Author
James William Lewis
Bio: James William Lewis is an academic researcher. The author has an hindex of 1, co-authored 1 publications receiving 25 citations.
Papers
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Dissertation•
01 Jan 2011
25 citations
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Journal Article•
TL;DR: In this article, a dynamic transient model was developed to simulate the transition from gravity flow to pressurized flow that would occur during a storm event, and the model is able to simulate pressurization with pipe-filling bore or gradual flow regime transition.
Abstract: The potential for hydraulic transients in the West Area Combined Sewer Overflow Tunnel System of the City of Atlanta was investigated by numerical modeling. Different design alternatives were evaluated to mitigate pressure oscillations, backflows, and flooding during storm events. A dynamic transient model was developed to simulate the transition from gravity flow to pressurized flow that would occur during a storm event. The model is able to simulate pressurization with pipe-filling bore or gradual-flow regime transition. Numerical results compare well with experimental data on single pipe flows. Following a brief description of the model, the paper discusses the pressure transients simulated during the filling of the tunnels for both the original and improved designs.
57 citations
TL;DR: Geysers are explosive eruptions of air-water mixture from manholes in drainage systems as mentioned in this paper, when the design capacity of storm water drainage systems is exceeded during heavy rainfall, rapid inf...
Abstract: Geysers are explosive eruptions of air-water mixture from manholes in drainage systems. When the design capacity of storm water drainage systems is exceeded during heavy rainfall, rapid inf...
32 citations
TL;DR: Geysers are explosive eruptions of air-water mixture from manholes in drainage systems as mentioned in this paper, when the design capacity of urban storm water drainage systems is exceeded during extreme rainfall.
Abstract: Geysers are explosive eruptions of air-water mixture from manholes in drainage systems. When the design capacity of urban storm water drainage systems is exceeded during extreme rainfall, r...
25 citations
TL;DR: In this paper, a laboratory study on violent geysers in a vertical pipe was conducted, where each geyser produced a few consecutive violent eruptions within a time frame of a few seconds with heights of several feet.
Abstract: This paper reports a laboratory study on violent geysers in a vertical pipe. Each geyser produced consists of a few consecutive violent eruptions within a time frame of a few seconds with heights t...
21 citations
TL;DR: In this paper, the mechanisms that lead to violent eruptions in stormwater and combined sewer systems were described with laboratory observations, and the upper limit of the upper bound was derived.
Abstract: Supported with laboratory observations, this paper describes the mechanisms that lead to violent eruptions in stormwater and combined sewer systems. This paper also derives the upper limit ...
19 citations