ZIB

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

Quantitative Estimates of the Uncertainty in the Evaluation of Ground Water Remediation Schemes (2000)

Copty, Nadim K. ; Findikakis, Angelos N.

Oxford, UK : Blackwell Publishing Ltd

Ground water 38 (2000), S. 0

add to mindlist on the mindlist

Details

ISSN: 1745-6584

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences

Notes: Due to the natural heterogeneity of subsurface formations and to the often limited number of data, the definition of the physical and chemical parameters that govern flow and contaminant transport processes is normally characterized by a high level of uncertainty. Uncertainty in the relevant input parameters leads to uncertainty in modeling predictions, which may influence the selection of the optimal remedial alternative. This paper describes a statistical procedure for quantifying the uncertainty in modeling predictions made in support of the evaluation of ground water remediation designs. The hydraulic conductivity field is defined as a random spatial variable whose statistical structure is inferred from the available hydraulic conductivity data. Monte Carlo simulations are used to generate equiprobable multiple realizations of the hydraulic conductivity conditioned on the available hydraulic conductivity measurements. Using Bayes’theorem, probability-based weights for each of the hydraulic conductivity realizations are estimated from “soft” data consisting of historical concentration data and contamination source information. The probability weights are expressed in terms of the simulated concentration distributions and the observed concentration data. Ground water flow and contaminant transport simulation models are then used to probabilistically evaluate and optimize ground water remediation schemes based on the statistical analysis of key model predictions, such as the probability of a particular part of the aquifer being within the capture zone of an extraction well, or the recovered mass of contaminants as a function of time.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1745-6584.2000.tb00199.x

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Numerical simulation of three-dimensional flow in a cavity (1985)

Freitas, Christopher J. ; Street, Robert L. ; Findikakis, Angelos N. ; [et al.]

Chichester : Wiley-Blackwell

International Journal for Numerical Methods in Fluids 5 (1985), S. 561-575

add to mindlist on the mindlist

Details

ISSN: 0271-2091

Keywords: Cavity Flow ; Incompressible Flow ; Control-Volume Formulation ; Navier-Stokes Equations ; QUICK ; Convection Scheme ; Taylor-Görtler Vortices ; Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Previous three-dimensional simulations of the lid-driven cavity flow have reproduced only the most general features of the flow. Improvements to a finite difference code, REBUFFS, have made possible the first completely successful simulation of the three-dimensional lid-driven cavity flow. The principal improvement to the code was the incorporation of a modified QUICK scheme, a higher-order upwind finite difference formulation. Results for a cavity flow at a Reynolds number of 3200 have reproduced experimentally observed Taylor-Görtler-like vortices and other three-dimensional effects heretofore not simulated. Experimental results obtained from a unique experimental cavity facility validate the calculated results.

Additional Material: 15 Ill.