Is it possible to determine gas viscosity?
Gas viscosity can be measured using the capillary method or the transient flow method among others. The CVI method determines the viscosity of gas using the same oscillating piston technology used to measure liquids. The method involves introducing a small sample of gas into the measurement chamber and acclimatizing the sample to the required temperature and pressures for testing. Two electromagnetic coils outside the measurement chamber drive a piston through the gas at a constant force. The travel time of the piston is used to produce a highly accurate measurement of the gas viscosity. It is important to remember that unlike a liquid, gas viscosity increases as temperature increases.
