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dc.contributor.authorRathnayake, U. S-
dc.contributor.authorIzumi, N-
dc.date.accessioned2022-02-01T10:20:40Z-
dc.date.available2022-02-01T10:20:40Z-
dc.date.issued2009-
dc.identifier.issn1790-5095-
dc.identifier.urihttp://localhost:80/handle/123456789/886-
dc.description.abstractMany previous studies have been carried on the interaction between river flow and the seepage flow in the environmental point of view, but these hardly touch on the boundary conditions or the limitations for the interactions. The subsurface layer below the river is known as the hyporheic layer and it is a saturated band of sediment that surrounds river flow and forms a linkage between the river and the aquifer. The large velocity difference between the river flow layer and the seepage flow layer causes the instability of the flows. Due to this flow instability, a reciprocating flow motion is generated between the hyporheic layer and the above. Linear stability analysis technique is used to understand the stability of the natural flows in rivers as well as the flows occurred in the air by many researchers. In this study a linear stability analysis is carried out to presents the interaction between the river flow and seepage flow. Reynolds averaged Navier-Stokes equations and Brinkman-Forchheimer equations are used in order to formulate the river flow and seepage flow interaction. The open channel flow is analyzed by mixing length turbulent model and Spectral collocation method incorporated with the Chebyshev polynomials are used to perform the numerical solution of the perturbed equations. Instability diagrams are discussed with several slopes of the layers against the dimensionless particle diameter and wave numbers. It has been noted that the instability occurs even in the range of small dimensionless particle diameter with relatively high wave numbers if there is a seepage layer beneath the flow and the instability region increases with the slope when the wave numbers are at small values.en_US
dc.language.isoenen_US
dc.publisherProceedings of the 6th WSEAS International Conference on FLUID MECHANICSen_US
dc.relation.ispartofseriesProceedings of the 6th International Conference on Fluid Mechanics;Pages 46-51-
dc.subjectriver flowen_US
dc.subjectseepage flowen_US
dc.subjectlinear stability analysisen_US
dc.subjectperturbationsen_US
dc.subjectgrowth rate contoursen_US
dc.titleTheoretical analysis for the interaction between the river flow and the seepage flowen_US
dc.typeArticleen_US
Appears in Collections:Research Papers - Department of Civil Engineering
Research Papers - Open Access Research
Research Papers - SLIIT Staff Publications

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