| Abstract: | The decay of oscillation of a liquid column in a manometer has been studied. Measured values of the damping coefficients in laminar conditions agree well with previous data. The transition between turbulent and laminar damping has also been measured. For transition to fully developed turbulent flow, the critical Reynolds number is a function only of the Valensi number. In situations where turbulence exists at the ends of the liquid column but laminar conditions persist in the main section, the transition Reynolds number and damping exponent are functions of frequency and kinematic viscosity as well as Valensi number. |
