evolution of tissue compressibility during two seconds was registered and 120 TSF values were obtained using a digital calliper. Compressibility was determined according to the difference between th...

This paper reports density and speed of sound data for solutions of the ionic liquids (ILs) [C4mim]Cl and [C4mim][CF3SO3] in aqueous solution of 0.05 w/w amino acids of alanine, serine and proline at T = (288.15, 298.15, 308.15 and 318.15) K. From the experimental data measured, the apparent molar volume (Vϕ), isentropic compressibility ( ), and apparent molar isentropic compression ( ) have be...

The paper is devoted to studies of the volumetric response rocks caused by changes in their stress state. Changes volume fracture and intergranular components pore space based on measurements fluid extruded from a rock sample with an increase its all-round compression have been experimentally obtained analyzed. Determination porosity authors' earlier proposed method calculation using values lon...