Sound propagation in a real fluid subject to diffusion

Pallath Chandran*, O. P. Bhutani

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The effects of viscosity, heat conductivity and diffusion on one-dimensional sound waves have been analyzed. The governing equations in the acoustic approximation have been reduced to a wave equation consisting of different order wave operators. The normal mode analysis of this equation has established an increased attenuation of the waves due to the diffusion effect. Furthermore, the operator equation has been subjected to a qualitative analysis, and detailed comments have been made in regard to the stability of motion and the roles played by higher and lower order waves.

Original languageEnglish
Pages (from-to)983-998
Number of pages16
JournalPhysica A: Statistical Mechanics and its Applications
Issue number3
Publication statusPublished - Oct 15 1990

ASJC Scopus subject areas

  • Statistics and Probability
  • Condensed Matter Physics


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