Abstract

Laser-induced fluorescence (LIF) has been previously used in various forms to characterize droplets in a spray, according to either size or temperature. A rigorous examination is presented of the LIF signal obtained when a water droplet seeded by Rhodamine 6G passes through one or two highly focused laser beams, i.e., with a beam waist of the order of the droplet diameter or smaller. The calculations are performed with a fluorescence model based on the generalized Lorenz–Mie theory and on ray tracing methods, assuming that the droplet is spherical and nonabsorbing. A parametric study reveals a size dependent signal as the droplet passes through the focused beam(s). The observed signal features suggest several avenues for the use of LIF scattering for size and velocity measurements of individual droplets.

© 2010 Optical Society of America

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References

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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef] [PubMed]

2009 (1)

B. Frackowiak, A. Strzelecki, and G. Lavergne, Exp. Fluids 46, 671 (2009).
[CrossRef]

2006 (1)

C. Maqua, G. Castanet, N. Doué, G. Lavergne, and F. Lemoine, Exp. Fluids 40, 786 (2006)
[CrossRef]

2005 (1)

G. Castanet, M. Lebouché, and F. Lemoine, Int. J. Heat Mass Transfer 48, 3261 (2005)
[CrossRef]

2003 (1)

R. Domann and Y. Hardalupas, Part. Part. Syst. Charact. 20, 209 (2003)
[CrossRef]

2002 (1)

2001 (1)

L. Méès, G. Gouesbet, and G. Gréhan, Opt. Commun. 199, 33 (2001)
[CrossRef]

Castanet, G.

C. Maqua, G. Castanet, N. Doué, G. Lavergne, and F. Lemoine, Exp. Fluids 40, 786 (2006)
[CrossRef]

G. Castanet, M. Lebouché, and F. Lemoine, Int. J. Heat Mass Transfer 48, 3261 (2005)
[CrossRef]

Damaschke, N.

Domann, R.

R. Domann and Y. Hardalupas, Part. Part. Syst. Charact. 20, 209 (2003)
[CrossRef]

Doué, N.

C. Maqua, G. Castanet, N. Doué, G. Lavergne, and F. Lemoine, Exp. Fluids 40, 786 (2006)
[CrossRef]

Frackowiak, B.

B. Frackowiak, A. Strzelecki, and G. Lavergne, Exp. Fluids 46, 671 (2009).
[CrossRef]

Gouesbet, G.

L. Méès, G. Gouesbet, and G. Gréhan, Opt. Commun. 199, 33 (2001)
[CrossRef]

Gréhan, G.

L. Méès, G. Gouesbet, and G. Gréhan, Opt. Commun. 199, 33 (2001)
[CrossRef]

Hardalupas, Y.

R. Domann and Y. Hardalupas, Part. Part. Syst. Charact. 20, 209 (2003)
[CrossRef]

Lavergne, G.

B. Frackowiak, A. Strzelecki, and G. Lavergne, Exp. Fluids 46, 671 (2009).
[CrossRef]

C. Maqua, G. Castanet, N. Doué, G. Lavergne, and F. Lemoine, Exp. Fluids 40, 786 (2006)
[CrossRef]

Lebouché, M.

G. Castanet, M. Lebouché, and F. Lemoine, Int. J. Heat Mass Transfer 48, 3261 (2005)
[CrossRef]

Lemoine, F.

C. Maqua, G. Castanet, N. Doué, G. Lavergne, and F. Lemoine, Exp. Fluids 40, 786 (2006)
[CrossRef]

G. Castanet, M. Lebouché, and F. Lemoine, Int. J. Heat Mass Transfer 48, 3261 (2005)
[CrossRef]

Maqua, C.

C. Maqua, G. Castanet, N. Doué, G. Lavergne, and F. Lemoine, Exp. Fluids 40, 786 (2006)
[CrossRef]

Méès, L.

L. Méès, G. Gouesbet, and G. Gréhan, Opt. Commun. 199, 33 (2001)
[CrossRef]

Nobach, H.

Semidetnov, N.

Strzelecki, A.

B. Frackowiak, A. Strzelecki, and G. Lavergne, Exp. Fluids 46, 671 (2009).
[CrossRef]

Tropea, C.

Appl. Opt. (1)

Exp. Fluids (2)

C. Maqua, G. Castanet, N. Doué, G. Lavergne, and F. Lemoine, Exp. Fluids 40, 786 (2006)
[CrossRef]

B. Frackowiak, A. Strzelecki, and G. Lavergne, Exp. Fluids 46, 671 (2009).
[CrossRef]

Int. J. Heat Mass Transfer (1)

G. Castanet, M. Lebouché, and F. Lemoine, Int. J. Heat Mass Transfer 48, 3261 (2005)
[CrossRef]

Opt. Commun. (1)

L. Méès, G. Gouesbet, and G. Gréhan, Opt. Commun. 199, 33 (2001)
[CrossRef]

Part. Part. Syst. Charact. (1)

R. Domann and Y. Hardalupas, Part. Part. Syst. Charact. 20, 209 (2003)
[CrossRef]

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Figures (4)

Fig. 1
Fig. 1

Position of the detector and ray tracing method.

Fig. 2
Fig. 2

Fluorescence intensity profiles for different droplets crossing a single beam (detector positioned on the y axis).

Fig. 3
Fig. 3

Influence of the detector position on the fluorescence intensity profile.

Fig. 4
Fig. 4

Fluorescence intensity profile with two laser beams separated at different distances (detector positioned on the y axis).

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