scholarly journals 3D Flow Modeling of the First Trifurcation Made in Nepal

1970 ◽  
Vol 5 ◽  
pp. 56-61 ◽  
Author(s):  
R K Malik ◽  
Paras Paudel
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Vortex Formation ◽  
Maximum Flow ◽  
Flow Modeling ◽  
Zone Formation ◽  
Physical Constraints ◽  
3 Dimensional ◽  
Dimensional Flow ◽  
Computational Fluid Dynamics Cfd

The foremost objective of the study was to find out the most efficient profile of trifurcation in given constraints of pressure, velocity and layout of the overall geometry. The study was done for the 3.2 MW Madi Khola Hydropower Project of Gandaki Hydropower Development Co. Pvt. Ltd. The 3 Dimensional Flow modeling of the trifurcation was based on the application of Computational Fluid Dynamics (CFD).The loss in the Trifurcation greatly depends upon its geometrical configuration. The research started with a general profi le and the flow pattern generated inside it was studied with the help of 3 Dimensional Flow modeling. The extent of vortex zone formation inside the trifurcation indicates the loss inside trifurcation. The profile of the trifurcation was hence changed to reduce the vortex formation as far as possible, till we get minimum possible loss. The profile under study should meet maximum flow efficiency under the physical constraints of fabrication. The flow efficient profile was then analyzed to capture the stress amplifi cation near junction. The reinforcing element in the form of steel T-section was added of different sectional values till the stress was within allowable limits under severe conditions.Key words: Symmetrical Trifuraction; Trifurcation; Computational fluid dynamics; Hydropower; NepalDOI: 10.3126/hn.v5i0.2493Hydro Nepal Vol. 5, July 2009 Page:56-61

3D Flow Modeling of the First Trifurcation Made in Nepal

2016 ◽  
Vol 1 ◽  
pp. 85
Author(s):  
Radha Krishan Mallik ◽  
Paras Paudel
Keyword(s):  
Vortex Formation ◽  
Maximum Flow ◽  
Flow Modeling ◽  
Zone Formation ◽  
Physical Constraints ◽  
3 Dimensional ◽  
Dimensional Flow ◽  
Stress Amplification ◽  
Computational Fluid Dynamics Cfd ◽  
College Of Engineering

<p>The foremost objective of the study was to find out the most efficient profile of trifurcation in given constraints of pressure, velocity and layout of the overall geometry. The study was done for the 3.2 MW Madi Khola Hydropower Project of Gandaki Hydropower Development Co. Pvt. Ltd.  The 3 Dimensional Flow modeling of the trifurcation was based on the application of Computational Fluid Dynamics (CFD).</p><p> The loss in the Trifurcation greatly depends upon its geometrical configuration. The research started with a general profile and the flow pattern generated inside it was studied with the help of 3 Dimensional Flow modeling .The extent of vortex zone formation inside the trifurcation indicates the loss inside trifurcation. The profile of the trifurcation was hence changed to reduce the vortex formation as far as possible, till we get minimum possible loss. The profile under study should meet maximum flow efficiency under the physical constraints of fabrication. The flow efficient profile was then analyzed to capture the stress amplification near junction. The reinforcing element in the form of steel T-section was added of different sectional values till the stress was within allowable limits under severe conditions.</p><p><em>Journal of Advanced College of Engineering and Management, Vol. 1, 2015</em>, pp. 85-96</p>

scholarly journals Evaluation of Seabed Stability and Scour Control Around Subsea Gravity Protection Structures

2010 ◽  
Author(s):  
Richard J. S. Whitehouse ◽  
Carlos Lam ◽  
Stephen Richardson ◽  
Peter Keel
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
North Sea ◽  
Cfd Analysis ◽  
Cfd Model ◽  
3 Dimensional ◽  
Computational Fluid Dynamics Cfd ◽  
The Uk ◽  
Study Application

Results from an advanced 3-dimensional Computational Fluid Dynamics (CFD) model have proven to form an effective basis on which to design stable and scour resistant subsea structures in areas of seabed which are prone to scouring. A case study application from the UK sector of the southern North Sea is presented to demonstrate the benefits of the CFD analysis.

Computational Study of Single-Sided Ventilation Through a 3-Dimensional Room With Rounded Edges

2013 ◽  
Author(s):  
A. Idris ◽  
B. P. Huynh
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Wind Speed ◽  
Flow Pattern ◽  
Flow Rate ◽  
Software Package ◽  
Computational Study ◽  
Ventilation Rate ◽  
3 Dimensional ◽  
Computational Fluid Dynamics Cfd

A commercial Computational Fluid Dynamics (CFD) software package is used to investigate numerically a 3-dimensional rectangular-box room with rounded edges. The room has all its window openings located on one wall only. The standard K-ε turbulence model is used. Air’s flow rate and flow pattern are considered in terms of wind speed and the openings’ characteristics, such as their number, location, size and shape. Especially, comparison with ventilation rate corresponding to when the room edges are sharp is made; and thereby the effects of the edges being rounded are examined.

Computational Study of Single-Sided Ventilation Through a 3-Dimensional Room

2012 ◽  
Author(s):  
A. Idris ◽  
B. P. Huynh
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Wind Speed ◽  
Flow Rate ◽  
Software Package ◽  
Computational Study ◽  
Ventilation Rate ◽  
3 Dimensional ◽  
Computational Fluid Dynamics Cfd ◽  
Flow Through

Ventilation flow through a 3-dimensional rectangular-box room is investigated numerically, by using a commercial Computational Fluid Dynamics (CFD) software package. The room has all its window openings located on one wall, and the wind is assumed to blow parallel to this wall. The standard K-epsilon turbulence model is used. Air’s flow rate and flow pattern are considered in terms of wind speed and the openings’ characteristics, such as their number, location, size and shape. For a constant total area of the openings, it is found that ventilation rate increases with more openings, especially when they are widely separated or positioned at different heights.

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