Application of Multi-Block method for simulating shallow free surface flows in complex geometries

In the present study a numerical method is developed for simulating shallow free surface flows in complex geometries. A Multi-Block (MB) method is employed in conjunction with non-orthogonal curvilinear coordinate system. This technique gives the numerical method a high flexibility to tackle flow do...

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Bibliographic Details
Published in:Journal of hydraulic research 2008-01, Vol.46 (5), p.668-678
Main Authors: Hadian, M.R., Zarrati, A.R.
Format: Article
Language:English
Subjects:
Complex geometry
depth correction
Earth sciences
Earth, ocean, space
Exact sciences and technology
free surface
Hydrology. Hydrogeology
implicit
multi block
numerical model
shallow-flow
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Summary:In the present study a numerical method is developed for simulating shallow free surface flows in complex geometries. A Multi-Block (MB) method is employed in conjunction with non-orthogonal curvilinear coordinate system. This technique gives the numerical method a high flexibility to tackle flow domains with any complex boundary which may be encountered in nature. The MB method utilizes patched grid with continuous grid lines across block boundaries. In this paper the MB methods is applied to 2-D shallow flows. However, this technique is extendable to 3-D models too. The model is based on collocated grid arrangement and the control volume method is used for solution of equations. The method is implicit and uses a SIMPLEC-like algorithm to find the water surface elevation. The flexibility and accuracy of the model is presented in few test cases with complex block arrangement and circulating flows.
ISSN:0022-1686
1814-2079
DOI:10.3826/jhr.2008.2898