Accession Number:

AD1120168

Title:

Bubbling Underwater to Breakup Biofilms and Lift Early Settlers (BUBBLES)

Descriptive Note:

[Technical Report, Final Report]

Corporate Author:

TRUSTEES OF BOSTON UNIVERSITY

Personal Author(s):

Report Date:

2020-12-29

Pagination or Media Count:

13

Abstract:

The project investigates the mechanisms by which a stream of underwater bubbles that flow past a surface can prevent biofouling accumulation. Combining high-speed experimental imaging and multiphase numerical simulations, the shear stresses and cleaning efficiency of isolated rising bubbles was deduced. In addition, the dynamics of direct contact of bubble with submerged surface were related to the properties of the surface, bubble, and surrounding liquid. Finally, extending approaches used in integral plume theory and larval settlement, the effects of flowrate on bubble lateral motion and lull periods were related to spatial variation in macrofouling observed in field experiments. The project helped train a postdoctoral researcher, three doctoral students, and two undergraduate students.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

[A, Approved For Public Release]