Vaporization of an Equivalent Pastille

Abstract

On examine la réponse dynamique d'une goutte en évaporation en forme de pastille sous l'effet de petites oscillations acoustiques. La pastille est alimentée de façon continue avec un coefficient d'échange thermique h et il est tenu compte des effets de la convection de la chaleur et de la conduction sur le facteur de réponse en fréquence du système et sur le champ thermique dans la gouttelette. L'effet du coefficient d'échange thermique h est étudié.Mots clés : pastille, évaporation, oscillations harmoniques, facteur de réponse, perturbations de température Abstract: The dynamic response of a drop-shaped evaporative drop under the effect of small acoustic oscillations is examined. The pellet is fed continuously with a heat exchange coefficient h and the effects of convection of heat and conduction on the frequency response factor of the system and on the thermal field in the droplet are taken into account. The effect of the heat exchange coefficient h is studied.

An approximate analytical model for the frequency response of evaporating droplets under a mixed feeding regime

“…Consequently, the results concerning the response factor curves in these two extreme regimes can be deduced as limiting cases from those of the present generalized injection regime. This kind of generalization has also been highlighted in a recent published paper (see [27]), where the mixed feeding regime was applied to a pastille-shaped droplet. Secondly, when the value of the heat transfer coefficient is fixed at one (h = 1), the corresponding response factor curves show intriguing fluctuations in their profiles, as it can be observed on Figures 3(c1), 3(c2) and 3(c3).…”