Opposed bubbly jets at different impact angles: jet structure and bubble properties
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10.1016/j.ijmultiphaseflow.2010.03.009
Inclou dades d'ús des de 2022
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hdl:2117/10296
Tipus de documentArticle
Data publicació2010-08
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Abstract
The structure of two colliding water jets containing small gas bubbles is studied experimentally. The
effects of the separation distance between jets, as well as the orientation angle, on the spatial distribution
of bubbles have been considered. Results on the global structure of the final jet and bubble properties
have been obtained using a high-speed video camera, and measurements of the positions of coalescence
events are presented. Jets are introduced through inclined pipes (with a diameter of 0.7 mm) into a large
water tank to avoid wall effects. Inclination angle has been changed from 0 to 45 with respect to the
horizontal, resulting in a 0 up to 90 impact angle between jets. Generation of bubbles is controlled
by a T-junction device where a regular slug-flow is created prior to injection. Bubble sizes have been measured,
and a mean diameter of around 1 mm has been obtained using high values of the liquid flow rate.
In the studied range of separation distances between the bubbly jets, a more homogeneous dispersion of
bubbles is created as the distance between jets is decreased and the momentum flux of each jet is
increased. Higher numbers of coalescences are observed when using smaller distance between jets,
and the obtained measurements revealed that the number of bubble coalescence events is reduced significantly
using high values of liquid flow rates.
CitacióSuñol, F.; González, R. Opposed bubbly jets at different impact angles: jet structure and bubble properties. "International journal of multiphase flow", Agost 2010, vol. 36, núm. 8, p. 682-689.
ISSN0301-9322
Versió de l'editorhttp://linkinghub.elsevier.com/retrieve/pii/S0301932210000947
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