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...

Behavior of Porous Bed Near Flow Singularity
The behavior of a porous bed in the vicinity of a flow singularity that was imposed by the nonorthogonality of a potential line and a streamline was studied theoretically and experimentally....

Batch Adsorption Kinetics in Sewage—Activated Carbon
Batch adsorption experiments using a well-mixed system of secondary effluent domestic waste water and granular activated carbon were performed, and the rate of decay of organic contaminants...

Wave Attenuation by a Porous Walled Breakwater

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

Barriers for Preventing Interceptor Drain Losses
The effectiveness of an interceptor drain is reduced if part of the water is allowed to bypass the drain as saturated flow in the material below the drain or as unsaturated flow above...

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...

Darcy Flow Solutions with a Free Surface
The flow of liquids through porous media is treated as a generalized case of Darcy's Law by dividing the body into finite elements and satisfying continuity of flow and pressure equilibrium...

 

 

 

 

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