Projects per year

### Abstract

Predicting sound wave dispersion in monatomic gases is a fundamental gas flow problem in rarefied gas dynamics. The Navier-Stokes-Fourier model is known to fail where local thermodynamic equilibrium breaks down. Generally, conventional gas flow models involve equations for mass-density without a dissipative mass contribution. In this paper we observe that using a dissipative mass flux contribution as a non-local-equilibrium correction can improve agreement between the continuum equation prediction of sound wave dispersion and experimental data. Two mass dissipation models are investigated: a preliminary model that simply incorporates a diffusive density term in the set of three conservation equations, and another model derived from considering microscopic fluctuations in molecular spatial distributions.

Original language | English |
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Title of host publication | Rarefied gas dynamics |

Editors | D.A Levin, I.J Wysong, A.L Garcia, H Abarbanel |

Publisher | Springer |

Pages | 655-660 |

Number of pages | 5 |

Volume | 1333 |

Edition | 1st |

ISBN (Print) | 9780735408890 |

Publication status | Published - 28 Jun 2011 |

### Publication series

Name | AIP Conference Proceedings |
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Publisher | Springer |

Volume | 1333 |

ISSN (Print) | 0094-243X |

### Keywords

- sound wave propagation
- non-equilibrium gas dynamics
- mass diffusion
- gas kinetic theory
- continuum fluid mechanics

## Fingerprint Dive into the research topics of 'Dissipative mass flux and sound wave propagations in monatomic gases'. Together they form a unique fingerprint.

## Projects

- 1 Finished

## BEYOND NAVIER-STOKES: MEETING THE CHALLENGE OF NON-EQUILIBRIUM GAS DYNAMICS

Reese, J. & McInnes, C.

EPSRC (Engineering and Physical Sciences Research Council)

1/10/05 → 31/01/10

Project: Research

## Cite this

Dadzie, K., & Reese, J. (2011). Dissipative mass flux and sound wave propagations in monatomic gases. In D. A. Levin, I. J. Wysong, A. L. Garcia, & H. Abarbanel (Eds.),

*Rarefied gas dynamics*(1st ed., Vol. 1333, pp. 655-660). (AIP Conference Proceedings; Vol. 1333). Springer.