Title
Bridging Field and Laboratory Permeabilities of Pervious Pavement Mixtures Using XRCT-Based Numerical Modeling
Author
Jagadeesh, A. (TU Delft Pavement Engineering)
Ong, G. P. (National University of Singapore)
Su, Y. M. (National Kaohsiung University of Science and Technology)
Date
2024
Abstract
Drainage capacity of pervious pavement mixtures is commonly measured using a falling head permeameter at hydraulic heads much higher than expected in the field. Recent advancements in computational fluid dynamics (CFD)- and X-ray computed tomography (XRCT)-based modeling eliminates the laboratory challenges of maintaining lower hydraulic heads. However, improper characterization in digital image processing (DIP) and finite-volume simulations resulted in significant errors in permeability measurements and fluid flow behavior. In addition, past studies have identified non-Darcy fluid flow characteristics in pervious pavement mixtures following the Izbash and Forchheimer laws. This paper attempts to bridge this research gap by comparing the Darcy and non-Darcy permeability parameters at different laboratory and field hydraulic heads using advanced XRCT-based modeling. It was found from the analyses that the use of laboratory hydraulic head could result in significant underestimation of permeability parameters compared with the field hydraulic heads for Darcy and Izbash equations (by up to 73%), and overestimation for Forchheimer equations (by up to 216%). Fluid flow behavior in pervious mixtures was found to be in transition flow regime (neither laminar nor turbulent) at both laboratory and field hydraulic gradients. Overall, this study can help in a better fundamental understanding of the current limitations of laboratory measurements and the need for XRCT-based numerical modeling to bridge field and laboratory permeabilities of pervious pavement mixtures.
Subject
Field hydraulic heads
Finite-volume simulations
Medical X-ray computed tomography (XRCT)
Non-Darcy permeability
Pervious pavement
To reference this document use:
http://resolver.tudelft.nl/uuid:0c332370-5673-48e9-894a-66d70de5c225
DOI
https://doi.org/10.1061/JMCEE7.MTENG-16311
Embargo date
2024-07-24
ISSN
0899-1561
Source
Journal of Materials in Civil Engineering, 36 (4)
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2024 A. Jagadeesh, G. P. Ong, Y. M. Su