The gravity-driven migration of N ≥ 1 bubble(s) near a free surface is addressed within the assumption of negligible inertial effects by solving a boundary-integral equation at each time and assuming axisymmetric free surface and bubble(s) with axis of revolution aligned with the gravity. The implemented boundary element method permits one to accurately invert at a reasonable cpu time cost the ...

[1] It is well known that brine drainage from growing sea ice has a controlling influence on its mechanical, electromagnetic, biological and transport properties, and hence upon the buoyancy forcing and ecology in the polar oceans. When the ice has exceeded a critical thickness the drainage process is dominated by brine channels: liquid conduits extending through the ice. We describe a theoreti...

Fecal contamination and organic pollution of an agricultural drainage in northeast Indiana was high. Bacterial counts (total coliform, TC; fecal coliform, FC; and fecal streptococcus, FS) and biochemical oxygen demand (BOD) were used to assess waste concentrations. Coliform counts indicated that sections of the drainage receiving septic effluent had waste concentrations far in excess of public ...

The lubrication form of the equations governing the flow of a thin liquid film on a horizontal right circular cylinder is derived. The equations are discretized and solved numerically using an alternating-direction implicit algorithm. Simulations demonstrate that the transition from a uniform coating to a final configuration of distinct drops follows a similar evolution for a wide range of cyli...

A 2008 report by Das et al. documented the rapid drainage during summer 2006 of a supra-glacial lake, of approximately 44× 106 cubic meters, into the Greenland Ice Sheet over a time scale moderately longer than 1 hour. The lake had been instrumented to record the time-dependent fall of water level, and the uplift of the ice nearby. Liquid water, denser than ice, was presumed to have descended t...

We report an experimental study on shearing a monolayer of monodisperse bubbles floating on liquid in a narrow-gap Couette device. The bubbles in such a "bubble raft" coalesce only if the shear rate exceeds a threshold value. This is in contrast to the conventional wisdom that bubbles and drops coalesce for gentler collisions, at shear rates below a critical value. Furthermore, the threshold sh...

Several methods of treatment for plunging ranulas have been described in the literature, such as: surgical treatment including the excision of the sublingual gland followed by transoral drainage of the pluging ranula, needle aspiration, excision of the ranula, cryosurgery and CO(2) laser excision. Marsupialization and micro-marsupialisation can be also recommended primarily to treat oral ranula...

OBJECTIVE To evaluate whether hemostasis with eletrocauterization in comparison with Floseal((r)) leads to different bleeding rates during total knee arthroplasty. METHODS A COMPARATIVE STUDY WAS PERFORMED BETWEEN TWO GROUPS: group with ten consecutive total knee arthroplasties with Floseal((r)) used as hemostatic method and control group with ten consecutive total knee arthroplasties with el...

Pesticide use in agriculture can cause undesirable effects to the natural environment as well as to humans. A field trial to determine residues of 2,4-D and paraquat in the ricefield soil and surface water of the drainage canals in the Kerian district of Perak, Malaysia, was conducted during 2006/2007. Analyses of 2,4-D and paraquat in the soil and water samples were carried out using a high pe...

In the present  paper Electrical Conductivity (EC) of Colloidal Gas Aphron (CGA) suspensions was measured for anionic and cationic surfactants (Sodium Dodecyl Sulfate (SDS) and Tetradecyl Trimethyl Ammonium Bromide (TTAB)). Experiments were made for different concentrations of SDS (6, 8.1, 10 mM) and TTAB (2, 3.51, 5 mM). CGA drainage behavior was observed and measured using 1 liter measuri...