Skip to Main Content
Skip Nav Destination
ASME Press Select Proceedings
Intelligent Engineering Systems through Artificial Neural Networks, Volume 20
By
Cihan H. Dagli
Cihan H. Dagli
Search for other works by this author on:
ISBN:
9780791859599
No. of Pages:
686
Publisher:
ASME Press
Publication date:
2010

X-ray computed tomography (CT) has been introduced as a method to measure fluid transport at the macropore scale to estimate transport parameters. The objective of this study was to use x-ray CT methods to measure transport of an iodide tracer in soil cores and estimate distributions of solute pore-water velocity and dispersivity. CT-measured breakthrough curve experiments were conducted for eight undisturbed soil cores removed from the surface horizon of a Sarpy loamy sand (Typic Udispamment). Breakthrough experiments with KI were conducted using an x-ray CT scanner. Based on breakthrough curves for each pixel, solute pore-water velocity and dispersivity distributions were determined. CT-measured velocity values were slightly lower (6%) than effluent-estimated values. Frequency distributions of pore-water velocity within the intact core samples were found to be normal except one which was bi-modal. CT-measured dispersivity values were 21% lower than effluent-estimated values, attributed to the additional dispersion occurring through the column end-plate. Dispersivity frequency distributions for the intact soil cores all needed transformations; one needed a 0.25 power transformation to normalize the distribution while the others needed a 0.10 power transformation. This study illustrates that the CT method is useful for evaluating solute transport on a macropore scale for porous materials.

Abstract
Introduction
Materials and Methods
Results and Discussion
Conclusions
References
This content is only available via PDF.
You do not currently have access to this chapter.
Close Modal

or Create an Account

Close Modal
Close Modal