Results 31 to 40 of about 211 (136)
Numerical Modeling of Local Scour at the Junction of Open Channels in Flow3D Numerical Model [PDF]
Civil Engineering Journal, 2016 At the junction of channels, the two corresponding flows of the main and submain channels are diverted from their main alignment and the form and the flow properties change at the junction. Changes in water level profile and depth of flow, velocity distribution, stagnation zone, constriction of public channel, energy loss and also formation of ...
Behnam Shamohamadi, Ali Mehboudi
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An Experimental and Numerical Comparison of Flow Hydraulic Parameters in Circular Crested Weir Using Flow3D [PDF]
Civil Engineering Journal, 2016 Circular crested weirs consist of a circular crested of upstream and downstream walls. These weirs are widely used in hydraulic engineering as water discharge structures and can be used to control water level in channels and tanks. In the present study, using Flow3D software, hydraulic properties were investigated to find weir geometry optimization ...
Farhad Ghazizadeh, M. Azhdary Moghaddam
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مطالعه عددی تأثیر تبدیل تدریجی سهموی در بالادست دریچه سالونی بیضوی بر شرایط هیدرولیکی جریان [PDF]
علوم و مهندسی آبیاریسرریزها و دریچه ها از جمله سازه های موثر در شبکه های آبرسانی روباز می باشند. دریچه های سالونی بیضوی نوع خاصی از دریچه ها میباشند که اخیرا مورد توجه محققین قرار گرفت.
محمود شفاعی بجستان +2 more
doaj +1 more source
Analyzing Parameters Influencing Scour Bed in Confluence Channels Using Flow3D Numerical Model [PDF]
Civil Engineering Journal, 2016 Channels junction is a phenomenon which is used in most of irrigating and drainage networks and in hydraulic engineering in general. In two channels junction, main and secondary channels encounter with each other and move to the channel downstream. Scour holes and sedimentation zones are created in channels bed.
Behnam Shamohamadi, Ali Mehboudi
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Numerical Investigation of Energy Dissipation in Baffled Piano Key Weirs [PDF]
رویکردهای نوین در مهندسی آب و محیط زیستThis test was done in the hydraulic laboratory of Khuzestan Water and Electricity Organization. The flume used had a rectangular cross-section with a length of 7 meters and a width of 0.6 meters. The walls of the flume were 10 mm thick and made of glass.
Ali Iranpour +2 more
doaj +1 more source
Effect Of Pooled and Flat Stepped Spillway on Energy Dissipation Using Computational Fluid Dynamics
Tikrit Journal of Engineering Sciences, 2022 The goal of this research was to determine the impact of a pooled and flat stepped spillway on energy losses. FLOW3D, which is a computational fluid dynamics (CFD) program, with mesh size of 0.015 mm was used for this purpose. First, the code was tested
Shawnm Mudhafar Saleh +2 more
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ارزیابی عملکرد صفحات مستغرق با استفاده از مدل عددی Flow-3D [PDF]
هیدرولیک, 2020 هر صفحهی مستغرق، یک مولد جریان چرخشی ثانوی است که در نتیجهی وجود گرادیان قائم فشار در طرفین صفحه حاصل میگردد. عملکرد یک صفحهی مستغرق به الگوی جریان ثانوی ناشی از آن بستگی دارد.
رضا عزیزی +1 more
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Study on Calculation Models of Earth‐Air Heat Exchanger Systems
Journal of Energy, Volume 2014, Issue 1, 2014., 2014 Modeling is very useful tool in order to predict the effect of the operating parameters like pipe length, radius, depth of burial and air flow rate on the thermal performance and heating/cooling capacity of earth‐air heat exchanger (EAHE) systems. Till date many researchers have carried out a number of studies on calculation models for earth‐air heat ...
Trilok Singh Bisoniya +3 more
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3D CFD Simulations of MOCVD Synthesis System of Titanium Dioxide Nanoparticles
Journal of Nanomaterials, Volume 2013, Issue 1, 2013., 2013 This paper presents the 3‐dimensional (3D) computational fluid dynamics (CFD) simulation study of metal organic chemical vapor deposition (MOCVD) producing photocatalytic titanium dioxide (TiO2) nanoparticles. It aims to provide better understanding of the MOCVD synthesis system especially of deposition process of TiO2 nanoparticles as well as fluid ...
Siti Hajar Othman +4 more
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Parallel RFSAI‐BFGS Preconditioners for Large Symmetric Eigenproblems
Journal of Applied Mathematics, Volume 2013, Issue 1, 2013., 2013 We propose a parallel preconditioner for the Newton method in the computation of the leftmost eigenpairs of large and sparse symmetric positive definite matrices. A sequence of preconditioners starting from an enhanced approximate inverse RFSAI (Bergamaschi and Martínez, 2012) and enriched by a BFGS‐like update formula is proposed to accelerate the ...
L. Bergamaschi, A. Martínez, D. R. Sahu
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