Hydraulics & Waterways

Oral

394506 - Dynamic mesh method to represent manhole cover motion during rapid filling processes in stormwater systems

Monday, June 4
10:30 AM - 12:00 PM
Location: Regency Room

Stormwater system under rapid filling conditions may present various operational problems, some of which related to air-water interactions. In some cases, water level in manholes and shaft may vary abruptly, creating significant air displacement. In many circumstances, manhole cover ventilation is very limited, and the water level variation also leads to the pressurization of the air underneath manhole covers. Manhole cover displacement may result from these events, and unfortunately there is still limited knowledge on how to properly represent air pressurization in manholes accounting for the cover motion. The current research implements CFD simulation of the air pressurization and releasing by considering manhole cover motion with OpenFOAM-extend. With respect to the existing dynamic mesh methods in OpenFOAM-extend, they can only simulate either predetermined boundary motion with topological changes or force induced boundary motion without topological changes. This research focuses on developing a new dynamic mesh method that is applicable for the current research topic by combining the two mentioned dynamic mesh methods. Ultimately, it is intended to simulate the entire process of air pressurization build-up and release in the manhole and investigate the flow characteristics during such events.

Jue Wang

Graduate Research Assistant
Auburn University

Jue Wang, M.S., Ph.D. student at Auburn University
Graduate Research Assistant at Department of Civil Engineering, Auburn University
Researches focus on the description of multiphase flows applying CFD tools such as OpenFOAM. Applications include the settling of particles in sediment basins, sediment resuspension and air-water motion in closed conduits.

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Jose Goes Vasconcelos, PhD

Associate Professor
Auburn University

PhD in Environmental Engineering - University of Michigan, 2005
MSc in Environmental Technology and Water Resources - University of Brasilia, 2000
BS in Civil Engineering - University of Brasilia, 1995
Currently Associate Professor at Auburn University
Member of Editorial Board of the ASCE Journal of Hydraulic Engineering and CHI Journal of Water Management and Modeling
Chair of the ASCE EWRI Hydraulic Structures Committee
Chair of the ASCE EWRI Task Committee in Two-Phase Flow In Urban Water Systems
Member of the ASCE EWRI Computational Hydraulics Committee
Advisor to the Engineers Without Borders Student Chapter at Auburn University

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Xiaofeng Liu, PhD, PE

Assistant Professor
Pennsylvania State University

Xiaofeng Liu got his bachelor's degree in Hydraulic Engineering from Tsinghua University, China and master's degree in Environmental Science from Peking University, China. He then got his PhD at University of Illinois at Urbana-Champaign (UIUC).He is now an assistant professor at Penn State University. His research area includes computational hydraulics, sediment transport, and erosion.

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