In physics, a perfect fluid or ideal fluid is a fluid that can be completely characterized by its rest frame mass density ρ m {\displaystyle \rho _{m}}...

compressibility are called perfect fluids. Matter Liquid Gas Supercritical fluid "Fluid | Definition, Models, Newtonian Fluids, Non-Newtonian Fluids, & Facts". Encyclopedia...

context of perfect fluids. Finally, there are proposals for extension of the energy conditions to spacetimes containing non-perfect fluids, where the...

a fluid. In astrophysics, fluid solutions are often employed as stellar models, since a perfect gas can be thought of as a special case of a perfect fluid...

In cosmology, the equation of state of a perfect fluid is characterized by a dimensionless number w {\displaystyle w} , equal to the ratio of its pressure...

gravitation for the Friedmann–Lemaître–Robertson–Walker metric and a perfect fluid with a given mass density ρ and pressure p. The equations for negative...

gravitation, particularly general relativity, a static spherically symmetric perfect fluid solution (a term which is often abbreviated as ssspf) is a spacetime...

u_{a}} is the fluid's 4-velocity vector field, and p {\displaystyle p} is the pressure. Non-interacting dust ( a special case of perfect fluid ): T a b =...

star should be a perfect fluid or dust rather than a vacuum, and then argues that there exist no asymptotically flat rotating perfect fluid solutions in general...

In general relativity, the Wahlquist fluid is an exact rotating perfect fluid solution to Einstein's equation with equation of state corresponding to constant...

immersed in a fluid subject to an ambient gravitational field. If a bullet has neutral buoyancy when it is at rest in a perfect fluid and then it is...

In fluid mechanics, hydrostatic equilibrium (hydrostatic balance, hydrostasy) is the condition of a fluid or plastic solid at rest, which occurs when external...

physical chemistry and engineering, fluid dynamics is a subdiscipline of fluid mechanics that describes the flow of fluids – liquids and gases. It has several...

density of a perfect fluid that has positive mass density but vanishing pressure. Dust solutions are an important special case of fluid solutions in general...

Lambdavacuum solution and the second term is characteristic of a pressureless perfect fluid or dust solution. The cosmological constant is carefully chosen to partially...

(for example, if the stress–energy tensor is chosen to be that of the perfect fluid, a spherically symmetric solution can serve as a stellar model) Alternatively...

reference. It has a direct physical interpretation. In the case of a perfect fluid this component is T 00 = ρ   , {\displaystyle T^{00}=\rho ~,} where...

In fluid dynamics, the Euler equations are a set of partial differential equations governing adiabatic and inviscid flow. They are named after Leonhard...

due to the decay of peculiar momenta. In general, we can consider a perfect fluid with pressure p = w ρ {\displaystyle p=w\rho } , where ρ {\displaystyle...

approximated as composed by non-interacting constituents, each one being a perfect fluid with density ρ i {\displaystyle \rho _{i}} , partial pressure p i {\displaystyle...

(1986). "Self-similar spatially homogeneous cosmologies: orthogonal perfect fluid and vacuum solutions". Class. Quantum Grav. 3 (6): 1105–1124. Bibcode:1986CQGra...

Pascal's Law, a law of hydrostatics is developed, stating that, in a perfect fluid, the pressure exerted on it anywhere is transmitted equally. Dr Thomas...

from a black hole. Sonic black holes are possible because phonons in perfect fluids exhibit the same properties of motion as fields, such as gravity, in...

c^{2}} and it is negative. Let us assume a static, spherically symmetric perfect fluid. The metric components are similar to those for the Schwarzschild metric:...

flaws. A perfect fluid is one that is incompressible and non-viscous — this, again, is an ideal fluid that does not exist in nature. A perfect gas is one...

Einstein field equation is static, but this is certainly not true for perfect fluids. The extension of the exterior region of the Schwarzschild vacuum solution...

Universe as composed of non-interacting constituents, each one being a perfect fluid. If a particle is moving at a constant velocity in a non-expanding universe...

have yielded evidence for liquid-like quark matter exhibiting "nearly perfect" fluid motion. The quark–gluon plasma would be characterized by a great increase...

Stewart–Tolman effect Oscillatory universe Static spherically symmetric perfect fluid Thin Man (nuclear bomb) Gale, George (2014), "Tolman, Richard Chace"...

multiple names: authors list (link) See p. 139-140 for discussion of the stress-energy tensor for a perfect fluid such as an ideal gas. Co-moving frame...