INVESTIGADORES
BARRANTES Francisco Jose
artículos
Título:
Mixing liquids in microseconds.
Autor/es:
REGENFUSS P; CLEGG RM; FULWYLER MJ; BARRANTES FJ; JOVIN TM
Revista:
REVIEW OF SCIENTIFIC INSTRUMENTS
Editorial:
AMER INST PHYSICS
Referencias:
Lugar: New York; Año: 1985 vol. 56 p. 283 - 290
ISSN:
0034-6748
Resumen:
An instrument is described in which two solutions can be homogeneously
mixed within several microseconds. The liquids flow separately through
two coaxial capillaries with conical tips and then simultaneously around
a sphere (50?100 μ in diameter) which has been positioned close to the
end of the outer tip. The liquids flow with velocities of ∼100 m/s
through the small passages (∼5 μ wide) separating the sphere and the
wall of the outer capillary and mix in the turbulent liquid flow behind
the sphere. The mixed liquids are then ejected as a narrow liquid jet
for observation. Design characteristics and construction techniques are
presented along with a discussion of the properties of the turbulent
flow field and estimates of the expected practically realizable mixing
times. The experimentally determined speed of mixing indicates that we
have nearly achieved the proposed lower limits of the mixing time.