scholarly journals Stream Function Models for Analyzing Groundwater Flow through Domains with Anomalous Zones

2002 ◽  
Vol 44 (3) ◽  
pp. 185-198 ◽  
Author(s):  
Katsuyuki FUJINAWA ◽  
Sirou MIKAMOTO
Keyword(s):  
Groundwater Flow ◽  
Stream Function ◽  
Flow Through ◽  
Function Models

scholarly journals A Simple Transient Poiseuille-Based Approach to Mimic the Womersley Function and to Model Pulsatile Blood Flow

Dynamics ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 9-17
Author(s):  
Andrea Natale Impiombato ◽  
Giorgio La Civita ◽  
Francesco Orlandi ◽  
Flavia Schwarz Franceschini Zinani ◽  
Luiz Alberto Oliveira Rocha ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Blood Flow ◽  
Boundary Conditions ◽  
Quadratic Function ◽  
Pulsatile Blood Flow ◽  
Flow Through ◽  
Simplified Analysis ◽  
Function Models ◽  
Flow Reversals

As it is known, the Womersley function models velocity as a function of radius and time. It has been widely used to simulate the pulsatile blood flow through circular ducts. In this context, the present study is focused on the introduction of a simple function as an approximation of the Womersley function in order to evaluate its accuracy. This approximation consists of a simple quadratic function, suitable to be implemented in most commercial and non-commercial computational fluid dynamics codes, without the aid of external mathematical libraries. The Womersley function and the new function have been implemented here as boundary conditions in OpenFOAM ESI software (v.1906). The discrepancy between the obtained results proved to be within 0.7%, which fully validates the calculation approach implemented here. This approach is valid when a simplified analysis of the system is pointed out, in which flow reversals are not contemplated.

scholarly journals Thermal effects of groundwater flow through subarctic fens: A case study based on field observations and numerical modeling

2016 ◽  
Vol 52 (3) ◽  
pp. 1591-1606 ◽  
Author(s):  
Ylva Sjöberg ◽  
Ethan Coon ◽  
A. Britta K. Sannel ◽  
Romain Pannetier ◽  
Dylan Harp ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Groundwater Flow ◽  
Thermal Effects ◽  
Field Observations ◽  
Flow Through

scholarly journals Experimental analysis of groundwater flow through a landslide slip surface using natural and artificial water chemical tracers

2007 ◽  
Vol 21 (25) ◽  
pp. 3463-3472 ◽  
Author(s):  
Stephane Binet ◽  
Herve Jomard ◽  
Thomas Lebourg ◽  
Yves Guglielmi ◽  
Emmanuel Tric ◽  
...  
Keyword(s):  
Groundwater Flow ◽  
Experimental Analysis ◽  
Slip Surface ◽  
Chemical Tracers ◽  
Flow Through ◽  
Artificial Water

scholarly journals Hypothesis of Groundwater Flow through Geological Structures in Guarani Aquifer System (GAS) using Chemical and Isotopic Data

2017 ◽  
Vol 17 ◽  
pp. 136-139 ◽  
Author(s):  
Didier Gastmans ◽  
Andrés Mira ◽  
Roberto Kirchheim ◽  
Luis Vives ◽  
Letícia Rodríguez ◽  
...  
Keyword(s):  
Groundwater Flow ◽  
Isotopic Data ◽  
Geological Structures ◽  
Aquifer System ◽  
Guarani Aquifer ◽  
Flow Through

scholarly journals Groundwater flow equation, overview, derivation, and solution

2021 ◽  
Vol 314 ◽  
pp. 04007
Author(s):  
Lhoussaine El Mezouary ◽  
Bouabid El Mansouri
Keyword(s):  
Heat Transfer ◽  
Differential Equation ◽  
Groundwater Flow ◽  
Numerical Solutions ◽  
Flow Equation ◽  
Heat Transfer Equation ◽  
Flow Equations ◽  
Basic Law ◽  
Flow Through ◽  
Groundwater Flow Equation

Darcy’s law is the basic law of flow, and it produces a partial differential equation is similar to the heat transfer equation when coupled with an equation of continuity that explains the conservation of fluid mass during flow through a porous media. This article, titled the groundwater flow equation, covers the derivation of the groundwater flow equations in both the steady and transient states. We look at some of the most common approaches and methods for developing analytical or numerical solutions. The flaws and limits of these solutions in reproducing the behavior of water flow on the aquifer are also discussed in the article.

scholarly journals Groundwater / meltwater interaction in proglacial aquifers

2019 ◽  
Author(s):  
Brighid É Ó Dochartaigh ◽  
Alan M. MacDonald ◽  
Andrew R. Black ◽  
Jez Everest ◽  
Paul Wilson ◽  
...  
Keyword(s):  
Groundwater Flow ◽  
Direct Evidence ◽  
River Flow ◽  
Temperature Data ◽  
Groundwater Storage ◽  
Groundwater Dynamics ◽  
Aquifer Characteristics ◽  
Flow Through ◽  
And Storage ◽  
Precipitation Events

Abstract. Groundwater plays a significant role in glacial hydrology and can buffer changes to the timing and magnitude of meltwater flows. However, proglacial aquifer characteristics or groundwater dynamics in glacial catchments are rarely studied directly. We provide direct evidence of proglacial groundwater storage, and quantify multi-year groundwater-meltwater dynamics, through intensive and high resolution monitoring of the proglacial system of a rapidly retreating glacier, Virkisjökull, in SE Iceland. Proglacial unconsolidated glaciofluvial sediments comprise a highly permeable aquifer in which groundwater flow in the shallowest 20–40 m of the aquifer is equivalent to 4.5 % (2.6–5.8 %) of mean annual meltwater river flow, and 9.7 % (5.8–12.3 %) of winter flow. Groundwater flow through the entire aquifer thickness represents 9.8 % (3.6–21 %) of annual meltwater flow. Groundwater in the aquifer is actively recharged by local precipitation, both rainfall and snowmelt, and strongly influenced by individual precipitation events. Significant glacial meltwater influence on groundwater within the aquifer occurs in a 50–500 m river zone within which there are complex groundwater / meltwater exchanges. Stable isotopes, groundwater dynamics and temperature data demonstrate active recharge from river losses, especially in the summer melt season, with more than 25 % of groundwater in this part of the aquifer sourced from meltwater. Such proglacial aquifers are common globally, and future changes in glacier coverage and precipitation are likely to increase the significance of groundwater storage within them. The scale of proglacial groundwater flow and storage has important implications for measuring meltwater flux, for predicting future river flows, and for providing strategic water supplies in de-glaciating catchments.

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