Modeling flow characteristics of a fractured medium overlaid by a sedimentary porous medium: Application to borhole RCF 3 pump test in sellafield area (UK)

2002 ◽  
Vol 6 (3) ◽  
pp. 347-358
Author(s):  
Woo Chang Jeong ◽  
Jai Woo Song
Keyword(s):  
Porous Medium ◽  
Flow Characteristics ◽  
Fractured Medium ◽  
Pump Test ◽  
Modeling Flow

The Characteristics of Porous Solar Wall Heating System with Localized UFAD

2012 ◽  
Vol 178-181 ◽  
pp. 237-243
Author(s):  
Li Ouyang ◽  
Wei Liu
Keyword(s):  
Heat Transfer ◽  
Porous Medium ◽  
Saturated Porous Medium ◽  
Flow Characteristics ◽  
Heating System ◽  
Physical Models ◽  
Air Distribution ◽  
Cable System ◽  
Wall Heating ◽  
Solar Wall

In this paper, the physical models of the porous solar wall heating system with localized underfloor air distribution (UFAD) are established. Based on Brinkman-Forchheimer Extended Darcy and energy two-equation models for saturated porous medium, the influences of the structure of underfloor space on the heat transfer and flow characteristics of the system are simulated, analyzed and compared.The results show that the underfloor space with rational partition is good for improving the heat transfer and flow characteristics of system, and maintaining the cable system in the underfloor space.

Modeling Flow Characteristics of Reactor Sumps

1982 ◽  
Vol 108 (3) ◽  
pp. 169-184
Author(s):  
James B. Nystrom ◽  
Mahadevan Padmanabhan ◽  
George E. Hecker
Keyword(s):  
Flow Characteristics ◽  
Modeling Flow

scholarly journals Simulating the Filtration Effects of Cement-Grout in Fractured Porous Media with the 3D Unified Pipe-Network Method

Processes ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 46 ◽  
Author(s):  
Zizheng Sun ◽  
Xiao Yan ◽  
Weiqi Han ◽  
Guowei Ma ◽  
Yiming Zhang
Keyword(s):  
Porous Medium ◽  
Cement Grout ◽  
Pipe Network ◽  
Grout Injection ◽  
Two Phase ◽  
Penetration Process ◽  
Fractured Porous Medium ◽  
Fractured Medium ◽  
Network Method ◽  
Porosity And Permeability

In grouting process, filtration is the retention and adsorption of cement-grout particles in a porous/fractured medium. Filtration partly/even completely blocks the transportation channels in the medium, greatly decreasing its permeability. Taking into account filtration effects is essential for accurately estimating the grout penetration region. In this paper, the 3D unified pipe-network method (UPM) is adopted for simulating 3D grout penetration process in a fractured porous medium, considering filtration effects. The grout is assumed to exhibit two-phase flow, and the filtration effects depend on not only the concentration and rheology of the grout but also the porosity and permeability of the fractured porous medium. By comparing the model with the experimental results, we firstly verify the proposed numerical model. Then sensitivity analysis is conducted, showing the influences of grout injection pressures, the water–cement ratios of grout (W/C) and the grout injection rates on filtration effect. Finally, the grout filtration process in a complex 3D fractured network is simulated, indicating that the size of the grout penetration region is limited due to filtration.

Experiments on Coupled Parallel Flows in a Channel and a Bounding Porous Medium

1970 ◽  
Vol 92 (4) ◽  
pp. 843-848 ◽  
Author(s):  
G. S. Beavers ◽  
E. M. Sparrow ◽  
R. A. Magnuson
Keyword(s):  
Porous Medium ◽  
Flow Characteristics ◽  
Porous Wall ◽  
Transition To Turbulence ◽  
Channel One ◽  
Turbulent Transition ◽  
Parallel Flows ◽  
Lower Reynolds Number ◽  
Theoretical Predictions ◽  
Walled Channel

Experiments were performed to study the laminar flow characteristics and the laminar-turbulent transition in a parallel-plate channel, one of whose bounding walls is a porous medium. The flow regime investigated herein is characterized by parallel, unidirectional, fully developed flows in the channel and the porous medium. The experimental results for the laminar regime were found to be in excellent accord with theoretical predictions based on a model which admits a slip velocity at the surface of the porous material. The effect of the presence of the porous wall is to increase the mass flow and decrease the friction factor relative to the corresponding quantities for a solid-walled channel. In addition, transition to turbulence occurs at a lower Reynolds number owing to the presence of the porous wall.

scholarly journals Modeling and Computation of Flow in a Passage With 360° Turning and Multiple Airfoils

1991 ◽  
Author(s):  
W. Shyy ◽  
T. C. Vu
Keyword(s):  
Porous Medium ◽  
Numerical Modeling ◽  
Detailed Analysis ◽  
Flow Condition ◽  
Global Analysis ◽  
Three Dimensional ◽  
Flow Characteristics ◽  
Hydraulic Turbine ◽  
The Individual ◽  
Spiral Casing

Numerical modeling of the three-dimensional flows in a spiral casing of a hydraulic turbine, containing a passage of 360-degree turning and multiple elements of airfoils (the so-called distributor), is made. The physical model is based on a novel two-level approach, comprising of (1) a global model that adequately accounts for the geometry of the spiral casing but smears out the details of the distributor and represents the multiple airfoils by a porous medium treatment, and (2) a local model that performs detailed analysis of flow in the distributor region. The global analysis supplies the inlet flow condition for the individual cascade of distributor airfoils, while the distributor analysis yields the information needed for modeling the characteristics of the porous medium. Comparisons of pressure and velocity profiles between measurement and prediction have been made to assess the validity of the present approach. Flow characteristics in the spiral casing are also discussed.

scholarly journals Modeling flow in anisotropic porous medium with full permeability tensor

2019 ◽  
Vol 1324 ◽  
pp. 012054 ◽  
Author(s):  
Jie Cao ◽  
Hui Gao ◽  
Liangbin Dou ◽  
Ming Zhang ◽  
Tiantai Li
Keyword(s):  
Porous Medium ◽  
Permeability Tensor ◽  
Anisotropic Porous Medium ◽  
Modeling Flow
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