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Transverse Mixing in an Unregulated Northern River
Publisher: American Society of Civil Engineers
Abstract: Transverse mixing in an unregulated northern river in Canada was studied in different discharge conditions with and without ice cover. The distribution of cumulative discharge was constructed on the basis of river ...
Trajectories of Air-Water Bubbly Jets in Crossflows
Publisher: American Society of Civil Engineers
Abstract: Trajectories of bubbly jets in crossflows by injecting air-water mixtures vertically through a circular nozzle were experimentally studied. Bubbles separated from the water jets in strong crossflow, similarly to that of ...
Near-Field Mixing Downstream of a Multiport Diffuser in a Shallow River
Publisher: American Society of Civil Engineers
Abstract: Near-field mixing downstream of a multiport diffuser in a wide shallow river was studied with a field dye test. Dye concentrations at different depths and lateral locations were measured. The near-field mixing was analyzed ...
Mass Transfer of Hydrogen Sulfide at Turbulent Water Surface by Falling Drops or a Single Jet
Publisher: American Society of Civil Engineers
Abstract: Hydrogen sulfide (H2S) is a primary cause of odor and corrosion in sewer systems. In drop structures, falling wastewater impinges the surface of bottom water pool as a jet or numerous drops, triggering a high level of ...
Mass Transfer of H2S and O2 in Falling Sewage: Contributions via Droplets, Jet, and Bottom Pool
Publisher: American Society of Civil Engineers
Abstract: In urban drainage systems, falling sewage in drop structures expedites the mass transfer of hydrogen sulfide (H2S) and oxygen (O2). This process is important for sewer odor and corrosion control; however, direct experiments ...
Mean and Turbulent Bubble Velocities in Free Hydraulic Jumps for Small to Intermediate Froude Numbers
Publisher: American Society of Civil Engineers
Abstract: Bubble characteristics in free hydraulic jumps for inflow Froude numbers ranging from 2.0 to 6.7 were measured using a single-tip optical probe, with a focus on mean and turbulent bubble velocities. It was found that the ...
Emission of Hydrogen Sulfide from Falling Droplets in Sewage Drop Structures
Publisher: ASCE
Abstract: Hydrogen sulfide (H2S) is the primary cause of odor and corrosion in sewer systems. When wastewater breaks up into small droplets in drop structures, the emission of H2S is expected to be significantly enhanced relative ...
Air Movement Induced by Water Flow with a Hydraulic Jump in Changing Slope Pipes
Publisher: American Society of Civil Engineers
Flow Structures in the Vicinity of a Submerged Boulder within a Boulder Array
Publisher: American Society of Civil Engineers
Use of Air Circulation Pipes in Deep Dropshafts for Reducing Air Induction into Sanitary Sewers
Publisher: American Society of Civil Engineers