Transient gratings generated by particulate suspensions: the uniformly irradiated sphere and the point source.
J Chem Phys
; 124(3): 034905, 2006 Jan 21.
Article
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| MEDLINE
| ID: mdl-16438612
ABSTRACT
Expressions for the time dependence of the state variables in a transient grating experiment carried out on suspensions of particles can be determined by integration over space of the solutions for the temperature and photoacoustic pressure for a single particle. The method relies on independent computation of the thermal and acoustic modes of wave motion which are combined to give the temperature, pressure, and density in the grating as a function of time. Calculations are given for the uniformly irradiated droplet and the point source, the latter including the effects of a temperature-dependent thermal expansion coefficient. Transient grating experiments are reported in colloidal Pt that show features described in the calculation.
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01-internacional
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MEDLINE
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En
Revista:
J Chem Phys
Año:
2006
Tipo del documento:
Article
País de afiliación:
Estados Unidos