For a calorically perfect gas such as an ideal gas, the enthalpy is directly proportional to the temperature, and this leads to the concept of the total ( or stagnation ) temperature.
22.
The dimensionless enthalpy equation is shown below with an equation relating the static temperature with its value at the choke location for a calorically perfect gas where the heat capacity at constant pressure, c p, remains constant.
23.
The perfect gas equation arose from the work of Robert Boyle, Edme Mariotte and Joseph Louis Gay-Lussac, who, in studying the properties of real gases, found formulas applicable not to these but to an ideal, perfect gas.
24.
The perfect gas equation arose from the work of Robert Boyle, Edme Mariotte and Joseph Louis Gay-Lussac, who, in studying the properties of real gases, found formulas applicable not to these but to an ideal, perfect gas.
25.
Under a perfect gas model, the " ratio of specific heats " ( also called " isentropic exponent ", adiabatic index, " gamma " or " kappa " ) is assumed to be constant along with the gas constant.
26.
The plasma pressure p can be calculated by the state equation of a perfect gas p = n K _ B T, where n is the particle number density, K _ B the Boltzmann constant and T the plasma temperature.
27.
In astrophysics, fluid solutions are often employed as "'stellar models "'. ( It might help to think of a perfect gas as a special case of a perfect fluid . ) In cosmology, fluid solutions are often used as cosmological models.
28.
The perfect gas theory begins to break down at 550 K and is not usable at temperatures greater than 2, 000 K . For temperatures greater than 2, 000 K, a heat shield designer must use a " real gas model ".
29.
If the pressure-dependence is neglected ( and possibly the temperature-dependence as well ) in a particular application, sometimes the gas is said to be a perfect gas, although the exact assumptions may vary depending on the author and / or field of science.
30.
"' Non ideal compressible fluid dynamics "', abbreviated as "'NICFD "', is a branch of fluid mechanics studying the actual characteristics of dense vapors, supercritical flows and compressible two-phase flows, namely whereby the thermodynamic behavior of the fluid differs considerably from that of a perfect gas.
