Free surface flow over finite bed irregularities.
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Free surface flow over finite bed irregularities.

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Published in [Toronto] .
Written in English


  • Channels (Hydraulic engineering),
  • Hydraulics,
  • Water waves

Book details:

Edition Notes

ContributionsToronto, Ont. University.
The Physical Object
Pagination1 v. (various pagings)
ID Numbers
Open LibraryOL19839420M

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Free-Surface Flow: Shallow-Water Dynamics presents a novel approach to this phenomenon. It bridges the gap between traditional books on open-channel flow and analytical fluid : $ Abstract. The finite element method for free surface flows is described. The topics presented include: the use of elements to discretize the solution domain, shape functions to interpolate values within these elements (with emphasis on linear and quadratic shape functions for one-and two-dimensional problems), application of Galerkin’s method to a simple differential equation, as well as to Author: John I. Finnie. Consistently with potential flow theory, boundary layer effects were neglected at the sea bed and at the cylinder surface, but the strong nonlinear motion of the free surface was included.   A novel finite area method (FAM) is utilized to discretize Exner equation on irregular bed surface providing a 3D finite volume-like discretization on curved surfaces. The evolution of the water-sediment interface is captured by a novel vertex-based unstructured mesh dynamic motion solve using Laplace operator with variable diffusivity.

  In Fig. 2 the computed numerical results of free-surface profiles, over the obstacle, under steady flow conditions, at different inflow discharges, are compared with experimental results. Moreover, as the numerical model does not take into account the non-hydrostatic pressure distribution in the curved sill region, an increment of grid points. A FINITE DIFFERENCE MODEL FOR FREE SURFACE GRAVITY DRAINAGE A DISSERTATION Representation of a block containing the free surface. Convention of flow and coordinate directions reservoirs in the oil industry all over the world. The interdependency of oil and gas reserves, price.   Key findings include the observation that flows over a mobile bed attenuate faster (Carrivick et al., ), and peak flow depth was greater and occurs earlier than for those over an. Intense bed-load, or sheet flow, occurs when a free-surface flow of water drives a thick, rapidly sheared layer of water and grains over an erodible granular bed. We examine here the transient case where flow is induced by a sudden dam-break. Aiming for greater detail than achieved previously, we investigate this case using experiment and theory.

capture free surfaces and interfaces especially in the calculation of three-dimensional flow problems. Another widely used free sur-face flow calculation method is the level set scheme. This method makes it relatively easy to capture a free surface accurately, using a function which has zero value contour on the free surface as an identifier. The example selected is of flow over a step. This flow has conceptual simplicity and good experimental data available for validation (see N. Rajaratnam and M.R. Chamani, “Energy Loss at Drops,” J. Hydraulic Res. Vol. 33, p, ). Prototype Hydraulic Flow with Free Surfaces. Figure 1a shows the flow problem after it has reached a steady. Unsteady flow problem is solved separately on two fixed domains Ω 1 (cenomanian aquifer) and Ω 2 (turonian aquifer). Both of them include both saturated and unsaturated zones. Let us call phreatic surface the area where both zones meet. The phreatic surface separates saturated zone p ≥ 0 from unsaturated zone p. The finite difference method has adequate accuracy to calculate fully-developed laminar flows in regular cross-sectional domains, but in irregular domains such flows are solved using the finite element method or structured grids. However, it has become apparent that we can use the finite difference method freely even if domains are complex. The non-slip condition on the wall must be imposed.