File:Pendant drop - effect of tension surface and refraction index on the drop shape.png

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Captions

Captions

Pendant drop - effect of tension surface and refraction index on the drop shape

Summary

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Description
Français : Ces quatre images représentent une goutte de polyéthylène glycol (PEG) introduite par une seringue de diamètre 0,5 mm dans un autre milieu : dans l'air (en haut à gauche), dans le polydiméthylsiloxane (PDMS) (en haut à droite), dans l'huile de ricin (en bas à gauche) et dans l'huile de noisette (en bas à droite).

La forme des gouttes est définie par la tension de surface entre les deux composés. La mesure des dimensions de la goutte permet d'estimer la valeur de la tension de surface.

Le contraste entre le contour de la goutte et le reste de l'image est défini par la différence d'indice de réfraction entre les deux milieux.

Images prises au laboratoire Ingénierie des Matériaux Polymères, rattaché à l'Université Jean Monnet de Saint-Etienne.
English: These four images show a drop of polyethylene glycol (PEG) introduced with a 0.5mm diameter syringe in another liquid: air (up-left), polydimethylsiloxane (PDMS) (up-right), castor oil (bottom-left) and hazelnut oil (bottom-right).

The drops' shape is defined by the surface tension between the two compounds. The measurement of the drop dimensions gives an estimation of the surface tension value.

The contrast between the drop contour and the rest of the image is defined by the difference in refraction index between the two compounds.

Images taken at Ingénierie des Matériaux Polymères laboratory, based in Université Jean Monnet in Saint-Etienne.
English: Pendant drop - effect of tension surface and refraction index on the drop shape
Date
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Author DaraDaraDara

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