3D Numerical Modeling of the Turbulent Flow in Hydraulic Structures
Yang, Xuejun
This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.
Permalink
https://hdl.handle.net/2142/83332
Description
Title
3D Numerical Modeling of the Turbulent Flow in Hydraulic Structures
Author(s)
Yang, Xuejun
Issue Date
2007
Doctoral Committee Chair(s)
Garcia, Marcelo H.
Department of Study
Civil Engineering
Discipline
Civil Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Civil
Language
eng
Abstract
Prototype-scale hydrodynamic modelings were first conducted to evaluate the structure design of the Calumet High-Level Influent Pumping Station (CHLIPS). The complex geometries were discretized into unstructured tetrahedral meshes. A FEM flow solver was used with the k-epsilon model as the turbulence closure. The rigid-lid assumption was employed to simplify the modeling of the water surface. The MPI parallization of the code and the utilization of high-performance supercomputers made the resulting intensive computation feasible. The flow in CHLIPS's pump forebay was first evaluated to identify undesirable flow behaviors which could endanger the station's normal operation. Geometrical modifications were correspondingly recommended to improve the design. The modeling for the entire CHLIPS structure was then focused on evaluating the balance of flow distribution among the screen channels and the wet wells. The flow solver was further enhanced to provide the capability of capturing oscillating free surfaces. Level set method was coupled with the k-epsilon model to track the evolution of the water surface. Numerical algorithms were devised to deal with problems caused by the significant differences in fluid properties between water and air. The model was finally applied to study the flow in the pump forebay of the CHLIPS physical model. A comparison between numerical results and experimental measurements shows the flow characteristics are satisfactorily predicted by the model.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.
