![]() Absolute or Dynamic Viscosity Online ConverterĪir dynamic viscosity at varying temperature and constant pressures (1-10 000 bara, 14.5 - 145 000 psia):Īir kinematic viscosity at varying temperature and constant pressures (1-10 000 bara, 14.5 - 145 000 psia):Īir dynamic and kinematic viscosity at gas-liquid equilibrium pressure:ĭynamic (absolute) and kinematic viscosity of air at 1 atmosphere pressure, at temperatures given as ☏:įor full table with kinematic viscosity - rotate the screen! Temperatureĭynamic (absolute) and kinematic viscosity of air at 1 atmosphere pressure, at temperatures given as ☌:Ĭentipoise, gram/(centimeter second) = poise, kilogram/meter second =newton second/square meter = pascal second, pound/(foot hour) , pound/(foot second), reyn.See also other properties of Air at varying temperature and pressure: Density and specific weight at varying temperature, Density at varying pressure, Diffusion Coefficients for Gases in Air, Prandtl Number, Specific heat at varying temperature and Specific heat at varying pressure, Thermal Conductivity, Thermal Diffusivity, Properties at gas-liquid equilibrium conditions and Air thermophysical properties at standard conditions and Composition and molecular weight,Īs well as dynamic and kinematic viscosity of ammonia, benzene, butane, carbon dioxide, ethane, ethanol, ethylene, methane, methanol, nitrogen, oxygen, propane and water.Īir dynamic and kinematic viscosity at atmospheric pressure and varying temperature: Temperature Choose the actual unit of temperature: While the kinematic viscosity is given as cSt, m 2/s, and ft 2/s The output dynamic viscosity is given as Pa*s, N*s/m 2, cP, mPa*s, lb f*s/ft 2 and lb m/(ft*h), The calculator below can be used to calculate air dynamic or kinematic viscosity at given temperatures and atmospheric pressure. Tabulated values and viscosity units conversion are given below the figures. Absolute or dynamic viscosity is used to calculate Reynold's Number to determine if a fluid flow is laminar, transient or turbulent. If we know the relative humidity instead of T dew, we use P v = RH × E s(T), evaluating E s at the air temperature ( T).The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress.įor further definitions, go to Absolute (dynamic) and kinematic viscosity. If we know the dew point, we use the P v = E s(T dew) equation, evaluating E s at the dew point (T dew). In either case, we use the following polynomial (suggested by EMD International A/S) to calculate E s: There are two ways of calculating P v, depending on whether we know the dew point ( T dew) or the relative humidity ( RH): This calculator uses the previous equation to calculate the density of moist air. R v - Specific gas constant of water vapor ( 461.495 J/(kg K)).R d - Specific gas constant of dry air ( 287.05 J/(kg K)) and.P v - Partial water vapor pressure, in Pa.P d - Partial pressure of dry air, in Pa.We can extend Dalton's law to the density of gas mixtures, such as the mixture of air and vapor (moist air): With partial pressures, we refer to the pressures each gas would exert if it existed alone at the mixture temperature and volume. "The pressure of a gas mixture is equal to the sum of the partial pressures of each gas." To calculate the density of moist air, this calculator uses a model based on Dalton's law for partial pressures, which says:
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