scholarly journals Prediction of Backwater Profiles due to Bridges in a Compound Channel Using CFD

2014 ◽  
Vol 6 ◽  
pp. 905217 ◽  
Author(s):  
Selahattin Kocaman
Keyword(s):  
Good Description ◽  
Design Tool ◽  
Cfd Analysis ◽  
Compound Channel ◽  
Turbulent Eddy ◽  
Computing Power ◽  
Eddy Motion ◽  
Different Types ◽  
Computational Fluid Dynamics Cfd ◽  
Surface Profiles

With the advancements in computing power, computational fluid dynamics (CFD) analysis has emerged as a powerful hydraulics design tool. This study aims to assess the performance of CFD via commercially available software (FLOW-3D) in the prediction of backwater surface profiles for three different types of bridges with or without piers in a compound channel. A standard two-equation turbulence model ( k- ε) was used to capture turbulent eddy motion. The numerical model results were compared with the available experimental data and the comparisons indicate that the CFD model provides reasonably good description of backwater surface profiles upstream of the bridges. Notably, the computed and measured afflux values are found to be almost identical.

scholarly journals Aerodynamic performance of X-plane with two different types of inboard stores

2018 ◽  
Vol 7 (4.13) ◽  
pp. 202-204
Author(s):  
Mahadhir A Rahman ◽  
Mohammad Yazdi Harmin ◽  
Mohd Fuad Koslan ◽  
Mohd Rashdan Saad ◽  
Mohd Faisal Abdul Hamid
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Aerodynamic Performance ◽  
Cfd Analysis ◽  
Aircraft Model ◽  
Different Types ◽  
Computational Fluid Dynamics Cfd

This paper presents the investigation of aerodynamic performance of inboard Store-X and Store-Y configurations on the X-plane aircraft model through computational fluid dynamics (CFD) analysis. The X-plane and Store-Y represent the default store and pylon integration while Store-X provides a possibility for other types of store to be integrated. These stores are loosely based upon the two most commonly used by the western and eastern blocks. The resultant lift, drag and moment forces are of interest in order to observe their impact with respect to the two different stores configurations. The finding shows that the aerodynamic impact with respect to Store-X installation on the inboard pylon station is insignificant when compared to default system, hence offers the safety of delivering the Store-X from the X-plane aircraft.

scholarly journals CFD Analysis on Pumps Working as Turbines

1970 ◽  
Vol 6 ◽  
pp. 35-37 ◽  
Author(s):  
Himanshu Nautiyal ◽  
Varun Kumar ◽  
Anoop Thakur
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Design Tool ◽  
Recent Attempt ◽  
Cfd Analysis ◽  
Centrifugal Pumps ◽  
Small Hydropower ◽  
Hydropower Plants ◽  
Computational Fluid Dynamics Cfd ◽  
Turbine Mode

 Reverse running centrifugal pumps are  an effective source of reducing the equipment cost in small hydropower plants. The manufacturers do not provide any information on the performance and fow characteristics when pumps are operated in turbine mode. Lack of Pump as Turbine (PAT) performance data is a signifcant barrier to the wider use of PAT. Application of Computational Fluid Dynamics (CFD) is a recent attempt for predicting the performance of PAT. CFD analysis is an effective design tool for predicting the performance of reverse running operation of centrifugal pumps. But some deviationsstill exist in experimental and CFD results of reverse operation of pumps. Future works in the feld of computational analysis can further improve the prediction of pumps in reverse operation. Key words:  Pump as Turbine (PAT); Computational Fluid Dynamics (CFD); PumpDOI: 10.3126/hn.v6i0.4191   Hydro Nepal Vol 6, January 2010 Page : 35-37 Uploaded Date:24 January, 2011

Experimental and Numerical Analysis of Lift and Drag Force of Sedan Car Spoiler

2012 ◽  
Vol 165 ◽  
pp. 43-47 ◽  
Author(s):  
A.R. Norwazan ◽  
A.J. Khalid ◽  
A.K. Zulkiffli ◽  
O. Nadia ◽  
M.N. Fuad
Keyword(s):  
Fluid Dynamics ◽  
Wind Tunnel Test ◽  
Point Of View ◽  
Cfd Analysis ◽  
Baseline Model ◽  
Different Types ◽  
Rear Spoiler ◽  
Computational Fluid Dynamics Cfd ◽  
Drag And Lift ◽  
Lift And Drag

Nowadays, the spoiler is fitted at the rear car to make the car looks sporty without taking any consideration to its shape and aerodynamic. This paper carried out other benefits of the rear spoiler respective to the engineering point of view. These study concerns about drag and lift forces were produced by spoiler using wind tunnel test and simulation computational fluid dynamics (CFD) analysis. The main objective of this project is to compare the performances between the two methods in order to determine the aerodynamics performance of three different types of spoiler. The results of CLand CDhave been determined and compared for all the three spoilers including the baseline model as a reference. The result shows that the comparisons of all models have different value of CLand CDbut the model of spoiler 3 is more than 5%.

scholarly journals Special Issue on “CFD Based Researches and Applications for Fluid Machinery and Fluid Device”

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1137
Author(s):  
Jin-Hyuk Kim ◽  
Sung-Min Kim ◽  
Minsuk Choi ◽  
Lei Tan ◽  
Bin Huang ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Power System ◽  
Special Issue ◽  
Numerical Techniques ◽  
Fluid Machinery ◽  
Computing Power ◽  
Computational Fluid Dynamics Cfd

The demand for computational fluid dynamics (CFD)-based numerical techniques is increasing rapidly with the development of the computing power system [...]

Analysis of an Airfoil Using a Transition and Turbulence Model

2016 ◽  
Vol 819 ◽  
pp. 356-360
Author(s):  
Mazharul Islam ◽  
Jiří Fürst ◽  
David Wood ◽  
Farid Nasir Ani
Keyword(s):  
Fluid Dynamics ◽  
Boundary Layer ◽  
Computational Fluid Dynamics ◽  
Kinetic Energy ◽  
Turbulence Model ◽  
Original Version ◽  
Transitional Region ◽  
Cfd Analysis ◽  
Computational Fluid Dynamics Cfd

In order to evaluate the performance of airfoils with computational fluid dynamics (CFD) tools, modelling of transitional region in the boundary layer is very critical. Currently, there are several classes of transition-based turbulence model which are based on different methods. Among these, the k-kL- ω, which is a three equation turbulence model, is one of the prominent ones which is based on the concept of laminar kinetic energy. This model is phenomenological and has several advantageous features. Over the years, different researchers have attempted to modify the original version which was proposed by Walter and Cokljat in 2008 to enrich the modelling capability. In this article, a modified form of k-kL-ω transitional turbulence model has been used with the help of OpenFOAM for an investigative CFD analysis of a NACA 4-digit airfoil at range of angles of attack.

Turbulent eddy motion and frozen-in field

1964 ◽  
Vol 13 (4) ◽  
pp. 297-298 ◽  
Author(s):  
R.S. Iyengar
Keyword(s):  
Turbulent Eddy ◽  
Eddy Motion

scholarly journals Computational Fluid Dynamics (CFD) as a tool for the analysis of ventilation and indoor microclimate in agricultural buildings

1997 ◽  
Vol 45 (1) ◽  
pp. 81-96 ◽  
Author(s):  
A. Mistriotis ◽  
T. De Jong ◽  
M.J.M. Wagemans ◽  
G.P.A. Bot
Keyword(s):  
Fluid Dynamics ◽  
Laboratory Experiments ◽  
Numerical Technique ◽  
Design Tool ◽  
Indoor Climate ◽  
Pressure Coefficients ◽  
Computational Fluid Dynamics Cfd ◽  
Basic Concepts ◽  
Experimental Values ◽  
Broiler House

The basic concepts of CFD are presented in relation to applications in modelling the ventilation process and the resulting indoor climate of agricultural buildings. The validity and the advantages of this numerical technique are presented using 3 examples. Firstly the pressure coefficients along the roof of a 7-span Venlo-type greenhouse were calculated and compared with the corresponding experimental values. Next, the ventilation process in a single-span greenhouse was investigated and the results were compared to laboratory experiments. Finally, the use of CFD as a design tool for more efficient ventilation systems was demonstrated for the case of a broiler house.

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