A compact curved vibrating wire technique for measurement of hydrogen gas viscosity

• Published in: Experimental thermal and fluid science 2013-05, Vol.47, p.1-5
• Main Authors: Yusibani, E., Woodfield, P.L., Shinzato, K., Takata, Y., Kohno, M.
• Format: Article
• Language: English
• Subjects: Curve Vibrating wire; Curved; Deviation; Exact sciences and technology; Gas viscosity; Helium; Hydrogen; Magnetic fields; Mathematical analysis; Nitrogen; Oscillations; Physics; Physics of gases; Physics of gases, plasmas and electric discharges; Viscosity; Viscosity, diffusion and thermal conductivity; Wire
• ISSN: 0894-1777; 1879-2286
• DOI: 10.1016/j.expthermflusci.2012.11.008

► New hydrogen viscosity data for high-temperature and high-pressure conditions are desirable. ► The high temperatures and high pressures present challenges for experimentation. ► A compact and robust technique. ► Application of the curved wire technique to the measurement of hydrogen gas viscosity. Studies with the view to application of a curved vibrating wire method to measure hydrogen gas viscosity have been done. A fine tungsten wire with a nominal diameter of 50μm is bent into a semi-circular shape and arranged symmetrically in a magnetic field. The frequency domain response for forced oscillation of the wire is used for calculating the viscosity. Argon, nitrogen, helium and hydrogen viscosities have been measured at room temperature up to 0.7MPa. The deviations with respect to existing equations suggest that with more refinements it may be possible to take gas viscosity measurements with a precision of less than 1%.