NON-LINEAR NON EQUILIBRIUM FLOWS.
Abstract
The first part of the report deals with the non-linear acoustics for singly reacting media. The non-linear wave equation is derived to within a small perturbation approximation and its physical implications are discussed. The type and nature of additional simplifications which can be obtained under particular hypothesis on the equilibrium thermodynamic properties of the medium and/or the kinetics of the process are analized and relevant analogies are established and commented upon. In the second part the effects of the multiplicity of principal relaxation frequencies are considered. By means of the spectral decomposition of the relaxation matrix the following result is proved: the features of any linearized non-equilibrium flow field do not depend on the number of independent rate processes taking place in the gas mixture but, rather, on the number of distinct principal relaxation frequencies. The analogies following as a corollary of this statement are pointed out and discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1969
- Accession Number
- AD0693334
Entities
People
- L. G. Napolitano
Organizations
- University of Naples Federico II