Phenomena of a miscible drop through a stratified fluid
Por:
Zarazúa Cruz, A., Echeverría Arjonilla, C., Porta Zepeda, D., Stern Forgach, C.
Publicada:
1 ene 2016
Resumen:
This work describes the dynamics of a drop of benzyl alcohol, (partially miscible in water), as it traverses a stratified fluid formed by two layers, water on the top and saltedwater with a 1.68molar concentration on the bottom. The width and stability of the interface depends on the temperature and on theway the upper layermixes as it is introduced into the container. In this case, the procedure was controlled to produce a stable interface for severalminutes, and to have a repeatable experiment. Thewidth and position of the interface wasmeasured each time through shadowgraphs. The processes that occur during the fall of the drop depend on various parameters like its geometry, the width of the upper layer and the density of the lower layer. First the drop seems to have a free fall. After it enters in contact with the interface, the behavior is similar to a damped harmonic oscillator. The drag force was calculated using models for a rigid sphere and for an ellipsoid with varying dimensions. A comparison between the measured and the calculated values is presented in a graph. © Springer International Publishing Switzerland 2016.
Filiaciones:
Zarazúa Cruz, A.:
Facultad de Ciencias, UNAM, Ciudad Universitaria, Av. Universidad 3000, Circuito Exterior S/N, Delegación Coyoacán, Mexico D.F., Mexico
Echeverría Arjonilla, C.:
Facultad de Ciencias, UNAM, Ciudad Universitaria, Av. Universidad 3000, Circuito Exterior S/N, Delegación Coyoacán, Mexico D.F., Mexico
Porta Zepeda, D.:
Facultad de Ciencias, UNAM, Ciudad Universitaria, Av. Universidad 3000, Circuito Exterior S/N, Delegación Coyoacán, Mexico D.F., Mexico
Stern Forgach, C.:
Facultad de Ciencias, UNAM, Ciudad Universitaria, Av. Universidad 3000, Circuito Exterior S/N, Delegación Coyoacán, Mexico D.F., Mexico
|