ZIB

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

Influence of velocity slip and temperature difference on internal relaxation in diatomic–monatomic mixture free-jet expansion (1991)

Chidiac, C. ; Perrin, M. Y. ; Martin, J. P.

New York, NY : American Institute of Physics (AIP)

Physics of Fluids 3 (1991), S. 1991-1999

add to mindlist on the mindlist

Details

ISSN: 1089-7666

Source: AIP Digital Archive

Topics: Physics

Notes: The supersonic expansion of a mixture of a heavy gas and a light gas may result in a velocity slip and a temperature difference between light and heavy species. The purpose of this paper is to study the influence of these phenomena on the relaxation of internal degrees of freedom which takes place when one of the gases is a diatomic one. The model presented is based on the Wang–Chang–Uhlenbeck theory and on the assumption of a two-velocity and two-temperature model to represent the velocity distributions. The model incorporates the internal degrees of freedom of the diatomic molecule and can be used to study the effect of velocity slip and temperature difference on the mechanism of internal energy transfer involved in a free-jet expansion. The hydrodynamical equations and the master kinetic equations are derived. The formalism is applied to the system I2–He, assuming that a rotational temperature and a relaxation equation to describe the rotational relaxation can be defined. The unexpected high rotational temperatures observed experimentally in I2–He expansions presenting a velocity slip are reproduced.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.857931

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Counter jet stagnation flows (1991)

Rolon, J. C. ; Veynante, D. ; Martin, J. P. ; [et al.]

Springer

Experiments in fluids 11 (1991), S. 313-324

add to mindlist on the mindlist

Details

ISSN: 1432-1114

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Abstract The present paper concerns the stagnation flow produced by counter flowing air jets. Little experimental information exists on such flows in spite of their extensive employment in the theoretical treatment of diffusion flames. To remedy this situation, laser-Doppler measurements were performed to quantify the entire flow field. The experiments are described and the results of the velocity measurements presented. Differences between the investigated flow field and the ideal flow field, employed in theoretical studies, are pointed out.