Measure of the relative volume change of a fluid or solid as a response to a pressure change
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In thermodynamics and fluid mechanics, the compressibility (also known as the coefficient of compressibility[1] or, if the temperature is held constant, the isothermal compressibility[2]) is a measure of the instantaneous relative volume change of a fluid or solid as a response to a pressure (or mean stress) change. In its simple form, the compressibility (denoted β in some fields) may be expressed as
,
where V is volume and p is pressure. The choice to define compressibility as the negative of the fraction makes compressibility positive in the (usual) case that an increase in pressure induces a reduction in volume. The reciprocal of compressibility at fixed temperature is called the isothermal bulk modulus.
^"Coefficient of compressibility - AMS Glossary". Glossary.AMetSoc.org. Retrieved 3 May 2017.
^"Isothermal compressibility of gases -". Petrowiki.org. 3 June 2015. Retrieved 3 May 2017.
before compressibility can be calculated. Alternatively, the compressibility factor for specific gases can be read from generalized compressibility charts...
Compressible flow (or gas dynamics) is the branch of fluid mechanics that deals with flows having significant changes in fluid density. While all flows...
the assumption that the compressibility factor Z is set to 1 meaning that this pneumatic ratio remains constant. A compressibility factor of one also requires...
mechanics and thermodynamics the compressibility equation refers to an equation which relates the isothermal compressibility (and indirectly the pressure)...
effects of compressibility. Compressibility is a description of the amount of change of density in the flow. When the effects of compressibility on the solution...
reduced temperature and reduced pressure, have approximately the same compressibility factor and all deviate from ideal gas behavior to about the same degree...
updraft. The compressibility of water is a function of pressure and temperature. At 0 °C, at the limit of zero pressure, the compressibility is 5.1×10−10 Pa−1...
is a measure of the compressibility characteristics of fluid flow: the fluid (air) behaves under the influence of compressibility in a similar manner...
The Carr index (Carr's index or Carr's Compressibility Index) is an indicator of the compressibility of a powder. It is named after the scientist Ralph...
the medium's compressibility and density. In solids, the compression waves are analogous to those in fluids, depending on compressibility and density,...
came from NACA engineer John Stack, the head of NACA's compressibility division. Compressibility is a major issue as aircraft approach Mach 1, and research...
the compressibility β = 1 ρ d ρ d p . {\displaystyle \beta ={\frac {1}{\rho }}{\frac {\mathrm {d} \rho }{\mathrm {d} p}}.} If the compressibility is acceptably...
[user-generated source] Brake fluids must maintain a low level of compressibility, even with varying temperatures to accommodate different environmental...
of the bulk modulus at fixed temperature is called the isothermal compressibility. The bulk modulus K {\displaystyle K} (which is usually positive) can...
be called viscous fluids. Fluids may be classified by their compressibility: Compressible fluid: A fluid that causes volume reduction or density change...
0Z, a data set in statistics where the Standard score is zero 0Z, a Compressibility factor or zero Z0 (disambiguation) This disambiguation page lists articles...
compressibility less than that of the surrounding fluid, the object's equilibrium is stable and it remains at rest. If, however, its compressibility is...
equivalent airspeed (EAS) is calibrated airspeed (CAS) corrected for the compressibility of air at a non-trivial Mach number. It is also the airspeed at sea...
modulus of compressibility of the liquid in the pipe, expressed in Pa. The latter follows from a series of hydraulic concepts: compressibility of the liquid...
consolidation Coefficient of compressibility a v = Δ e Δ σ ′ {\displaystyle a_{v}={\frac {\Delta e}{\Delta \sigma _{'}}}} . The compressibility of saturated specimens...
appearing at or above the critical Mach number became known as compressibility. Compressibility led to a number of accidents involving high-speed military...
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