scholarly journals EXPERIMENTAL RESEARCH IN FORMATION BY WAVES OF STABLE PROFILES OF UPSTREAM FACES OF EARTH DAMS AND RESERVOIR SHORES

2011 ◽  
Vol 1 (7) ◽  
pp. 16
Author(s):  
I.J. Popov
Keyword(s):  
Wave Energy ◽  
Wave Action ◽  
Shore Protection ◽  
Earth Dams ◽  
Wave Energy Dissipation ◽  
Stage Of Development ◽  
Initial Stage ◽  
Protective Cover ◽  
Engineering Measure ◽  
Underwater Slope

Within the last few years the Soviet hydraulic engineers have been making continuous efforts to avoid use of concrete slabs and blocks and stone riprap as protective cover of upstream slopes of earth dams and reservoir shores against the disrupting effects of waves generated by the action of wind upon the water surface. Their efforts have been aimed at finding the cheaper procedure. Of all the possible ways of slope and shore protection, an engineering measure, the idea of which consists in distributing the wave energy dissipation over a considerably large portion of a sufficiently gentle slope, should be given a special attention. This measure makes it possible to substantially relieve the protective cover and in some cases to leave the slope uncovered. The possibility of unlined slopes, stable enough agains wave action is proved out by the experience of reservoir operation. Shores and underwater slopes of artificial lakes composed of non-cohesive soils are usually subject to considerable disintegration due to wave action. The process of disintegration which goes on rather fast at the initial stage of lake existence, slowff down with the formation of a flat lake-side shallow, whereon dissipation of wave energy takes place. At a certain stage of development the underwater slope assumes such dimensions and outlines which enable it to dissipate the whole of the wave energy and practically to protect shores from further destruction. The profile of the slope at which it will permanently stand underwater is referred to as the "profile of equilibrium" or "dynamically stable profile". The term "equilibrium" in this case doesn't imply absolute immovability of the material acted on by waves, but stands for such a movable state at which particles of the soil are making oscillatory movements round some middle position without the resultant movement neither towards nor off shore.

scholarly journals WAVE ENERGY DISSIPATION IK ROCKFILL

1972 ◽  
Vol 1 (13) ◽  
pp. 103
Author(s):  
John A. McCorquodale
Keyword(s):  
Wave Energy ◽  
Granular Media ◽  
Present Report ◽  
Internal Flow ◽  
Wave Action ◽  
Darcy Flow ◽  
Water Level Fluctuations ◽  
Wave Energy Dissipation ◽  
The Stability ◽  
External Wave

Very little literature exists on the subject of unsteady non-Darcy flow in coarse granular media. However, unsteady non-Darcy flow is encountered in a few important hydraulic problems, for example, (a) Wave absorption and transmission in rubble-mound break-waters; (b) Water level fluctuations in the rockfill and filter zones of a dam subjected to wave action; (c) Transmission of floods or tides through rockfill dams and causeways, A mathematical model, to simulate the internal Darcy and/or non-Darcy flow in an embankment subjected to wave action, would permit an improved analysis of: the stability of the embankment; the stability of the armour layer; and the absorption and dissipation of wave energy by the rockfill. Since the internal flow in the embankment and the external wave action are interdependent, a complete model requires the simulation of both of these flows. Such a model would permit the computation of wave run-up and reflection. The present report is limited to the simulation of the unsteady internal flow. Heitner and Housner (4), using a finite element method, have developed an external wave action simulation for Tsunamis. The author is presently attempting to couple the internal and external models.

MODELING COMPLEX FLOW INDUCED BY WATER WAVES PROPAGATION OVER SUBMERGED SQUARE OBSTACLES

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Mona Abdeltawab Gomaa ◽  
Tamer HMA Kasem ◽  
Andreas Schlenkhoff
Keyword(s):  
Numerical Model ◽  
Wave Energy ◽  
Water Waves ◽  
Initial Conditions ◽  
Computational Time ◽  
Model Parameters ◽  
Shore Protection ◽  
Complex Flow ◽  
Time Step ◽  
Wave Energy Dissipation

Submerged breakwaters are efficient structures used for shore protection. Many design features of these structures are captured upon modeling wave propagation over submerged square obstacles. The presence of separation vortices and large free surface deformations complicates the problem. A multiphase turbulent numerical model is developed using ANSYS commercial package. Careful domain discretization is done employing suitable mesh clustering to capture high gradients. Various numerical model parameters are provided, including grid size and time step. Special attention is directed towards clarifying turbulence initial conditions. Stable simulation results are obtained within acceptable computational time. Numerical results are validated quantitatively using subsurface measurements. Comparison along continuous horizontal and vertical velocity profiles is provided. Temporal and spatial model resolutions are illustrated for three test cases. The effect of wave period and height is well focused. The unsteady vortical structure is visualized. The incident wave energy is calculated and validated against theoretical values. The wave energy dissipation characteristics are briefly explained.

scholarly journals ARPEC: A NOVEL STAGGERED PERFORATED CAISSON FOR WAVE ABSORPTION AND TIDAL FLUSHING

2020 ◽  
pp. 26
Author(s):  
Paolo Sammarco ◽  
Leopoldo Franco ◽  
Giorgio Bellotti ◽  
Claudia Cecioni ◽  
Stefano DeFinis
Keyword(s):  
Energy Dissipation ◽  
Water Flow ◽  
Wave Energy ◽  
Reflection And Transmission ◽  
Wave Energy Dissipation ◽  
Wave Absorption ◽  
Transmission Coefficients ◽  
Open Sea ◽  
Caisson Breakwater ◽  
Perforated Caisson

An innovative caisson breakwater geometry (patent pending) named "ARPEC" (Anti Reflective PErmeable Caisson) includes openings at all external and internal walls and at lateral (cross) ones, yet in a staggered pattern, to provide a labyrinthian hydraulic communication between the open sea and the internal waters. The complex sinuous water-flow within the consecutive permeable chambers thus favors wave energy dissipation as well as port water flushing and quality, with very low reflection and transmission coefficients. 2D lab model tests demonstrate the system effectiveness.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/PaUsinYO-Zo

scholarly journals Artificial Intelligence to Improve the Business Efficiency and Effectiveness for Enterprises in Kazakhstan

2021 ◽  
pp. 34-41
Author(s):  
Mohamed Hamada ◽  
Daniya Temirkhanova ◽  
Diana Serikbay ◽  
Sanzhar Salybekov ◽  
Saltanat Omarbek
Keyword(s):  
Artificial Intelligence ◽  
Legal Framework ◽  
Legal Aspects ◽  
Stage Of Development ◽  
Initial Stage ◽  
Efficiency And Effectiveness ◽  
Business Efficiency ◽  
Big Picture ◽  
Data Extracting ◽  
Goals And Objectives

The main objective of the research is identifying the effectiveness of artificial intelligence in the business sphere of Kazakhstan. The urgency of this problem is due to the fact that the Kazakhstani market for artificial intelligence is at the initial stage of development. The main obstacle to the introduction of artificial intelligence is the unpreparedness of managers of small and medium-sized businesses for the application of artificial intelligence technologies and, of course, the high cost of their implementation. In the study, we proceeded from the key thesis that business in Kazakhstan is striving for digital transformation. We set a goal to determine the attitude and degree of readiness of Kazakhstani business to the implementation and practical application of artificial intelligence, to describe the cases of using artificial intelligence by Kazakhstani business, to identify the main questions that arise in business at this stage, to study the legal aspects of using artificial intelligence in business and to present the big picture compliance / inconsistency of the existing legal framework with the goals and objectives of the development of artificial intelligence, provide recommendations for eliminatinge xisting barriers and stimulating businesses to implement the technology. Within the framework of this study, the concept of artificial intelligence is defined in its broadest sense - as a set of technologies for processing various types of data and information, in particular those capable of interpreting such data, extracting knowledge and using it to achieve certain goals.

scholarly journals Initial stage of development and migratory behavior of Toxocara canis larvae in BALB/c mouse experimental model

2008 ◽  
Vol 7 (2) ◽  
pp. 444-450 ◽  
Author(s):  
M.L. Camparoto ◽  
B. Fulan ◽  
C.M. Colli ◽  
M.L. Paludo ◽  
A.L. Falavigna-Guilherme ◽  
...  
Keyword(s):  
Experimental Model ◽  
Toxocara Canis ◽  
Migratory Behavior ◽  
Stage Of Development ◽  
Initial Stage

scholarly journals Study on the development of nanotechnology in advanced countries and in Brazil

2009 ◽  
Vol 45 (2) ◽  
pp. 189-200 ◽  
Author(s):  
Carolina Fracalossi Rediguieri
Keyword(s):  
Reference Lists ◽  
Scientific Literature ◽  
Developed Countries ◽  
Public And Private ◽  
Stage Of Development ◽  
Research Institutes ◽  
Initial Stage ◽  
Private Investments ◽  
The World ◽  
The Developed Countries

The study shows how nanotechnology evolves in developed countries and Brazil, raising aspects of private and governmental initiatives. The investigation was based in scientific literature, electronic articles and conference reports. Several sources of literature were used, including electronic databases and reference lists. By this study, it was observed that, although nanotechnology is in initial stage of development all over the world, the developed countries have had growing public and private investments in the area each year. In those countries, there is a concern toward both, the formation of specialists in nanotechnology and the transference of technology developed in universities and research institutes to industry. In Brazil, the study showed that despite the growing concern of investigators, national research centers and financial centers toward the development of the nanotechnology, there is still a need for more investment and formation of area specialists.

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