Polynomial Expressions for the Coefficient of Nonlinearity Beta and Beta/(pc5) 1/2 for Fresh Water and Seawater

Abstract

In this technical report, we develop polynomial expressions for the coefficient of nonlinearity beta for both seawater and fresh water. The seawater relations are for salinities of 30-40 ppt, temperatures of 0-40 C, and pressures of 1-800 bars absolute. The fresh water relations are for temperatures of 0-90 C and pressures of 1-1000 bars absolute. Also presented are polynomial expressions. Which arises in nonlinear geometrical acoustics. The precision of the fits of the polynomials to the underlying data is better than 1 ppt in all cases. However, the uncertainty in the seawater beta relation is + or - 3% for realistic ocean temperatures and pressures. An uncertainty estimate was not obtained for the fresh water beta relation.

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Document Details

Document Type
Technical Report
Publication Date
Nov 05, 1991
Accession Number
ADA253384

Entities

People

  • C. L. Morfey
  • Frederick D. Cotaras

Organizations

  • University of Texas at Austin

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Properties
  • Acoustics
  • Coefficients
  • Engineering
  • Equations
  • Fluids
  • Fresh Water
  • High Pressure
  • High Temperature
  • Materials Science
  • Mechanical Engineering
  • Military Research
  • Physics
  • Polynomials
  • Salinity
  • Uncertainty
  • Water

Readers

  • Graph Algorithms and Convex Optimization.
  • Mechanical Engineering/Mechanics of Materials.
  • Oceanography.