Alternatively, these sensors can be driven in combination with other ultrasonic techniques to simultaneously determine the density, speed of sound and viscosity of samples.
The importance of viscosity in sound production by vortex is confirmed, and the possible physical reason for sound amplification at large wavenumber is discussed.
Moreover, density, kinematic viscosity and sound velocity were determined for the top and bottom phases.
Numerical examples have been given to show the effect of viscosity on sound radiation.
With the aim of resolving some questions arising from previous studies by Morfey, Kempton, Hardin, and Kambe and Minota, the effects of viscosity on aerodynamic sound generation by unheated, low Mach number flow are investigated theoretically.
We consider a compressible barotropic fluid of constant viscosity, ζ∗, and sound velocity, α 0 ∗, sandwiched between two semi-infinite elastic media, |x∗| ≥ a∗, in which the density is uniformly ρ s ∗ and the P- and S-wave velocities are respectively α s ∗ = λ s ∗ + 2 μ s ∗ / ρ s ∗ and β s ∗ = μ s ∗ / ρ s ∗ ( λ s ∗ and μ s ∗ represent the Lamé constants).
Topics: density, viscosity, diffusion, thermal properties, sound, light, evaporation, and surface tension.
This formulation is shown to avoid the unnecessary bulk viscosity and enhance the sound-prediction capability of the model.
Densities, viscosities and speeds of sound of the binary systems of isopentyl acetate with chlorobenzene, bromobenzene and fluorobenzene have been measured as a function of composition at 303.15 and 313.15 K.
We also describe the possibility of determining the oil viscosity from measurements of the sound absorption made with the same ultrasonic cell.
