World Environmental and Water Resources Congress 2018
Experimental Investigation of Air-Water Interactions during Rapid Filling Process in an Urban Stormwater System Model
Publication: World Environmental and Water Resources Congress 2018: Hydraulics and Waterways, Water Distribution Systems Analysis, and Smart Water
ABSTRACT
The influence of air phase on the flow behavior in urban stormwater systems was experimentally assessed in a physical model, which reproduces a long section of a stormwater system implemented in 2008, in Porto Alegre (Brazil). A severe structural failure has occurred in this stormwater system in 2013 and has motivated the physical model set up. All geometric singularities of the actual stormwater system (e.g. sharp bends, drop sections) were represented in the physical model. The geometric scale factor adopted is 1:15, resulting in a model length of 30 m and variable height (16 cm–42 cm) and width (20 cm–50 cm). The experimental procedure consisted of establishing steady flows and then mimicking the unsteady stages of the filling process by quickly opening a ball valve to allow further inflow. Varying degrees of ventilation were enabled by using various orifices opened in the upstream section of the apparatus. During the experimental runs, the inflow discharge was measured by electromagnetic flowmeters, pressure data was acquired using ten piezo-resistive transducers spread in various point of the model. Air pressurization is noticed immediately in the whole system, and ventilation geometry is linked to air pressurization magnitude.
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Information & Authors
Information
Published In
World Environmental and Water Resources Congress 2018: Hydraulics and Waterways, Water Distribution Systems Analysis, and Smart Water
Pages: 222 - 232
Editor: Sri Kamojjala, Las Vegas Valley Water District
ISBN (Online): 978-0-7844-8142-4
Copyright
© 2018 American Society of Civil Engineers.
History
Published online: May 31, 2018
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