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| Dp=0.1016 m (4 inch)
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 | |  | | A set of standard graphs is shown for pipe
diameters of 1 inch, 2 inch, 4 inch, 6 inch, 8 inch, 10 inch and 30 inch pipe
diameters and 0.3 m, 0.4 m, 0.5 m, 0.6 m, 0.7 m, 0.8 m, 0.9 m, 1.0 m, 1.1 m and
1.2 m pipe diameters. The graphs are divided into 8
groups:
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Hydraulic Gradient and Relative Excess
Hydraulic Gradient Graphs, both for constant spatial volumetric concentration
curves and for constant transport volumetric concentration curves, for a
particle diameter of 1 mm, for uniform sands and
gravels.
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Hydraulic Gradient and Relative Excess
Hydraulic Gradient Graphs, both for constant spatial volumetric concentration
curves and for constant transport volumetric concentration curves, for particle
diameters of 0.1 mm, 0.2 mm, 0.3 mm, 0.5 mm, 0.75 mm, 1.0 mm, 1.5 mm, 3.0 mm and
10 mm particle diameters, for uniform sands and gravels.
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Hydraulic Gradient and Relative Excess
Hydraulic Gradient, both for constant spatial volumetric concentration curves
and for constant transport volumetric concentration curves, for a 1 mm
particles, for graded sands and gravels.
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Hydraulic Gradient and Relative Excess
Hydraulic Gradient Graphs, both for constant spatial volumetric concentration
curves and for constant transport volumetric concentration curves, for particle
diameters of 0.1 mm, 0.2 mm, 0.3 mm, 0.5 mm, 0.75 mm, 1.0 mm, 1.5 mm, 3.0 mm and
10 mm particle diameters, for graded sands and
gravels.
- Limit Deposit Velocity curves and Bed Fraction and Slip
Factor curves.
- The transition heterogeneous-homogeneous flow
regimes.
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A comparison of 22 models based on
Hydraulic Gradient and Relative Excess Hydraulic Gradient
curves.
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A comparison of the Wasp, Wilson &
SRC models with the DHLLDV Framework.
The Flow Regime
Diagram
The flow regime diagram is
based on the DHLLDV Framework. Since the DHLLDV Framework has sub-models for all
the flow regimes, for each particle diameter the intersection line speed between
two flow regimes can be determined. Connecting the intersection line speeds for
a range of particle diameters gives a curve showing the transition between two
flow regimes. The flow regime sub-models are based on the dominating physical
behavior. So the sliding bed flow regime is based on energy dissipation due to
sliding friction and the heterogeneous flow regime on potential and kinetic
energy losses. The diagram also shows the Limit Deposit
Velocity.

Material from this website is
free to use, but if you use it in a publication or report please add the
following reference: Miedema,
S.A., "The Delft Head Loss & Limit Deposit Velocity Framework".
www.dredgingengineering.com. Delft, The Netherlands, 2012-now.
Or refer to the
book: Miedema, S.A., "Slurry Transport: Fundamentals, A Historical Overview
and The Delft Head Loss & Limit Deposit Velocity Framework". Delft
University of Technology, Delft, the Netherlands, June
2016.
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01: Dp=0.1016 m, Uniform Sands & Gravels, d=1 mm |
For uniform sands & gravels a set of standard graphs is created for a spatial or transport volumetric concentration Cvs of 17.5% and a particle diameter of d=1 mm.
For other concentrations and particle diameters the graphs/curves may differ, especially the volumetric transport concentration Cvt graphs/curves.
>> Read more
02: Dp=0.1016 m, Uniform Sands & Gravels, 9 Particle Diameters |
For uniform sands & gravels a set of standard graphs is created for a spatial or transport volumetric concentration Cvs of 17.5% and 9 particle diameters.
For other concentrations the graphs/curves may differ, especially the volumetric transport concentration Cvt graphs/curves.
>> Read more
03: Dp=0.1016 m, Graded Sands & Gravels, d=1 mm |
For graded sands & gravels a set of standard graphs is created for a spatial or transport volumetric concentration Cvs of 17.5% and a particle diameter of d=1 mm.
For other concentrations and particle diameters the graphs/curves may differ, especially the volumetric transport concentration Cvt graphs/curves.
>> Read more
04: Dp=0.1016 m, Graded Sands & Gravels, 9 Fractions |
For graded sands & gravels a set of standard graphs is created for a spatial or transport volumetric concentration of 17.5%.
For other concentrations the graphs may differ, especially the volumetric transport concentration graphs.
>> Read more
05: Dp=0.1016 m, The Limit Deposit Velocity, Slip Factor & The Bed Fraction |
For the Limit Deposit Velocity a set of standard graphs is created for a spatial or transport volumetric concentration of 17.5%.
At this concentration the LDV is at a maximum.
For the slip factor and the bed fraction a set of standard graphs is created for a transport volumetric concentration of 17.5%.
For other concentrations the graphs may differ, especially the volumetric transport concentration graphs.
>> Read more
06: Dp=0.1016 m, The Transition Heterogeneous-Homogeneous Flow Regimes |
The transition line speed of the heterogeneous flow regime and the homogeneous flow regime gives an indication of how good or bad different models match. For different models graphs are created for a spatial volumetric concentration of 17.5%.
For other concentrations the graphs may differ, especially the volumetric transport concentration graphs.
>> Read more
10: Dp=0.1016 m, A Comparison Of Different Models |
For different models a set of standard graphs is created for a spatial or transport volumetric concentration of 17.5%.
For other concentrations the graphs may differ, especially the volumetric transport concentration graphs.
>> Read more
11: Dp=0.1016 m, Wasp, Wilson & SRC versus DHLLDV |
For the Wasp, Wilson & SRC models a set of standard graphs is created for a spatial or transport volumetric concentration of 17.5%.
For other concentrations the graphs may differ, especially the volumetric transport concentration graphs.
>> Read more
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