Results 221 to 230 of about 288,333 (267)

Conformal Growth of Radial InGaAs Quantum Wells in GaAs Nanowires

The Journal of Physical Chemistry Letters, 2021
GaAs-InGaAs-GaAs core-shell-shell nanowire (NW) structures were grown by gas source molecular beam epitaxy using the selective-area, self-assisted, vapor-liquid-solid method. The structural, morphological, and optical properties of the NWs were examined for different growth conditions of the InGaAs shell.
Nebile Isik Goktas, Vladimir G. Dubrovskii, Ray R. LaPierre   +2 more
openaire   +2 more sources

Multilayer Analytic Element Modeling of Radial Collector Wells

Groundwater, 2005
Abstract A new multilayer approach is presented for the modeling of ground water flow to radial collector wells. The approach allows for the inclusion of all aspects of the unique boundary condition along the lateral arms of a collector well, including skin effect and internal friction losses due to flow in the arms.
Mark, Bakker, Victor A, Kelson, Kenneth H, Luther   +2 more
openaire   +2 more sources

Radial flow with discharging-well and observation-well storage

Journal of Hydrology, 1977
Abstract A simple extension of the Theis equation removes the requirement that discharging wells have infinitesimal diameter. Further, in this extension, observation wells also have finite diameters and storage. Type curves for dimensionless drawdown versus dimensionless time can be calculated for the discharging well and all observation wells for ...
openaire   +1 more source

Research on the Crack Morphology of Radial Well Fracturing

2020
Radial well is analog to ultra-long distance perforation. But the law of crack initiation and propagation of radial well during fracturing is similar to that of regular perforation. However, the diameter and length of radial well is far more than that of regular perforation. Therefore, the influence of radial well to crack initiation and propagation is
Xiao-long Li, Ru-sheng Zhang, Zhan-qing Qu   +2 more
openaire   +1 more source

Design and Use of Radial Collector Wells

Journal AWWA, 1964
This article discusses radial collector wells, horizontal perforated conduits that intercept and collect groundwater derived principally from surface water infiltration. Such supplies are usually found in the sand and gravel deposits underlying, and hydraulically connected with, surface sources such as rivers, lakes, or oceans.
openaire   +1 more source

Radial Flow Analysis of Well Performance

1986
This chapter will serve as an introduction to the subject of pressure analysis in reservoir engineering. The theoretical basis of radial flow analysis and the rudiments of data analysis for build-up and draw-down in oil and gas wells are presented. Well test procedures are briefly discussed for exploration and development wells.
J. S. Archer, C. G. Wall
openaire   +1 more source

Dispersion in radial flow from a recharge well

Journal of Geophysical Research, 1967
The recharge and disposal of treated and untreated waste waters in groundwater aquifers results in a mixing of these waters with the natural groundwater. The distribution and boundaries of the ensuing mixture are determined by the combined mechanisms of convection, dispersion, diffusion, and sorption. In this study, the mass conservation equation for a
John A. Hoopes, Donald R. F. Harleman
openaire   +1 more source

Flow to Wells in the Presence of Radial Discontinuities

Groundwater, 1969
Abstract An analysis is presented for the nonsteady state problem of a well, pumping a constant discharge, and located at the center of a circular aquifer surrounded by a radial discontinuity. On either side of the discontinuity, the transmissibility and the storage coefficient are constant but may have different values from those on ...
openaire   +1 more source

General Heterogeneous Radial and Linear Models for Well Test Analysis

Proceedings of SPE Annual Technical Conference and Exhibition, 1995
Abstract This paper presents a new analytical method for an exact solu-tion of the presure transient problems for general radial and linear models with heterogeneities. In these models, the stora-tivity and the transmissivity coefficients are considered functions of the distance from the well.
M. M. Levitan, G. E. Crawford
openaire   +1 more source

Numerical simulation approach of radial collector well

2011 International Symposium on Water Resource and Environmental Protection, 2011
Based on the analysis of the flow characteristics of radial collector well, a mathematic model was developed by adapting the equivalent hydraulic conductivity and the model of coupled seepage and pipe flow for radial collector well. Through the analysis of the hydro-geological conditions, the manner of radial collector well was proposed to exploit ...
null Chen Peng, null Liu Ji, null Chen Li, null Wang Wei   +3 more
openaire   +1 more source