U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Second-order boundary corrections to the radial acoustic eigenvalues for a spherical cavity

Published

Author(s)

Keith A. Gillis

Abstract

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.
Citation
Metrologia
Volume
49
Issue
6
Pub Type
Journals

Download Paper

Local Download

Keywords

Boltzmann constant, spherical resonator, speed of sound, second order, radial modes, eigenvalues
Analytical chemistry, Chemical engineering and processing and Metrology

Citation

Gillis, K. (2012), 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 March 6, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created August 17, 2012, Updated February 19, 2017