For saturated humid air at 35 degrees C, a linear concentration-weighted combination of viscosities differs from our nonlinear equation by 4.9, 2.1, and 1.7% at barometric pressures of 32, 83, and 100 kPa, respectively. The kinematic viscosity of air at this state is (a) 0.
All other differences are less than 0.38%. Solution for The dynamic viscosity of air at 20☌ and 200 kPa is 1.83 × 105 kg/ms. Many everyday fluids have viscosities between 0. The maximum difference between published and calculated values is 1.3% for 10% CO2 in N2. Even in relation to high-viscosity fluids, this unit is most usually encountered as the centipoise (cP), which is 0.01 poise. We also compare a nonlinear equation for calculating the viscosities of mixtures of gases with published measured viscosities of dry air, humid air, and He-O2 and N2-CO2 mixtures.
Our linear equations for pure gas viscosities yield standard errors less than 0.35 microP. We verify the accuracy of the extrapolation equation by comparison with published data. We derive linear equations to approximate the viscosities of O2, N2, CO2, H2O, He, N2O, and Ar for temperatures between 20 and 40 degrees C by using published viscosity data and a nonlinear extrapolation equation. Dynamic characteristics of pneumotachographs, pressure transducers, and mass spectrometers are also viscosity dependent. The steady-state sensitivity of resistance pneumotachographs is proportional to viscosity. 3 which shows that at a temperature of 40C the viscosity increases slightly with temperature but the humidity has no significant effect (the curves are.
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