Phreatic Surface Location after Drawdown
To determine the stability of an earth embankment following rapid drawdown, it is necessary to locate the phreatic surface. Using a finite difference technique, the partial differential...

Field Solutions for Turbulent Seepage Flow
A finite element solution is presented for obtaining field solutions for turbulent flow in porous media. Such problems are frequently of the free surface type. They are associated with...

Steady Seepage toward Circle of Finite Radius
There are a number of practical examples in the theory of steady seepage through porous media in which boundary geometries can be modeled with a circle next to an infinitely long, straight...

Variational Principles for Fluid Flow in Porous Media
Variational methods are being employed to an increasing degree in solving various types of transport problems. It appears that these methods will have increasing use in attacking many...

Radial Flow between Porous and Solid Disks
In preparation for an experimental investigation for the case in which the solid disk rotates while the porous disk remains stationary, theoretical calculations similar to Dorfman's have...

Adsorption of Pesticides by Clay Minerals
The rate and equilibrium of adsorptions of DDT, dieldrin, and heptachlor by illite, kaolinite, and montmorillonite from aqueous pesticidal solutions are evaluated using the batch technique...

Mass Transfer Limitations in Substrate Removal
The existence of an intraparticle diffusional resistance in the uptake of organic substrate by particles of zoogloeal floc is established by comparing the glucose and oxygen uptake rates...

Wave Attenuation by a Porous Walled Breakwater

Wave Attenuation by Porous Walled Breakwater
One method proposed for minimizing the energy content of wind waves reflected from a floating bridge incorporates an L-shaped chamber as a structural part of the bridge. The basic chamber...

Variational Approach to Non-Darcy Flow
The principles of variational calculus are applied to solve the nonlinear partial differential equation for steady and unsteady unconfined non-Darcy flow through porous media. A functional...

Technique for Study of Granular Materials
A technique is proposed for measuring characteristics related to the grain-pore distribution of granular deposits without disturbing the original granular structure. The technique consists...

Clogging of Porous Column of Spheres by Sediment
When a sediment suspension moves downward at a constant laminar flow through a vertical porous column packed regularly with uniform spheres and having critical pores which permit passage...

Physics of Desaturation in Porous Materials
Previous investigations of the hydraulic properties of porous materials have been primarily empirical, i.e., correlations have been based upon experimental data. A physical description...

Analytical Treatment of Two-Phase Infiltration
An approximate analytical treatment for the problem of one-dimensional infiltration into a homogeneous porous medium is presented. Movement of both the air phase and the water phase is...

Finite-Element Analysis of Seepage in Elastic Media
A variational principle is used in conjunction with the finite-element method to solve the initial boundary value problem of flow in a saturated porous elastic medium. This results in...

Nonlinear Flow in Porous Media by Finite Elements
Two commonly suggested forms of the equation linking head loss and velocity for flow of water through coarse granular media are the Forchheimer and exponential relations. Combined with...

Nonlinear Flow in Porous Media
Many investigators are concerned about the validity of the Forchheimer equation which represents the relationship between the velocity of flow and pressure gradient in porous media. A...

Analysis of Infiltration into Draining Porous Media
Numerical analysis was applied to the inundation of a draining sand column. A method was proposed whereby hysteresis could be considered. For Botany sand, after periods of short drainage...

Free-Surface Flow Through Heterogeneous Porous Media
Methods are developed for obtaining finite difference solutions to steady-state, free-surface saturated seepage flows through nonhomogeneous porous media. The formulation considers the...

Laminar Flow Between Rotating Porous Disks
A perturbation solution of the equations of motion for steady, incompressible, laminar flow between a porous rotating disk and a stationary nonporous disk has been obtained. The solution...

 

 

 

 

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