Exploring the compressibility of deeply buried marine shale matrix and its controlling factors can help achieve efficient petroleum production. Taking ten sets core samples from Ning228 wells in Yanjin area as an example, pore characteristics reservoirs were investigated by applying mercury intrusion porosimetry (MIP) nitrogen adsorption/desorption isotherms at a low temperature 77 K. Mathemati...

We consider a model for the two-dimensional electron gas formed at the interface of oxide heterostructures, which includes a Rashba spin-orbit coupling proportional to the electric field perpendicular to the interface. Based on the standard mechanism of polarity catastrophe, we assume that the electric field has a contribution proportional to the electron density. Under these simple and general...

The statistics of energy levels for a disordered conductor are considered in the critical energy window near the mobility edge. It is shown that, if critical wave functions are multifractal, the one-dimensional gas of levels on the energy axis is compressible, in the sense that the variance of the level number in an interval is 〈(δN)2〉 ∼ χ〈N〉 for 〈N〉 ≫ 1. The compressibility, χ = η/2d, is given...

Thermodynamic properties of matter are conveniently expressed as functional relations between variables known as equations of state. Here we experimentally determine the compressibility, density, and pressure equations of state for an attractive 2D Fermi gas in the normal phase as a function of temperature and interaction strength. In 2D, interacting gases exhibit qualitatively different featur...

We studied splashing on both smooth and rough dry surfaces using high speed photography. For smooth substrates, a striking phenomenon is observed: splashing can be completely suppressed by decreasing the pressure of the surrounding gas. The threshold pressure where a splash first occurs is measured as a function of the impact velocity and found to depend on the molecular weight of the gas and t...

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...

Toy Stars are gas masses where the compressibility is treated without approximations but gravity is replaced by a force which, for any pair of masses, is along their line of centres and proportional to their separation. They provide an invaluable resource for testing the suitability of numerical codes for astrophysical gas dynamics. In this paper, we derive the equations for both small-amplitud...

We modify the Lencka and Anderko fit of the chemical part of the compressibility factor of the AEOS model used to describe hydrogen fluoride. This modification results in improved agreement with experiment in the calculation of the heat capacity with little negative effect on the prediction of other properties. We report new parameters for this model and provide the equations for the fugacity c...

Abstract Identifying changes in coal permeability with gas pressure and accurately codifying mean effective stresses laboratory samples are crucial predicting gas-flow behavior reservoirs. Traditionally, to is assessed using the steady-state method, where equivalent indexed average of upstream downstream pressures coal, while ignoring nonlinear gradient along flow path. For a compressible gas, ...