Search results for: A. Oulhaj

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Oulhaj</title> <meta name="description" content="Search results for: A. Oulhaj"> <meta name="keywords" content="A. Oulhaj"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler ml-auto" type="button" data-toggle="collapse" data-target="#navbarMenu" aria-controls="navbarMenu" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="w-100"> <div class="d-none d-lg-flex flex-row-reverse"> <form method="get" action="https://waset.org/search" class="form-inline my-2 my-lg-0"> <input class="form-control mr-sm-2" type="search" placeholder="Search Conferences" value="A. 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Oulhaj"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 5</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: A. Oulhaj</h1> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5</span> Sizing the Protection Devices to Control Water Hammer Damage </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=I.%20Abuiziah">I. Abuiziah</a>, <a href="https://publications.waset.org/search?q=A.%20Oulhaj"> A. Oulhaj</a>, <a href="https://publications.waset.org/search?q=K.%20Sebari"> K. Sebari</a>, <a href="https://publications.waset.org/search?q=D.%20Ouazar"> D. Ouazar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>The primary objectives of transient analysis are to determine the values of transient pressures that can result from flow control operations and to establish the design criteria for system equipment and devices (such as control devices and pipe wall thickness) so as to provide an acceptable level of protection against system failure due to pipe collapse or bursting. Because of the complexity of the equations needed to describe transients, numerical computer models are used to analyze transient flow hydraulics. An effective numerical model allows the hydraulic engineer to analyze potential transient events and to identify and evaluate alternative solutions for controlling hydraulic transients, thereby protecting the integrity of the hydraulic system. This paper presents the influence of using the protection devices to control the adverse effects due to excessive and low pressure occurs in the transient.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Flow%20Transient" title="Flow Transient">Flow Transient</a>, <a href="https://publications.waset.org/search?q=Water%20hammer" title=" Water hammer"> Water hammer</a>, <a href="https://publications.waset.org/search?q=Pipeline%20System" title=" Pipeline System"> Pipeline System</a>, <a href="https://publications.waset.org/search?q=Surge%20Tank" title=" Surge Tank"> Surge Tank</a>, <a href="https://publications.waset.org/search?q=Simulation%20Model" title=" Simulation Model"> Simulation Model</a>, <a href="https://publications.waset.org/search?q=Protection%20Devices." title=" Protection Devices. "> Protection Devices. </a> </p> <a href="https://publications.waset.org/9997283/sizing-the-protection-devices-to-control-water-hammer-damage" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/9997283/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/9997283/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/9997283/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/9997283/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/9997283/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/9997283/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/9997283/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/9997283/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/9997283/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/9997283/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/9997283.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">9492</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> Controlling Transient Flow in Pipeline Systems by Desurging Tank with Automatic Air Control</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=I.%20Abuiziah">I. Abuiziah</a>, <a href="https://publications.waset.org/search?q=A.%20Oulhaj"> A. Oulhaj</a>, <a href="https://publications.waset.org/search?q=K.%20Sebari"> K. Sebari</a>, <a href="https://publications.waset.org/search?q=D.%20Ouazar"> D. Ouazar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>Desurging tank with automatic air control “DTAAC” is a water hammer protection device, operates either an open or closed surge tank according to the water level inside the surge tank, with the volume of air trapped in the filling phase, this protection device has the advantages of its easy maintenance, and does not need to run any external energy source (air compressor). A computer program has been developed based on the characteristic method to simulate flow transient phenomena in pressurized water pipeline systems, it provides the influence of using the protection devices to control the adverse effects due to excessive and low pressure occurring in this phenomena. The developed model applied to a simple main water pipeline system: pump combined with DTAAC connected to a reservoir.  The results obtained provide that the model is an efficient tool for water hammer analysis. Moreover; using the DTAAC reduces the unfavorable effects of the transients.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=DTAAC" title="DTAAC">DTAAC</a>, <a href="https://publications.waset.org/search?q=Flow%20transient" title=" Flow transient"> Flow transient</a>, <a href="https://publications.waset.org/search?q=Numerical%20model" title=" Numerical model"> Numerical model</a>, <a href="https://publications.waset.org/search?q=Pipeline%20system" title=" Pipeline system"> Pipeline system</a>, <a href="https://publications.waset.org/search?q=Protection%20devices." title=" Protection devices."> Protection devices.</a> </p> <a href="https://publications.waset.org/9997299/controlling-transient-flow-in-pipeline-systems-by-desurging-tank-with-automatic-air-control" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/9997299/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/9997299/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/9997299/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/9997299/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/9997299/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/9997299/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/9997299/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/9997299/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/9997299/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/9997299/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/9997299.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">2814</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> Study on Status and Development of Hydraulic System Protection: Pump Combined With Air Chamber</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=I.%20Abuiziah">I. Abuiziah</a>, <a href="https://publications.waset.org/search?q=A.%20Oulhaj"> A. Oulhaj</a>, <a href="https://publications.waset.org/search?q=K.%20Sebari"> K. Sebari</a>, <a href="https://publications.waset.org/search?q=D.%20Ouazar"> D. Ouazar</a>, <a href="https://publications.waset.org/search?q=A.%20A.%20Saber"> A. A. Saber</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>Fluid transient analysis is one of the more challenging and complicated flow problems in the design and the operation of water pipeline systems (wps). When transient conditions "water hammer" exists, the life expectancy of the wps can be adversely impacted, resulting in pump and valve failures and catastrophic pipe ruptures. Transient control has become an essential requirement for ensuring safe operation of wps. An accurate analysis and suitable protection devices should be used to protect wps. This paper presents the problem of modeling and simulation of transient phenomena in wps based on the characteristics method. Also, it provides the influence of using the protection devices to control the adverse effects due to excessive and low pressure occur in the transient. The developed model applied for main wps: pump combined with closed surge tank connected to a reservoir. The results obtained provide that the model is an efficient tool for water hammer analysis. Moreover; using the closed surge tank reduces the unfavorable effects of transients.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Flow%20Transient" title="Flow Transient">Flow Transient</a>, <a href="https://publications.waset.org/search?q=Water%20hammer" title=" Water hammer"> Water hammer</a>, <a href="https://publications.waset.org/search?q=Pipeline%20System" title=" Pipeline System"> Pipeline System</a>, <a href="https://publications.waset.org/search?q=Closed%20Surge%20Tank" title=" Closed Surge Tank"> Closed Surge Tank</a>, <a href="https://publications.waset.org/search?q=Simulation%20Model" title=" Simulation Model"> Simulation Model</a>, <a href="https://publications.waset.org/search?q=Protection%20Devices" title=" Protection Devices"> Protection Devices</a>, <a href="https://publications.waset.org/search?q=Characteristics%20Method." title=" Characteristics Method."> Characteristics Method.</a> </p> <a href="https://publications.waset.org/9997282/study-on-status-and-development-of-hydraulic-system-protection-pump-combined-with-air-chamber" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/9997282/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/9997282/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/9997282/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/9997282/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/9997282/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/9997282/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/9997282/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/9997282/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/9997282/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/9997282/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/9997282.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">2213</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> Comparative Study on Status and Development of Transient Flow Analysis Including Simple Surge Tank</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=I.%20Abuiziah">I. Abuiziah</a>, <a href="https://publications.waset.org/search?q=A.%20Oulhaj"> A. Oulhaj</a>, <a href="https://publications.waset.org/search?q=K.%20Sebari"> K. Sebari</a>, <a href="https://publications.waset.org/search?q=D.%20Ouazar"> D. Ouazar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>This paper presents the problem of modeling and simulating of transient phenomena in conveying pipeline systems based on the rigid column and full elastic methods. Transient analysis is important and one of the more challenging and complicated flow problem in the design and the operation of water pipeline systems. Transient can produce large pressure forces and rapid fluid acceleration into a water pipeline system, these disturbances may result in device failures, system fatigue or pipe ruptures, and even the dirty water intrusion. Several methods have been introduced and used to analyze transient flow, an accurate analysis and suitable protection devices should be used to protect water pipeline systems. The fourth-order Runge-Kutta method has been used to solve the dynamic and continuity equations in the rigid column method, while the characteristics method used to solve these equations in the full elastic method. The results obtained provide that the model is an efficient tool for flow transient analysis and provide approximately identical results by using these two methods. Moreover; using the simple surge tank ”open surge tank” reduces the unfavorable effects of transients.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Elastic%20method" title="Elastic method">Elastic method</a>, <a href="https://publications.waset.org/search?q=Flow%20transient" title=" Flow transient"> Flow transient</a>, <a href="https://publications.waset.org/search?q=Open%20surge%20tank" title=" Open surge tank"> Open surge tank</a>, <a href="https://publications.waset.org/search?q=Pipeline" title=" Pipeline"> Pipeline</a>, <a href="https://publications.waset.org/search?q=Protection%20devices" title=" Protection devices"> Protection devices</a>, <a href="https://publications.waset.org/search?q=Numerical%20model" title=" Numerical model"> Numerical model</a>, <a href="https://publications.waset.org/search?q=Rigid%20column%20method." title=" Rigid column method."> Rigid column method.</a> </p> <a href="https://publications.waset.org/9997729/comparative-study-on-status-and-development-of-transient-flow-analysis-including-simple-surge-tank" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/9997729/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/9997729/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/9997729/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/9997729/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/9997729/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/9997729/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/9997729/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/9997729/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/9997729/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/9997729/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/9997729.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">2992</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> Simulating Flow Transients in Conveying Pipeline Systems by Rigid Column and Full Elastic Methods: Pump Combined with Air Chamber</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=I.%20Abuiziah">I. Abuiziah</a>, <a href="https://publications.waset.org/search?q=A.%20Oulhaj"> A. Oulhaj</a>, <a href="https://publications.waset.org/search?q=K.%20Sebari"> K. Sebari</a>, <a href="https://publications.waset.org/search?q=D.%20Ouazar"> D. Ouazar</a>, <a href="https://publications.waset.org/search?q=A.%20A.%20Saber"> A. A. Saber</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>In water pipeline systems, the flow control is an integrated part of the operation, for instance, opening and closing the valves, starting and stopping the pumps, when these operations very quickly performed, they shall cause the hydraulic transient phenomena, which may cause pump and, valve failures and catastrophic pipe ruptures. Fluid transient analysis is one of the more challenging and complicated flow problems in the design and the operation of water pipeline systems. Transient control has become an essential requirement for ensuring safe operation of water pipeline systems. An accurate analysis and suitable protection devices should be used to protect water pipeline systems. The fourth-order Runge-Kutta method has been used to solve the dynamic and continuity equations in the rigid column method, while the characteristics method used to solve these equations in the full elastic methods. This paper presents the problem of modeling and simulating of transient phenomena in conveying pipeline systems based on the rigid column and full elastic methods. Also, it provides the influence of using the protection devices to protect the pipeline systems from damaging due to the gain pressure which occur in the transient state. The results obtained provide that the model is an efficient tool for flow transient analysis and provide approximately identical results by using these two methods. Moreover; using the closed surge tank reduces the unfavorable effects of transients.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Flow%20transient" title="Flow transient">Flow transient</a>, <a href="https://publications.waset.org/search?q=Pipeline" title=" Pipeline"> Pipeline</a>, <a href="https://publications.waset.org/search?q=Air%20chamber" title=" Air chamber"> Air chamber</a>, <a href="https://publications.waset.org/search?q=Numerical%20model" title=" Numerical model"> Numerical model</a>, <a href="https://publications.waset.org/search?q=Protection%20devices" title=" Protection devices"> Protection devices</a>, <a href="https://publications.waset.org/search?q=Elastic%20method" title=" Elastic method"> Elastic method</a>, <a href="https://publications.waset.org/search?q=Rigid%20column%20method." title=" Rigid column method. "> Rigid column method. </a> </p> <a href="https://publications.waset.org/9996593/simulating-flow-transients-in-conveying-pipeline-systems-by-rigid-column-and-full-elastic-methods-pump-combined-with-air-chamber" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/9996593/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/9996593/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/9996593/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/9996593/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/9996593/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/9996593/json" target="_blank" rel="nofollow" class="btn 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