Hostname: page-component-6bf8c574d5-j5c6p Total loading time: 0 Render date: 2025-03-10T05:33:51.853Z Has data issue: false hasContentIssue false
  • English
  • Français

Measurements of vibrational and rotational temperaturesof YO molecule by emission and absorption spectroscopy in a solar process

Evidence of a non-equilibrium situation near the vaporizing surface

Published online by Cambridge University Press:  21 March 2007

J. M. Badie ,
L. Cassan  and
B. Granier
J. M. Badie
Affiliation:
PROMES-CNRS, Procédés Matériaux et Énergie Solaire, BP 5, 66125 Font-Romeu, France
L. Cassan
Affiliation:
PROMES-CNRS, Procédés Matériaux et Énergie Solaire, BP 5, 66125 Font-Romeu, France
B. Granier*
Affiliation:
PROMES-CNRS, Procédés Matériaux et Énergie Solaire, BP 5, 66125 Font-Romeu, France
*
[email protected]
Get access

Abstract

We measure by fluorescence emission and absorption spectroscopy rotational and vibrational temperature of YO molecule issuing from a liquid drop of Y2O3 melted at the focus of a solar furnace. Far from the surface and at high pressure these measurements are consistent with the predictions from a fluid dynamic calculation and are believed to give an approximate temperature of the gas phase surrounding the sample. Close to the surface and at low pressure these measurements disagree with the expected surface temperature. This results from the existence of a Knudsen layer near the vaporizing surface that, in these conditions and at our spatial resolution, we can explore, revealing according the gas pressure, quasi equilibrium or non-equilibrium conditions.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 38 , Issue 2 , May 2007 , pp. 177 - 181
Copyright
© EDP Sciences, 2007

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Badie, J.M., Cassan, L., Granier, B., Eur. Phys. J. Appl. Phys. 32, 61 (2005) CrossRef
G. Herzberg, Molecular spectra and molecular structure, Spectra of diatomic molecules (Krieger Publishing Company, Malabar Florida, 1989), Vol. 1
Bernard, A., Gravina, R., Astrophys. J. Suppl. Ser. 52, 443 (1983) CrossRef
Schadee, A., Bull. Astr. Inst. Netherlands 17, 311 (1964)
Badie, J.M., Granier, B., Eur. Phys. J. Appl. Phys. 21, 239 (2003) CrossRef
Badie, J.M., Cassan, L., Granier, B., Eur. Phys. J. Appl. Phys. 29, 111 (2005) CrossRef
Anisimov, S.I., Zhakhovskii, V.V., J.E.T.P. Lett. 57, 99 (1993)
Anisimov, S.I., Dunikov, D.O., Zhakhovskii, V.V., Malyshenko, S.P., J. Chem. Phys. 110, 8722 (1999) CrossRef
Cergnani, C., Fiszdon, W., Frezzoti, A., Phys. Fluids 28, 3237 (1985) CrossRef
Riabov, V.V., Thermophysics, J., Heat Transfer 14, 404 (2000)
Anisimov, S.I., Meyer-Ter-Vhen, J., High Temp.-High Press. 32, 511 (2000) CrossRef
Chermyaninov, I.V., Chernyak, V.G., J. Engineer. Phys. 45, 1370 (1983) CrossRef
Holmberg, C.D., Williams, G.S., Perram, G.P., J. Chem. Phys. 102, 6481 (1995)
J.D. Lambert, in Vibrational and Rotational Relaxation in Gases (Oxford University Press, London, 1977)