A vector based 3D sediment entrainment model for X-ray computed tomography scanned riverbed grains
A vector based 3D sediment entrainment model for X-ray computed tomography scanned riverbed grains
A vector-based 3D rolling motion sediment entrainment model was developed with application to X-ray computed tomography (XCT) scanned riverbed grains. VectorEntrainment3D extracts grain characteristics and locates all grain-to-grain contact points from XCT scanned images of riverbed samples in an effort to estimate a threshold of entrainment critical shear stress for all surface grains in the sample. A vector-based 3D moment balance about a rotation axis is used to calculate a critical shear stress for each 'viable pair' of contact points for a single coarse surface grain, the smallest value of which is the entrainment threshold solution for that grain. An empirical cohesive force model is used to estimate the resistance force associated with coarse grain contact with a fine-grain matrix. Once a critical shear stress solution is found, three entrainment angles are calculated: the bearing and tilt angles describing the orientation of the grain's plane of rotation, which are determined by two contact points forming the axis of rotation; and the pivot angle describing the forward rotation of the grain, which lies within the plane of rotation.
Voepel, Hal
7330972a-c61c-4058-b52c-3669fadfcf70
Leyland, Julian
6b1bb9b9-f3d5-4f40-8dd3-232139510e15
Hodge, Rebecca
b1d32ae8-df98-4726-a2f7-83f34a01ddfd
Ahmed, Sharif
ddc6bab1-9d76-4391-b7ea-ae68d6f3924d
Sear, David
ccd892ab-a93d-4073-a11c-b8bca42ecfd3
30 April 2018
Voepel, Hal
7330972a-c61c-4058-b52c-3669fadfcf70
Leyland, Julian
6b1bb9b9-f3d5-4f40-8dd3-232139510e15
Hodge, Rebecca
b1d32ae8-df98-4726-a2f7-83f34a01ddfd
Ahmed, Sharif
ddc6bab1-9d76-4391-b7ea-ae68d6f3924d
Sear, David
ccd892ab-a93d-4073-a11c-b8bca42ecfd3
(2018)
A vector based 3D sediment entrainment model for X-ray computed tomography scanned riverbed grains.
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[Software]
Abstract
A vector-based 3D rolling motion sediment entrainment model was developed with application to X-ray computed tomography (XCT) scanned riverbed grains. VectorEntrainment3D extracts grain characteristics and locates all grain-to-grain contact points from XCT scanned images of riverbed samples in an effort to estimate a threshold of entrainment critical shear stress for all surface grains in the sample. A vector-based 3D moment balance about a rotation axis is used to calculate a critical shear stress for each 'viable pair' of contact points for a single coarse surface grain, the smallest value of which is the entrainment threshold solution for that grain. An empirical cohesive force model is used to estimate the resistance force associated with coarse grain contact with a fine-grain matrix. Once a critical shear stress solution is found, three entrainment angles are calculated: the bearing and tilt angles describing the orientation of the grain's plane of rotation, which are determined by two contact points forming the axis of rotation; and the pivot angle describing the forward rotation of the grain, which lies within the plane of rotation.
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Published date: 30 April 2018
Identifiers
Local EPrints ID: 473295
URI: http://eprints.soton.ac.uk/id/eprint/473295
PURE UUID: cbfa0b7e-6796-43ea-abff-35b4915a72c1
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Date deposited: 13 Jan 2023 17:52
Last modified: 17 Mar 2024 03:36
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Contributors
Author:
Hal Voepel
Author:
Rebecca Hodge
Author:
Sharif Ahmed
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