Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Software development for analyzing fluid transients in pipelines
Download
index.pdf
Date
2020
Author
Habibi Topraghghaleh, Saber
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
269
views
145
downloads
Cite This
A computer program is developed to analyze and simulate fluid transients in hydraulic systems contributing to finding practical solutions for unsteady flow conditions in pipelines. This program is built up using C sharp programming language in the visual studio platform. In the software, the method of characteristics is used for solving the non-linear partial differential equations of the transient flow. This software’s primary purpose is to find quick solutions for a phenomenon called water hammer, which has been a severe problem for hydraulics engineers. The term water hammer in pipes is used for the condition in which pressure waves are created when the boundary conditions caused a moving fluid to experience a sudden change in its flow rate. This problem could be very damaging, and sometimes it leads to deadly consequences, and at the designing stage to provide safety, this phenomenon must be taken into account for pipelines. A number of boundary conditions can cause these sudden changes in the flow rate. Some of these conditions are opening or closing valves, pump trip, turbine load rejection or acceptance, etc. Solving and finding solutions manually for this phenomenon is very tedious and time-consuming work. As a result, a number of softwares have been developed in the world to tackle this important issue. The present study is one of them to address the problem efficiently and accurately. For the time being, a new software has been developed in this study with some limited but important boundary conditions. The results of the number of problems tested indicate its correctness. It is hoped that it would be enriched in future studies with additional boundary conditions.
Subject Keywords
Pipelines.
,
Pipelines
,
Water hammer
,
Fluid transients
,
Software development
,
Boundary Conditions.
URI
http://etd.lib.metu.edu.tr/upload/12625558/index.pdf
https://hdl.handle.net/11511/45797
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
The method of lines solution of the discrete ordinates method for radiative heat transfer in enclosures
Selçuk, Nevin; Külah, Görkem (2000-04-01)
A radiation code based on the method of fines (MOL) solution of the discrete ordinates method (DOM) for transient three-dimensional radiative heat transfer in rectangular enclosures for use in conjunction with a computational fluid dynamics (CFD) code based on the same approach,vas developed. Assessment of the predictive accuracy of the code by benchmarking its steady-state solutions against exact solutions on one- and three-dimensional test problems shows that the MOL solution of the DOM provides accurate ...
Design and analysis of a vertical axis water turbine for river applications using computational fluid dynamics
Demircan, Eren; Aksel, Mehmet Haluk; Pınarcıoğlu, Mehmet Melih; Department of Mechanical Engineering (2014)
The main purpose of this study is to design a Darrieus rotor type vertical axis water turbine using Computational Fluid Dynamics (CFD) in order to be used in river currents. The CFD modeling is based on two dimensional numerical solution of the rotor motion using commercial Unsteady Reynolds Averaged Navier-Stokes solvers, Ansys Fluent and CFX. To validate the two dimensional numerical solution, an experimental Darrieus rotor type water turbine from literature is studied and performance of several turbulenc...
Numerical simulation of wave-induced scour and backfilling processes beneath submarine pipelines
Fuhrman, David R; Baykal, Cüneyt; Sumer, B Mutlu; Jacobsen, Niels G; Fredsoe, Jorgen (2014-12-01)
A fully-coupled hydrodynamic/morphodynamic numerical model is presented and utilized for the simulation of wave-induced scour and backfilling processes beneath submarine pipelines. The model is based on solutions to Reynolds-averaged Navier-Stokes equations, coupled with k - omega turbulence closure, with additional bed and suspended load descriptions forming the basis for sea bed morphology. The morphological evolution is updated continuously, rather than being based e.g. on period- or other time-averaging...
Optimal control of gas pipelines via infinite-dimensional analysis
Durgut, I; Leblebicioğlu, Mehmet Kemal (1996-05-15)
A general optimal control approach employing the principles of calculus of variations has been developed to determine the best operating strategies for keeping the outlet pressure of gas transmission pipelines around a predetermined value while achieving reasonable energy consumption. The method exploits analytical tools of optimal control theory. A set of partial differential equations characterizing the dynamics of gas flow through a pipeline is directly used The necessary conditions to minimize the speci...
Numerical investigation of the effect of the Rushton type turbine design factors on agitated tank flow characteristics
Yapici, Kerim; Karasözen, Bülent; Schaefer, Michael; Uludağ, Yusuf (2008-08-01)
The turbulent flow field in a mixing tank generated by the six-blade Rushton turbine impeller is predicted by using computational fluid dynamics. The governing differential equations of the fluid flow are approximated by an algebraic set of equations through a finite volume method, while large eddy simulation is employed to handle the effects originating from the turbulence. The relative motion between the rotating impeller and the stationary baffle is considered by clicking mesh method. The effects of impe...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
S. Habibi Topraghghaleh, “Software development for analyzing fluid transients in pipelines,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Civil Engineering., Middle East Technical University, 2020.