Modification of a computational fluid dynamics model (ansys-fluent) for the purpose of river flow and sediment transport modeling
by
Ekmekçi, Hüseyin Burak, author.
Title
:
Modification of a computational fluid dynamics model (ansys-fluent) for the purpose of river flow and sediment transport modeling
Author
:
Ekmekçi, Hüseyin Burak, author.
Personal Author
:
Ekmekçi, Hüseyin Burak, author.
Physical Description
:
xiv, 100 leaves: color illustraltions.+ 1 computer laser optical disc.
Abstract
:
Precise estimation of the sediment transport and settling velocity of particle in turbulent flows is required for many engineering applications including modeling of the transport of suspended sediments and the transport of particle pollutants. This study presents an approach for modification of an existing CFD Model for sediment transport in turbulent flow based on field measurements. In the first part, synchronized 3-D velocity and temperature time series were monitored at Büyük Menderes River in Turkey where the data were utilized to characterize the turbulence characteristics and model particle – fluid interaction. Sieve and hydrometer analysis were obtained from earlier studies to understand and modify sediment transport under different conditions via ANSYS Fluent programme. The second part of the study involved numerical modeling of hydrodynamics via 3D CFD model in the selected portion of a river body through use of field measurements conducted at the study site. The k-ω turbulence model found to be the best suited when such flow around a structure as piers or flow through a water intake is considered. Effect of particle size, concentration and modeling approach for particle motion are also investigated and Rossin Rammler Logarithmic Distribution and multiphase modeling approach was the most appropriate methods. This study involved development of an approach to modify drag force on sediment particles using turbulence characteristics in the Fluent solver as well.
Subject Term
:
Computational fluid dynamics.
Sediment transport -- Mathematical models.
Stream measurements.
Added Author
:
Elçi, Şebnem
Added Corporate Author
:
İzmir Institute of Technology. Civil Engineering.
Added Uniform Title
:
Thesis (Master)--İzmir Institute of Technology: Civil Engineering.
İzmir Institute of Technology: Civil Engineering--Thesis (Master).
Electronic Access
:
Library | Material Type | Item Barcode | Shelf Number | Status |
---|
IYTE Library | Thesis | T001346 | TA357 .E36 2015 | Tez Koleksiyonu |
IYTE Library | Supplementary CD-ROM | ROM2444 | TA357 .E36 2015 EK.1 | Tez Koleksiyonu |