Second-order boundary corrections to the radial acoustic eigenvalues for a spherical cavity
Keith A. Gillis
We calculated the eigenvalues of the radially-symmetric acoustic modes of a gas-filled, spherical cavity to order (δT/a)2, where δT is the thickness of the thermal boundary layer and a is the radius of the cavity. Our results are consistent with high-precision acoustic measurements made to re-determine the Boltzmann constant.
Second-order boundary corrections to the radial acoustic eigenvalues for a spherical cavity, Metrologia, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=911620
(Accessed November 30, 2021)