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 (2).jpg) | Summary with 6 pipe diameters
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 | |  | | A summary is given of some graphs for pipe diameters of 1 inch, 2 inch, 4 inch, 8 inch, 0.4 m and 0.8 m. These graphs are:
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The Relative Excess Hydraulic Gradient for constant spatial volumetric concentration curves of 17.5% for uniform sands and gravels.
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The Relative Excess Hydraulic Gradient for constant transport volumetric concentration curves of 17.5% for uniform sands and gravels.
- The Limit Deposit Velocity for uniform sands and gravels.
- The Durand Froude number for the limit deposit velocity for uniform sands and gravels.
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The Bed Height and Slip Factor for uniform sands and gravels.
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The Relative Excess Hydraulic Gradient for both constant spatial (A) and transport (B) volumetric concentration curves of 17.5% for graded sands and gravels for a 1 mm particle d50.
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The Bed Height and Slip Factor for graded sands and gravels for a 1 mm particle d50.
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A comparison of 12 models based on the transition velocity between the heterogeneous and the homogeneous regime.
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A comparison of 22 models based on the Relative Excess Hydraulic Gradient.
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A comparison of Heterogeneous models based on the Relative Excess Hydraulic Gradient.
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 Model". www.dredgingengineering.com. Delft, The Netherlands, 2012-now.
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.jpg) 01 The Relative Excess Hydraulic Gradient, Cvs, Uniform Sands & Gravels |
The Relative Excess Hydraulic Gradient versus the Hydraulic Gradient for a constant spatial volumetric concentration of 17.5%.
Uniform Sands & Gravels.
>> Read more
| 02 The Relative Excess Hydraulic Gradient, Cvt, Uniform Sands & Gravels |
The Relative Excess Hydraulic Gradient versus the Hydraulic Gradient for a constant transport volumetric concentration of 17.5%.
Uniform Sands & Gravels.
>> Read more
| 03 The Limit Deposit Velocity, Uniform Sands & Gravels |
The Limit Deposit Velocity versus the Particle Diameter for different spatial volumetric concentrations.
Uniform Sands & Gravels.
>> Read more
| 04 The Durand Froude number FL for the Limit Deposit Velocity, Uniform Sands & Gravels |
The Durand Froude number FL versus the Particle Diameter for different spatial volumetric concentrations.
Uniform Sands & Gravels.
>> Read more
| 05 The Bed Height & Slip Factor, Uniform Sands & Gravels |
The Bed Height & Slip Factor for different Particle Diameters.
Uniform Sands & Gravels.
>> Read more
| 06A The Relative Excess Hydraulic Gradient, Graded Sands & Gravels, Cvs |
The Relative Excess Hydraulic Gradient versus the Hydraulic Gradient for a 17.5% Spatial or transport volumetric concentration.
Graded Sands & Gravels.
>> Read more
| 06B The Relative Excess Hydraulic Gradient, Graded Sands & Gravels, Cvt |
The Relative Excess Hydraulic Gradient versus the Hydraulic Gradient for a 17.5% Spatial or transport volumetric concentration.
Graded Sands & Gravels.
>> Read more
| 07 The Bed Height & Slip Factor, Graded Sands & Gravels |
The Bed Height & Slip Factor versus the Line Speed for a 17.5% Spatial or transport volumetric concentration.
Graded Sands & Gravels.
>> Read more
| 08 Comparing 12 Models based on the transition heterogeneous-homogeneous |
The Transition Velocity Heterogeneous-Homogeneous versus the Particle Diameter for a constant spatial volumetric concentration of 17.5%.
Some Uniform Sands & Gravels, Others Graded Sands & Gravels.
>> Read more
| 09 Comparing 22 Models based on the Relative Excess Hydraulic Gradient |
The Relative Excess Hydraulic Gradient versus the Hydraulic Gradient for a constant spatial volumetric concentration of 17.5%.
Some Uniform Sands & Gravels, Others Graded Sands & Gravels.
>> Read more
| 10 Comparing Heterogeneous Models based on the Relative Excess Hydraulic Gradient |
The Relative Excess Hydraulic Gradient versus the Hydraulic Gradient for a constant spatial volumetric concentration of 17.5%.
Some Uniform Sands & Gravels, Others Graded Sands & Gravels.
>> Read more
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