Specifically, the disclosed methods, systems, devices and/or apparatus relate to determining the density of a fluid in situ (e.g., in a downhole tool) under the Earth's surface using extrapolation and/or interpolation technique(s). Some example methods may include obtaining a fluid sample ...
The density and the compressibility at a given chemical potential are calculated perturbatively in various ways. Whether from their field theoretical definition, or deriving them from one another using the thermodynamical relations or also using the equation of motion, the results are in all ways of...
\begin{equation} \mu^\prime = \frac{1}{2}U a^3 \end{equation} Figure. 绕球流动 当然流动势函数也可以求解,这要求控制方程而边界条件如下: \begin{equation} \begin{cases} \begin{aligned} &\frac{\partial}{\partial r}\left( r^2\frac{\partial \phi}{\partial} \right)+ \frac{1}{\sin...
Comparing this result with the hypernetted chain (HNC) equation we propose a weighted density approximation for the so-called bridge function that improves the ordinary HNC theory. For a hard sphere fluid this method leads to thermodynamically more consistent results than the HNC, Percus-Yevick (...
Equivalent circulating density is the effective density of a circulating fluid in the wellbore resulting from the sum of the hydrostatic pressure imposed by the static fluid column and the friction pressure. From: Universal Well Control, 2022 About this pageSet alert Discover other topics ...
We prove a global-in-time existence result of a weak solution for a magnetohydrodynamic (MHD) problem set in a bounded domain of $\mathbb{R}^3$. The fluid is supposed to be incompressible but with an unhomogeneous density, viscosity and electrical conductivity. The displacement currents are ...
a density 美 英 na.密着(海)流 英汉 na. 1. 密着(海)流
Here, we suggest combining gas, liquid and multistable elastic capsules to create an artificial fluid with a multitude of stable states. We study, theoretically and experimentally, the suspension’s internal energy, equilibrium pressure-density relations, and their stability for both adiabatic and ...
3.1.1 Density matrix and Liouville equation The most natural approach to model the statistics of a quantum system is the density matrix formalism. If we consider a basis ∣ψi〉 of the electron quantum states with an occupation probability pi related to the statistical physics of the system, ...
We have used density functional theory (DFT) of freezing to investigate the fluid-solid phase transition in a system of super-paramagnetic colloidal particles confined to a two dimensional plane and exposed to an external magnetic field which is tilted from the direction parallel to the plane. Mag...