Computer analysis of transient effect on pipe system - using method of characteristics

Transient or unsteady phenomenon in a flow system may occur as a result of closing or opening of valves, stoppage of pumps, etc. This phenomenon has to be taken into consideration during design stage. At present, the use of digital computer is so widely used for two basic reasons, achieving more acc...

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Main Author: Abdul Aziz, Azmahani
Format: Thesis
Language:English
Published: 1993
Subjects:
Online Access:http://eprints.utm.my/7/1/AzmahaniAbdulAzizMFKA1993.pdf
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author Abdul Aziz, Azmahani
author_facet Abdul Aziz, Azmahani
author_sort Abdul Aziz, Azmahani
collection ePrints
description Transient or unsteady phenomenon in a flow system may occur as a result of closing or opening of valves, stoppage of pumps, etc. This phenomenon has to be taken into consideration during design stage. At present, the use of digital computer is so widely used for two basic reasons, achieving more accuracy and saving time. In this dissertation, the transient effects are analysed using the Method of Characteristics. Besides being able to visualise the actual physical conditions of the flow, the method also caters for all boundary conditions existing in the system. A computer program that is capable of predicting any transient phenomenon in the piping system is produced. A few case studies are identified for analysis, ie, single pipe, series pipe and simple pipe network. The scope of the investigation is limited to transients as a result of valve closure at the downstream end. Two flow parameters, ie, discharge, Q and piezometric head, H are considered. In addition, two types of closure are investigated, namely, rapid and slow closure. In general, results indicate that the transient phenomenon has performed effect around the source (valve). As the distance of propagation increases upstream, this effect slowly deminishes and is finally dissipated. Rapid closure achieves peak pressure time at or before 2L/a, whereas for slow closure, some resonance pressure arises that result in a damping at the end of the time interval.
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spelling utm.eprints-72020-02-04T07:16:10Z http://eprints.utm.my/7/ Computer analysis of transient effect on pipe system - using method of characteristics Abdul Aziz, Azmahani TA Engineering (General). Civil engineering (General) Transient or unsteady phenomenon in a flow system may occur as a result of closing or opening of valves, stoppage of pumps, etc. This phenomenon has to be taken into consideration during design stage. At present, the use of digital computer is so widely used for two basic reasons, achieving more accuracy and saving time. In this dissertation, the transient effects are analysed using the Method of Characteristics. Besides being able to visualise the actual physical conditions of the flow, the method also caters for all boundary conditions existing in the system. A computer program that is capable of predicting any transient phenomenon in the piping system is produced. A few case studies are identified for analysis, ie, single pipe, series pipe and simple pipe network. The scope of the investigation is limited to transients as a result of valve closure at the downstream end. Two flow parameters, ie, discharge, Q and piezometric head, H are considered. In addition, two types of closure are investigated, namely, rapid and slow closure. In general, results indicate that the transient phenomenon has performed effect around the source (valve). As the distance of propagation increases upstream, this effect slowly deminishes and is finally dissipated. Rapid closure achieves peak pressure time at or before 2L/a, whereas for slow closure, some resonance pressure arises that result in a damping at the end of the time interval. 1993-05 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/7/1/AzmahaniAbdulAzizMFKA1993.pdf Abdul Aziz, Azmahani (1993) Computer analysis of transient effect on pipe system - using method of characteristics. Masters thesis, Universiti Teknologi Malaysia, Faculty of Civil Engineering.
spellingShingle TA Engineering (General). Civil engineering (General)
Abdul Aziz, Azmahani
Computer analysis of transient effect on pipe system - using method of characteristics
title Computer analysis of transient effect on pipe system - using method of characteristics
title_full Computer analysis of transient effect on pipe system - using method of characteristics
title_fullStr Computer analysis of transient effect on pipe system - using method of characteristics
title_full_unstemmed Computer analysis of transient effect on pipe system - using method of characteristics
title_short Computer analysis of transient effect on pipe system - using method of characteristics
title_sort computer analysis of transient effect on pipe system using method of characteristics
topic TA Engineering (General). Civil engineering (General)
url http://eprints.utm.my/7/1/AzmahaniAbdulAzizMFKA1993.pdf
work_keys_str_mv AT abdulazizazmahani computeranalysisoftransienteffectonpipesystemusingmethodofcharacteristics