LOGIN TO YOUR ACCOUNT

Username
Password
Remember Me
Or use your Academic/Social account:

CREATE AN ACCOUNT

Or use your Academic/Social account:

Congratulations!

You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.

Important!

Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message

CREATE AN ACCOUNT

Name:
Username:
Password:
Verify Password:
E-mail:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:
fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Ghani, Usman; Marriott, Martin; Wormleaton, Peter (2013)
Languages: English
Types: Article
Subjects:
This research work presents the prediction capability of Reynolds Averaged Navior-Stoke,s equations\ud based k- & k- turbulence models. Two solvers (SSIIM and FLUENT) were used in this research work. The\ud performance of the two turbulence models was gauged for one flow case. Mesh dependency check was also done.\ud Once it was proved that both the models produce approximately same results, the k- model was then tested for its\ud suitability for studying various flow aspects of meandering channels. Two different meandering channel geometries\ud with the same sinuosity (centre line planform geometry), main channel meander width/floodplain width ratio and\ud same main channel aspect ratio were used. However main channel width varied in two cases. Both bankfull and\ud overbank flows were considered. The bend radius to main channel width ratio (r/bc) of the wider main channel was\ud 1.0 whereas it was 1.8 for narrow channel. The model predicted the depth averaged velocities (DAV), water surface\ud profiles, velocity vectors in planforms at different levels with good accuracy. It captured all the salient features of\ud the flow for inbank, low overbank and high overbank flows. From this study it can be concluded that k- model\ud can be used with confidence in these types of meandering channels.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • 1 Ervine DA, Willetts BB, Sellin RHJ, Lorena M. Factors affecting conveyance in meandering compound flows. Journal of Hydraulic Engineering 1993; 119(12): 1383-99.
    • 2 Wormleaton PR, Sellin RHJ, Loveless JH, Bryant T, Hey RD, Catmur SE. (2004). Flow structures in a two-stage meandering channel with a mobile bed. Journal of Hydraulic Research 2004; 42(2): 145-62.
    • 3 Myers WRC, Lyness JE, Cassells JB, O'Sullivan JJ. Geometrical and roughness effects on compound channel resistance. Proc. I.C.E. Water Maritime & Energy London, 2000; 142(3): 157-66.
    • 4 Wormleaton PR, Marriott MJ. An experimental and numerical study of the effects of width of meandering main channel on overbank flows. IAHR Congress Venice Italy 2007; 32: 575-82.
    • 5 Wormleaton PR, Ewunetu M. Three dimensional k-ε numerical modelling of overbank flow in a mobile bed meandering channel with floodplains of different depth, roughness and planform. Journal of Hydraulic Research 2006; 44(1): 18-32.
    • 6 Olsen NRB. SSIIM Users' Manual, The Norwegian University of Science and Technology, 2011.
    • 7 Marriott MJ. The effect of overbank flow on the conveyance of the inbank zone in meandering compound channels. IAHR Congress Graz Austria 1999; 28: 612-18.
    • 8 Marriott, MJ. Hydrodynamics of flow around bends in meandering and compound channels. Ph.D thesis, University of Hertfordshire, UK, 1998.
    • 9 Patankar SV. Numerical heat transfer and fluid flow. McGraw-Hill, New York, 1980.
    • 10 Bagnold RA. Some aspects of the shape of river meanders. US Geological Survey, Professional Paper 1960; 282E: 135-44.
  • No related research data.
  • No similar publications.

Share - Bookmark

Cite this article