Pipe Flow Models of a Kentucky Limestone Aquifer

Ground Water ◽  
1974 ◽  
Vol 12 (4) ◽  
pp. 202-205 ◽  
Author(s):  
John Thrailkill
Keyword(s):  
Pipe Flow ◽  
Limestone Aquifer ◽  
Flow Models

Numerical Simulation of Seepage Field in Aquifer under the Coal Seam

2014 ◽  
Vol 955-959 ◽  
pp. 3120-3124
Author(s):  
Kai Bian ◽  
Shi Lei Chen ◽  
Xue Yuan Li ◽  
Ying Wang Zhao
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Coal Seam ◽  
Three Dimensional ◽  
Seepage Field ◽  
Limestone Aquifer ◽  
Flow Models ◽  
Hydrogeological Parameters ◽  
Simulation Results ◽  
Technical Basis

In order to figure out seepage field in aquifer under the coal seam, the geology and hydrogeology conditions systematically of study area were analyzed, hydrogeological conceptual model was generalized, mathematical model was built, seepage field of the Taiyuan limestone aquifer was simulated with software Feflow. Simulation results show that hydrogeological parameters of Taiyuan limestone aquifer change greatly in different partitions. The model also indicates the heterogeneity of karst fissure of Taiyuan limestone aquifer. The drainage quantity is from the Ordovician limestone aquifer besides supplying from runoff of upstream and capture excretion of downstream. The research is an attempt to simulate the seepage field in aquifer under coal seam, to some extent, it also provides a technical basis for safe coal mining and as a reference for simulation constructions of three-dimensional groundwater flow models in similar coal mines.

A study of two phase critical pipe flow models for superheated liquid releases

1988 ◽  
Vol 20 ◽  
pp. 273-286 ◽  
Author(s):  
B.C.R. Ewan ◽  
K. Moodie ◽  
P.J. Harper
Keyword(s):  
Pipe Flow ◽  
Superheated Liquid ◽  
Two Phase ◽  
Flow Models

Validation of Equilibrium-Based, One-Dimensional, Two-Phase Pipe Flow Models With Transient, Three-Dimensional, CFD Simulations for Horizontal Flows

2015 ◽  
Author(s):  
Florentina Popa ◽  
Andrey Filippov ◽  
Brent C. Houchens
Keyword(s):  
Pipe Flow ◽  
Mechanistic Model ◽  
Three Dimensional ◽  
Cfd Simulations ◽  
Two Phase ◽  
Horizontal Pipe ◽  
One Dimensional ◽  
Flow Models ◽  
Horizontal Flows ◽  
Closure Relations

One-dimensional (1D), equilibrium-based mechanistic model predictions are compared to three-dimensional (3D) transient computational fluid dynamics results for horizontal two-phase, gas-liquid pipe flow. The 3D regions of interest include both those expected to be in equilibrium conditions and those where transitions between flow regimes occur. Equilibrium simulations, such as those for stratified flow in a horizontal pipe, allow crucial validation of the equilibrium-based closure relations by means of numerical experiments. In the transitional regions, fully 3D, time-dependent numerical simulations provide a means to estimate the error in the equilibrium-based models and suggest how reasonable approximations can be made in these regions.

scholarly journals Maximum Two-Phase Vessel Blowdown From Pipes

1966 ◽  
Vol 88 (3) ◽  
pp. 285-294 ◽  
Author(s):  
F. J. Moody
Keyword(s):  
Pipe Flow ◽  
Reasonable Agreement ◽  
Water Flow Rate ◽  
Water Systems ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Rates ◽  
Flow Models ◽  
Saturated Water ◽  
Constant Area

Existing flow models are applied to predict maximum two-phase flow from a constant area, adiabatic pipe with friction. Graphs are given for maximum steam/water flow rate in terms of pipe f(L/D) and entrance stagnation properties. Theoretical blow-downs are graphed for 1000 and 2000 psia saturated-water systems with f(L/D) ranging from 0.0 to 100. Estimated pipe flow rates and blowdown transients are compared with steam/water data. Reasonable agreement is shown.

Two-phase flow in smooth and rough fractures: Measurement and correlation by porous-medium and pipe flow models

1993 ◽  
Vol 29 (11) ◽  
pp. 3699-3708 ◽  
Author(s):  
M. Fourar ◽  
S. Bories ◽  
R. Lenormand ◽  
P. Persoff
Keyword(s):  
Porous Medium ◽  
Pipe Flow ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Models

Avalanche Stratification - Experimental Tests of the “Metastable Wedge” and “Continuous Flow” Models

2000 ◽  
Vol 627 ◽  
Author(s):  
M. E. Swanson ◽  
M. Landreman ◽  
J. Michel ◽  
J. Kakalios
Keyword(s):  
Continuous Flow ◽  
Granular Media ◽  
Experimental Tests ◽  
Coarse Sand ◽  
Angle Of Repose ◽  
Flow Models ◽  
Maximum Angle ◽  
Stratification Effect ◽  
Upward Moving ◽  
Moving Layer

ABSTRACTWhen an initially homogeneous binary mixture of granular media such as fine and coarse sand is poured near the closed edge of a “quasi-two-dimensional” Hele-Shaw cell consisting of two vertical transparent plates held a narrow distance apart, the mixture spontaneously forms alternating segregated layers. Experimental measurements of this stratification effect are reported in order to determine which model, one which suggests that segregation only occurs when the granular material contained within a metastable heap between the critical and maximum angle of repose avalanches down the free surface, or one for which the segregation results from smaller particles becoming trapped in the top surface and being removed from the moving layer during continuous flow. The result reported here indicate that the Metastable Wedge model provides a natural explanation for the initial mixed zone which precedes the formation of the layers, while the Continuous Flow model explains the observed upward moving kink of segregated material for higher granular flux rates, and that both mechansims are necessary in order to understand the observed pairing of segregated layersfor intermediate flow rates and cell separations.

Flow models for twisted tube heat exchangers

2017 ◽  
Author(s):  
Boris V. Dzyubenko ◽  
Guenrikh A. Dreitser
Keyword(s):  
Heat Exchangers ◽  
Flow Models ◽  
Twisted Tube
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