The work increment, dW, is F×dx, where dx is the distance increment; simultaneously multiplying and dividing by the area, we have [5.8.3]dW=FAAdx=PdV Thus the net pressure–volume work done by the heart is the integral of the pressure–volume curve minus the work done on the heart ...
platinum/ Pressure-volume equationsolid statebulk modulusThe equation V(P)=V oB ln[(1+C(P1)], where V is volume at any pressure ( P), V o the volume at 1 bar and B and C fitted parameters, is shown to be useful as an equation of state for many solids over a large pressure ...
Decompensated heart failure occurs when the increase in fluid volume is no longer able to maintain cardiac output, initiating a vicious cycle of continually increasing fluid volume despite eventually detrimental effects to cardiac output1,3. At this point, venous pressure is high enough to release ...
From Fig. 2, the present calculated equation of state from 0 to 80 GPa agrees well with the previous experimental data17,19,23,24,25. The agreement of present calculated structural parameters and equation of state with the experiment indicates the feasibility and reliability of the computational ...
Weakly nonlinear propagation of pressure wave in bubbly liquids is described by the Korteweg-de Vries Burgers (KdVB) equation. The pressure wave evolves into the waveform having shock wave and soliton features since the KdVB equation consists of the nonlinear, dissipation, and dispersion terms. Alt...
Using the third-order Birch-Murnaghan equation of state (EoS), we fitted the pressure-volume-temperature (P-V-T) data and obtained the zero-pressure bulk modulus K0=138(2) GPa, its pressure derivative K0'=3.0(3), the temperature derivative of the bulk modulus ((∂K/∂T)P=-0.004(...
The results are accounted for through an universal equation relating the PL lifetime as a function of P (or V ) and T , using an activation energy and a transition rate that are strongly dependent on the lattice parameter (crystal volume). 展开 ...
A novel constitutive equation for viscoelastic- thixotropic fluids and its application in the characterization of blood hysteresis loop In this work, a novel consititutive equation for viscoelastic-thixotropic fluid has been developed based on the principle of mechanical analogy, and used t... F Bo...
Fluid flow in the reservoir can be described by the diffusivity equation in two dimensions, that is(6)∂∂x(kμ∂p∂x)+∂∂y(kμ∂p∂y)=ϕct∂p∂t The internal boundary condition is(7)p(x,0,t)=pf(x,t)which imposes the pressure in the reservoir side of the fr...
Since 1990, many groups of pressure–volume–temperature (PVT) data from experiments and molecular dynamics (MD) or Monte Carlo (MC) simulations have been reported for supercritical and subcritical water. In this work, fifteen groups of PVT data (253.15–4356 K and 0–90.5 GPa) are evaluated...