Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 11 of 11 for “"DOUBLE POROSITY"”.
-
Shear Dispersion in Double-Porosity Systems
In this study, shear dispersion in double-porosity systems has been investigated. The major focus of this study is determination of dispersion coefficients through development of mathematical models for solute transport in a variety of coupled double-porosity systems by imposing an accurate …
-
ΑΣΤΑΘΗΣ ΡΟΗ ΣΕ ΚΑΡΣΤΙΚΑ ΥΔΡΟΦΟΡΑ ΣΤΡΩΜΑΤΑ ΜΕ ΤΗ ΜΕΘΟΔΟ ΤΩΝ ΠΕΠΕΡΑΣΜΕΝΩΝ ΣΤΟΙΧΕΙΩΝ
… KARST AQUIFER IS STUDIED BY THE MODEL OF DOUBLE POROSITY. THIS IS A CONTINUOUS MODEL BUT IT TAKES INTO ACCOUNT THE HETEROGENEITY OF POROUS MEDIA. IT IS ALSO ASSUMED THAT IN KARST AQUIFERS THE FLOW CAN BE BEYOND THE UPPER LIMIT OF THE VALIDITY OF DARCY'S LAW. THE NONLINEAR EQUATION, WHICH …
-
Infiltration of a Two-State Compressible Fluid Through a Linearly Deformed, Porous, Elastic, Fissured Rock
A theory is formulated for a double porosity medium with two-component vector porosity field. In particular, the performance of a fissured rock medium subjected to a variable load in the space and time domain is considered. The deformation-flow interaction phenomenon is described by five, linear, …
-
Modeling transport of agricultural chemicals in a dual porosity system resulting from macropores
A conceptual model, based upon the bicontinuum double porosity approach, has been developed to simulate water flow and reactive chemical transport in both the soil matrix and the macropore region. Flow of water in both regions is governed by Richards' equation and chemical transport is based upon …
-
A Mathematical Model of Horizontal Wells Productivity and Well Testing Analysis
… testing formulae of horizontal wells in a single porosity system and a double porosity system. Compared with the formulae published in the literature, our formulae, which do not use the sum of infinite series, are more reasonable and easy to be used in well testing analysis.
-
Determination of fractured aquifer characteristics from evaluation of pump tests of wells in the crystalline rocks of the Blue Ridge allocthon
… metamorphic assemblage with the predominance of porosity and permeability of the formations attributed to secondary factors. Aquifer characteristics of transmissivity, storage coefficient, hydraulic conductivity and fracture NL) permeability are determined from evaluation of pump tests conducted …
-
Compositional modeling of gas injection in tight oil reservoirs
… of the fine grid model than the conventional double-porosity approach. The developed simulator MSFLOW-COM is validated with a commercial compositional simulator for both primary depletion and gas injection. After validation, the simulator is used to carry out two case studies. The first case …
-
Hydrogeological characterisation and water supply potential of Lebalelo South, Limpopo Province of South Africa
… 124.7 m2/day. The aquifer types in the area are double porosity aquifer, radial flow aquifer with single porosity. Inductive Coupled Plasma (ICP-MS) was used to measure heavy metals, trace metals and cations while Ion Chromatography (IC) was used to determine anions in groundwater of the study …
-
Mechanistic and probabilistic rate-time analysis of unconventional reservoirs
… slightly compressible single-phase and single porosity diffusivity equation (constant well pressure case). The solutions present the driving force for oil and gas production (drainage mechanism) and its parameters as two desired physical quantities: stimulated volume and characteristic time. …
-
Numerical and analytical vibro-acoustic modelling of porous materials: the Cell Method for poroelasticity and the case of inclusions
… two poroelastic materials under the context of double porosity. The idea of using periodically repeated inclusions of a second porous material into a layer composed by an original material is described. In particular, the problem is addressed considering the efficiency of the analytical method. …
-
Coupled Hydro-Mechanical Modelling of Gas Migration in Saturated Bentonite
… coupled HM frameworks, i.e., one based on double porosity (DP) concept, referred to as coupled HM-DP framework, and the other on phase field (PF) method, referred to as coupled HM-PF framework, are proposed to simulate the gas migration process in saturated bentonite. For the coupled HM-DP …