Abstract: A physical model study was conducted to investigate the flow regimes in a plunging-type dropshaft under the conditions of no air supply and limited air supply. When the top of the dropshaft is sealed, three flow regimes ...

Abstract: Withdrawal of water-capped viscoplastic fluid was investigated using laboratory experimentation and numerical modeling. The viscoplastic fluid was modeled using a Laponite suspension, which was withdrawn by a vertical pipe ...

Abstract: Modeling air movement in sewer systems is important because of its importance in addressing sewer odor issues and pipe corrosion. In this study, a steady-state model was developed for simulating the air pressure and movement ...

Abstract: Plunging-flow dropshafts can entrain a large amount of air into sewer systems, pressurize downstream airspace, and cause potential sewer odor issues. In this study, a new design for a plunging-flow dropshaft is investigated ...

Abstract: An analytical solution for groundwater flow through a circular tunnel in anisotropic soils is derived based on conformal mapping and can be used to calculate the water flow rate into the tunnel and predict the pore water ...

Abstract: Understanding hydrogen sulfide (H2S) emission into sewer air space and the rate of ventilation to the atmosphere is important in preventing/mitigating odor and corrosion problems in sewer systems. This study presents the ...

Abstract: This paper theoretically analyzed the design and operating parameters of a pipe-shaped air-cushion surge chamber (PS-ACSC). A mathematical model for a small load disturbance (SLD) in a hydropower plant containing the PS-ACSC ...