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Liquid Water—Acoustic Properties: Absorption and Relaxation

  • Charles M. DavisJr.
  • Jacek Jarzynski
Part of the Water book series (WCT, volume 1)

Abstract

In general, liquids differ from solids primarily in their ability to flow. While in the process of flowing, however, a liquid is not in thermodynamic equilibrium. On a miscoscopic basis, for flow to occur, the molecules must rearrange relative to each other. In thermodynamic equilibrium, a liquid is completely characterized by a small number of state variables (e.g., the internal energy, volume, number of moles, total magnetic and electric moments, etc.). When a system initially in equilibrium is perturbed into a nonequilibrium state, the method by which equilibrium is restored is known as a relaxation process. Any such nonequilibrium state requires that parameters in addition to the state variables be specified for a complete characterization. In the present chapter, we will be concerned with structural relaxation. This is the process by which the molecules of a system “flow” from a nonequilibrium configuration to a new equilibrium configuration.

Keywords

Sound Absorption Ultrasonic Pulse Ultrasonic Absorption Structural Relaxation Time Volume Viscosity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1972

Authors and Affiliations

  • Charles M. DavisJr.
    • 1
  • Jacek Jarzynski
    • 1
  1. 1.Naval Research LaboratoryUSA

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