scholarly journals HYDRAULIC PROPERTIES OF SAND SLURRY FLOW IN A PIPE

2020 ◽  
Vol 22 (2) ◽  
pp. 129-144
Author(s):  
O. V. Matvienko ◽  
V. P. Bazuev ◽  
I. S. Cherkasov ◽  
A. E. Litvinova
Keyword(s):  
Pressure Drop ◽  
Hydraulic Resistance ◽  
Effective Viscosity ◽  
Hydraulic Properties ◽  
Mechanical Energy ◽  
Fluid Flow Rate ◽  
Slurry Flow ◽  
Cylindrical Pipe ◽  
Mechanical Energy Dissipation ◽  
Increased Pressure

The sand slurry flow in a cylindrical pipe is investigated using the Ostwald de Waele model. The dependence of the fluid flow rate on the pressure drop is determined, dependencies for the radial distribution of velocity and effective viscosity of flow are obtained. It is shown that the distribution of effective viscosity is characterized by a monotonic increase as it approaches the pipe walls. As the consistency increases, the mechanical energy dissipation of the flow also increases leading to an increase in hydraulic resistance. During the flow of dilatant media with the low nonlinearity index, the hydraulic resistance decreases with increasing pressure drop. When this index is 2, the hydraulic resistance does not depend on the pressure drop and is determined only by the liquid properties and the channel size. At highe values of the nonlinearity index, the increased pressure drop leads to an increase in hydraulic resistance. Keywords

scholarly journals Steady flow of high-paraffin bituminous binder in cylindrical tube in terms of Herschel – Bulkley fluid

2021 ◽  
Vol 23 (4) ◽  
pp. 79-99
Author(s):  
Oleg V. Matvienko ◽  
Alyona E. Litvinova
Keyword(s):  
Fluid Flow ◽  
Pressure Drop ◽  
Velocity Distribution ◽  
Radial Velocity ◽  
Steady Flow ◽  
Hydraulic Resistance ◽  
Flow Rate ◽  
Effective Viscosity ◽  
Cylindrical Tube ◽  
Fluid Flow Rate

This paper deals with the flow of bitumen binder in a cylindrical tube described by the Hershel-Bulkley fluid. The dependence is suggested for the fluid flow rate and the pressure drop. Dependences are also determined for the radial velocity distribution and effective viscosity. It is found that at a low pressure drop, the non-Newtonian properties of the medium lead to a significant hydraulic resistance due to the internal structure. With an increase in the pressure drop, the hydraulic resistance of the flow decreases.

scholarly journals SHVEDOV-BINGHAM MODEL OF STEADY FLOW OF VISCO-PLASTIC BITUMEN BINDER IN CYLINDRICAL TUBE

2019 ◽  
pp. 158-177 ◽  
Author(s):  
O. V. Matvienko ◽  
V. P. Bazuev ◽  
N. R. Sabylina ◽  
A. E. Aseeva ◽  
A. A. Surtaeva
Keyword(s):  
Fluid Flow ◽  
Pressure Drop ◽  
Effective Viscosity ◽  
Cylindrical Tube ◽  
Strain Rates ◽  
Fluid Flow Rate ◽  
Newtonian Flow ◽  
Bingham Model ◽  
Rigid Zone ◽  
Pipe Section

This paper studies the bitumen binder flow in terms of the Shvedov-Bingham model in a cylindrical tube. The dependence of the fluid flow rate on pressure drop is determined as well as the dependences between the radial velocity distribution and effective flow viscosity. Near the wall, the effective viscosity is low. However, in the vicinity of the rigid zone, a significant increase in the effective viscosity is observed. With increasing strain rates the effective viscosity decreases, which is explained by the destruction of the medium microstructure. With the pressure drop, the size of the hard zone decreases. With the increasing yield stress the fluid becomes less mobile, the rigid zone in the centre of the pipe increases in size. In this case, the velocity values decrease over the entire pipe section. Variation in the plastic viscosity does not affect the position of the rigid zone. It is shown that when the Bingam number Bn < 0.1, the non-Newtonian properties of the flow can be ignored. In this case, the Newtonian flow with viscosity mpl should be considered with an accuracy sufficient for engineering calculations.

Transport Characteristics of a Multi-Species Slurry in a Horizontal Pipeline

2001 ◽  
Author(s):  
P. V. Skudarnov ◽  
H. J. Kang ◽  
C. X. Lin ◽  
M. A. Ebadian ◽  
P. W. Gibbons ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Deposition Velocity ◽  
Single Species ◽  
Operating Conditions ◽  
High Level Waste ◽  
Slurry Flow ◽  
Flow Loop ◽  
Waste Transfer ◽  
High Level ◽  
Slurry Transport

Abstract In the course of the U.S. Department of Energy’s (DOE) tank waste retrieval, immobilization, and disposal activities, high-level waste transfer lines have the potential to become plugged. In response to DOE’s needs, Florida International University’s Hemispheric Center for Environmental Technology (FIU-HCET) is studying the mechanism and behavior of pipeline plugging to determine the pipeline operating conditions for safe slurry transport. Transport behavior of multi-species slurry has been studied in a 1-in O.D. pipeline flow loop. The slurry was a five-species mixture of Fe2O3, Al2O3, MnO2, Ni2O3, and SiO2, which simulated actual waste at the Savannah River DOE site. The relationship between the pressure drop in the straight horizontal sections of the flow loop and the mean slurry flow velocity was determined for two solids volume concentrations of 5.2 and 7.8%. Critical deposition velocity was measured from visual observations. An existing empirical model that predicts the pressure gradient for a single-species slurry flow in a horizontal pipeline was used to describe the pressure drop data.

Mechanical Energy Dissipation and Performance in Alpine Ski Racing

2008 ◽  
Vol 40 (Supplement) ◽  
pp. S165 ◽  
Author(s):  
Robert Reid ◽  
Matthias Gilgien ◽  
Tron Moger ◽  
Håvard Tjørhom ◽  
Per Haugen ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Mechanical Energy ◽  
Mechanical Energy Dissipation ◽  
And Performance

Virtual Coupling Control Method for Robotic Gait

2013 ◽  
Vol 278-280 ◽  
pp. 629-632
Author(s):  
Li Peng Yuan ◽  
Amur Al Yahmedi ◽  
Li Ming Yuan
Keyword(s):  
Energy Dissipation ◽  
Hybrid Model ◽  
Control Strategy ◽  
Control Method ◽  
Mechanical Energy ◽  
Control Laws ◽  
Gait Patterns ◽  
Walking Gait ◽  
Virtual Coupling ◽  
Mechanical Energy Dissipation

Here, we consider the walking gait patterns. And we presented a hybrid model for a passive 2D walker with knees and point feet. The dynamics of this model were fully derived analytically. We have also proposed virtual coupling control laws. The control strategy is formed by taking into account the features of mechanical energy dissipation and restoration. And we also prove some walking rules maybe true.

The Use of Nanoporous Materials for Mechanical Energy Dissipation

2017 ◽  
Author(s):  
Isabelle Beurroies ◽  
Damien Presle ◽  
Julien Rodriguez ◽  
Renaud Denoyel
Keyword(s):  
Energy Dissipation ◽  
Mechanical Energy ◽  
Nanoporous Materials ◽  
Mechanical Energy Dissipation

scholarly journals Study of Mechanical Energy Dissipation by Normal and Decalcified Animals Bones

2019 ◽  
Vol 16 (1) ◽  
pp. 113-119
Author(s):  
Abdul Rauf ◽  
Syed Ismail Ahmad
Keyword(s):  
Energy Dissipation ◽  
Viscoelastic Properties ◽  
Applied Load ◽  
Mechanical Energy ◽  
Maximum Energy ◽  
Hysteresis Curve ◽  
Normal Bone ◽  
Dissipation Of Energy ◽  
Mechanical Energy Dissipation ◽  
Energy Dissipated

The energy dissipated properties of normal and decalcified femur, rib and scapula bones of animals ox and camel have been studied by uniform bending technique. A hysteresis curve has been observed between the elevation in bone and load applied. It is observed that the energy dissipated as calculated from the hysteresis loop for rib is more than that of femur and scapula of ox and camel. It has been observed that the dissipation of energy in normal bone is less than that of decalcified bone under the same condition of applied load. The highest energy dissipation was observed in case of rib bone of camel compared to that of any other bone, rib of camel and scapula of ox dissipates maximum energy than femur bones. The study suggests that this technique is simple, elegant and inexpensive besides accurate in determining viscoelastic properties of bone.

scholarly journals Effect of Deep-Defects Excitation on Mechanical Energy Dissipation of Single-Crystal Diamond

2020 ◽  
Vol 125 (20) ◽  
Author(s):  
Huanying Sun ◽  
Liwen Sang ◽  
Haihua Wu ◽  
Zilong Zhang ◽  
Tokuyuki Teraji ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Single Crystal ◽  
Mechanical Energy ◽  
Single Crystal Diamond ◽  
Mechanical Energy Dissipation ◽  
Deep Defects
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