Risultati di ricerca
In 1893 William Sutherland, an Australian physicist, published a relationship between the dynamic viscosity, , and the absolute temperature, , of an ideal gas. This formula, often called Sutherland's law, is based on kinetic theory of ideal gases and an idealized intermolecular-force potential.
Sutherland’s law, or Sutherland’s formula, is an approximation for how the viscosity of gases depends on the temperature. This law is based on an idealized intermolecular-force potential and reads ( Ref. 5 )
For air a 0 =1.488×10 −5, a 1 =5, a 2 =5 over 79–1845 K. Gupta et al. [178] in fact used the Sutherland law (A.33) and its counterpart for thermal conductivity (A.35) as a reference for comparisons of more exact formulations along with their own for high-temperature chemically reacting air and demonstrated a relative change factor ...
Sutherland's viscosity law resulted from a kinetic theory by Sutherland (1893) using an idealized intermolecular-force potential. The formula is specified using two or three coefficients. Sutherland's law with two coefficients has the form
Sutherland's formula can be used to derive the dynamic viscosity of an ideal gas as a function of the temperature. The dynamic viscosity equals the product of the sum of Sutherland's constant and the reference temperature divided by the sum of Sutherland's constant and the temperature, the reference viscosity and the ratio to the 3/2 power of ...
7 mag 2021 · For air, D. M. Sutherland provides an equation for the dependence on temperature T : mu = mu0 * ( (T / T0)^1.5) * ( (T0 + 198.72) / (T + 198.72)) where mu0 and T0 are reference values given at sea level stanfard conditions. The temperature is specified in degrees Rankine : mu0 = 3.62 x 10^-7 lb-sec/ft^2. T0 = 518.7 R.
21 set 2020 · Sutherland's Law seems to be a fairly well-accepted relationship between dynamic viscosity and temperature and was originally created to work for ideal gases, though it is often extended to be used for atmospheric air.
