scholarly journals High energy dissipation rates from the impingement of free paper-thin sheets of liquids: A study of the coefficient of restitution of the collision

2021 ◽  
Vol 12 ◽  
pp. 100113
Author(s):  
Robert J. Demyanovich
Keyword(s):  
Energy Dissipation ◽  
High Energy ◽  
Coefficient Of Restitution ◽  
Thin Sheets ◽  
Free Paper ◽  
Dissipation Rates ◽  
High Energy Dissipation

scholarly journals High gas-transfer velocity in coastal regions with high energy-dissipation rates

2008 ◽  
Vol 113 (C11) ◽  
Author(s):  
Tatsuki Tokoro ◽  
Hajime Kayanne ◽  
Atsushi Watanabe ◽  
Kazuo Nadaoka ◽  
Hitoshi Tamura ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
High Energy ◽  
Gas Transfer ◽  
Coastal Regions ◽  
Transfer Velocity ◽  
Gas Transfer Velocity ◽  
Dissipation Rates ◽  
High Energy Dissipation

scholarly journals Optimization of synthesis and peptization steps to obtain iron oxide nanoparticles with high energy dissipation rates

2015 ◽  
Vol 394 ◽  
pp. 361-371 ◽  
Author(s):  
Fernando Mérida ◽  
Andreina Chiu-Lam ◽  
Ana C. Bohórquez ◽  
Lorena Maldonado-Camargo ◽  
María-Eglée Pérez ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Energy Dissipation ◽  
Iron Oxide Nanoparticles ◽  
High Energy ◽  
Oxide Nanoparticles ◽  
Dissipation Rates ◽  
High Energy Dissipation

Radially and Circumferentially Oriented Vortices in Axial Flow Compressors

2014 ◽  
Author(s):  
Andrew Gill ◽  
Theodor W. von Backström ◽  
Thomas M. Harms
Keyword(s):  
Energy Dissipation ◽  
Axial Flow ◽  
High Energy ◽  
Flow Paths ◽  
Flow Rates ◽  
Dissipation Rates ◽  
Compressor Map ◽  
Accident Scenarios ◽  
Four Quadrant ◽  
High Energy Dissipation

This study relates in general to accident scenarios in a closed cycle, nuclear powered, three-shaft, helium gas turbine, and in particular to finding explanations for the high energy dissipation rates at certain compressor operating modes on a four quadrant compressor map. A four quadrant compressor map allows the presentation of all combinations of positive and negative pressure rise and flow direction for positive or negative direction of rotation. The paper presents measured velocity profiles between blade rows, and computed particle path lines in blade passages. They reveal radially oriented vortices between the blades in a blade row when operating at low positive and negative flow rates. These vortices almost completely block the flow, and flow passing through the blade passage has to follow a helical path from casing to hub or vice versa around the vortex. The flow paths through these vortices are linked to the flow paths around circumferential ring vortices near the hub or near the casing in the blade free passages between blades rows. When operating as a turbine under high flow rates the vortices associated with negative incidence stall may be sheltered by the stator blade concave surfaces and deflect the flow in addition to blocking it. The vortex structures appear to be fundamental in nature as they were evident in three quadrants and in two different compressors. The vortices play a role in the high energy dissipation rates in axial flow compressors at very low flow rates, where they operate effectively as flow mixers and not as compressors in possible accident scenarios. They also explain the poor performance as turbine in the fourth quadrant.

Test Study on the Rigidity Degradation and Energy Dissipation of High-Strength Reinforced Concrete Columns with Central Reinforcement

2010 ◽  
Vol 163-167 ◽  
pp. 398-405
Author(s):  
San Sheng Dong ◽  
Zi Xue Lei ◽  
Jun Hai Zhao
Keyword(s):  
Energy Dissipation ◽  
High Strength ◽  
Concrete Columns ◽  
High Energy ◽  
Affecting Factors ◽  
Static Test ◽  
Test Study ◽  
Core Areas ◽  
Energy Dissipation Capacity ◽  
High Energy Dissipation

Based on the pseudo-static test of 6 high-strength RC columns with central reinforcement skeletons, this paper studied their hysterisis performance, degradation of strength and rigidity, and energy dissipation capacity, with the affecting factors analyzed. The result shows that the central reinforcement skeletons can compensate for the low plasticity and brittle failure susceptibility of high-strength concrete so that all the specimens have stable strength, slow rigidity degradation and high energy dissipation capacity at later stage of loading; the larger the core areas the higher the strengths and ductility of the specimens, but slightly faster the degradation of strength and energy dissipation capacity as compared with the specimens with smaller core areas; the spacing of ties, longitudinal reinforcement ratio of core area both influence the strength degradation and energy dissipation capacity of the specimens, but they have little effect on their strengths.

Stiffness, Ductility, and Energy Dissipation of RC Elements under Cyclic Shear

2005 ◽  
Vol 21 (4) ◽  
pp. 1093-1112 ◽  
Author(s):  
Thomas T. C. Hsu ◽  
Mohamad Y. Mansour
Keyword(s):  
Energy Dissipation ◽  
High Energy ◽  
Shear Stresses ◽  
Principal Stresses ◽  
Element Analysis ◽  
Rc Structures ◽  
Cyclic Shear ◽  
Steel Bar ◽  
High Energy Dissipation ◽  
Reversed Cyclic

A new Cyclic Softened Membrane Model (CSMM) was recently developed to predict the stiffness, ductility, and energy dissipation of reinforced concrete (RC) elements subjected to reversed cyclic shear. Using the nonlinear finite element analysis, we can integrate these responses of elements to predict the behavior of a whole structure, such as a low-rise shear wall, subjected to earthquake action. This study of CSMM summarizes systematically the effects of the two primary variables: the steel bar angle with respect to the direction of the applied principal stresses and the steel percentage. The results clearly show that RC structures under cyclic shear stresses could be designed to be very ductile, have large stiffness, and possess high energy-dissipation capacities (just like flexural-dominated elements), if the steel bars are properly oriented in the directions of principal stresses and if the steel percentages are kept within certain limits.

scholarly journals Evaluation of Structural Behavior of Hysteretic Steel Dampers under Cyclic Loading

2020 ◽  
Vol 10 (22) ◽  
pp. 8264
Author(s):  
Sang-Woo Kim ◽  
Kil-Hee Kim
Keyword(s):  
Energy Dissipation ◽  
Shear Force ◽  
High Energy ◽  
Steel Plates ◽  
Structural Performance ◽  
Cyclic Shear ◽  
Energy Dissipation Capacity ◽  
Steel Damper ◽  
Ductile Behavior ◽  
High Energy Dissipation

This study proposes a relatively simple steel damper with high energy dissipation capacity. Three types of steel dampers were evaluated for structural performance. The first damper with U-shape had two vertical members and a semicircular connecting member for energy dissipation. The second damper with an angled U-shape replaced the connecting member with a horizontal steel member. The last damper with D-shape had a horizontal member added to the U-shaped damper. All the dampers were designed with steel plates on both sides that transmitted external shear force to the energy-dissipating members. To evaluate the structural performance of the dampers, an in-plane cyclic shear force was applied to the specimens. The D-shaped damper showed ductile behavior with excellent energy dissipation capacity after yielding without decreasing in strength during cyclic load. In other words, the D-shaped specimen showed excellent performance, with about 3.5 times the strength of the U-shaped specimen and about 3.8 times the energy dissipation capacity due to the additional horizontal member. Furthermore, the efficient energy dissipation of the proposed D-shaped steel damper was confirmed from the finite element (FE) analytical and experimental results.

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