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Search Results (2)

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Authors = M. Cihan Aydin

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12 pages, 736 KiB  
Article
Numerical Modeling of Venturi Flows for Determining Air Injection Rates Using Fluent V6.2
by Ahmet Baylar, M. Cihan Aydin, Mehmet Unsal and Fahri Ozkan
Math. Comput. Appl. 2009, 14(2), 97-108; https://doi.org/10.3390/mca14020097 - 1 Aug 2009
Cited by 37 | Viewed by 3988
Abstract
As the water passes through a restriction in a pipe, it forms a vacuum at the end of the restriction. A hole bored into the pipe at a point where this vacuum occurs will cause air to be drawn into the main flow. [...] Read more.
As the water passes through a restriction in a pipe, it forms a vacuum at the end of the restriction. A hole bored into the pipe at a point where this vacuum occurs will cause air to be drawn into the main flow. One example of this mechanism is seen in the venturi tube. When a minimal amount of differential pressure exists between the inlet and outlet sides of the venturi tube, a vacuum occurs at suction holes of the venturi tube. Venturi aeration is a method of aeration that has become popular in recent years. In present paper, air injection rates of venturi tubes are analyzed using Computational Fluid Dynamics modeling. These analyses are carried out by means of the program FLUENT V6.2 that uses finite volume theory. There is a good agreement between the measured air injection rates and the values computed from FLUENT CFD program. Full article
10 pages, 333 KiB  
Article
Verification of a 3-D Numerical Model for Spillway Aerator
by Mualla Ozturk and M. Cihan Aydin
Math. Comput. Appl. 2009, 14(1), 21-30; https://doi.org/10.3390/mca14010021 - 1 Apr 2009
Cited by 10 | Viewed by 1707
Abstract
In this study, the results of CFD obtained by using Fluent with respect to the air entrainment at spillway aerators are compared to the data of the physical model study and the results of some empirical equations presented by other investigators. The air [...] Read more.
In this study, the results of CFD obtained by using Fluent with respect to the air entrainment at spillway aerators are compared to the data of the physical model study and the results of some empirical equations presented by other investigators. The air entrainment rates obtained from the CFD analyses are in reasonable good agreement with the values calculated by the empirical equations. However, the CFD results are better than the physical model data including considerable scale effects. The numerical verification procedure in this study is based on the ASME editorial policy statement, which provides a framework for computational fluid dynamics uncertainty analysis. So, the validation of the CFD model was discussed in this scope. Full article
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