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Effects of DEM Generating Algorithms on Water Retention Calculations in Polders – A Case Study

Abstract

Digital Elevation Models have been an important topic in the last decades in order to accurately describe one’s surroundings for various purposes. The most wide-spread applications of Digital Elevation Modelling are related to volumetric calculations over large areas, as well as to hydrographic simulations. This paper will analyse the impact of various data interpolation models on the result of volumetric calculations in a longitudinal shaped polder. In order to achieve general conclusions instead of case specific solutions, the raw parametric Digital Elevation Models have been used, rather than the specific parameters suiting the actual scenario. In order to achieve this, data smoothing has also been neglected. The result of the conducted study presents the impact of the digital elevation modelling methods over the volumetric calculations. When applied to the same dataset, the methods yielded different results, partially confirming the predicted usefulness of the algorithms.

Open access
Elements in the Market of the Real Estate Property in Oradea

Abstract

The location of Oradea in western Romania, in a constant development area, correlates with the existing human potential; the area becomes attractive for citizens from other geographic regions who have moved to Oradea. The real estate market of apartments is experiencing an increase reaching new highs in the trim. II 2017. The city of Oradea is part of the cities with economic potential, with the demand for housing. The prices upward trend must be corelated with economic growth and strength in order not to produce a new “crisis” effect.

Open access
Experimental Evaluation a Tensile Strength of PAFSIN Pipes in Different Types of Land

Abstract

Most studies on the PAFSIN pipes were oriented monitoring their behavior in laboratory conditions, focusing on the fluid and less influence on the environment laying on the mechanical properties in the short term then extrapolated mathematical term. Moreover, a large part of these studies refer only to the effect on PAFSIN composite samples without taking into account the specificities induced specific geometry pipeline. In this way, the effect PAFSIN pipes can be overlooked, which in practice can lead to significant errors of design and / or execution. Compared to existing studies, taking into account only the effect of a sealant (generally standardized solutions of acid or base) of the PAFSIN pipes, in the article to present the results of tests conducted on PAFSIN pipes buried in different types of land and attempted to surprise the complexity of the interactions of soil solution to the conduit.

Open access
Integration Issues for Using Innovative Daylighting Strategies in Light Wells

Abstract

“Light well” as one of the most common means of daylight tolls in building, experiences severe limitations and deserve special attention. The question is which strategy is the best for increasing the daylight penetration to the depth of buildings. One of the main challenges in deep plan is to guide daylight into the building core and this can be performed through daylighting strategies, but the choice of the proper innovative daylighting system (IDS) with several parameters is the problem. This paper aims to find elements for optimal choice and selecting context-compatible tools for light well. The result shows that four macro factors were found at the interaction of building and IDS. Identifying the integration components can play an effective role in decision-making or design a new tolls consistent with the physical conditions of light well and building to overcome the daylight crisis.

Open access
Seismic Behavior of RCC Dams Including the Effect of Foundation

Abstract

Roller Compacted Concrete (RCC) dams are actually a combination of concrete dams' safety and procedure of earth dam while accelerating construction and reducing administrative costs, have high safety. And why in the world and Iran, constructing this type of dam has growing trend. The first roller compacted concrete (RCC) dam of Iran (Jegin dam) has come into operation in 2006. In terms of expressed statistics and given that, none of these dams has not been subject to severe earthquake, roller concrete dam operations is not specified in facing with severe earthquake and its merits and faults. Therefore, the need for seismic analysis of these dams in the design, implementation and operation is obvious. In the meantime, the lack of studies on how modeling of roller compacted concrete (RCC) dams using finite element software, especially on how to foundation modeling (dimensions, material properties, interaction of foundation and dam), modeling dam lake (the length of lake, the water level, the interaction between the lake and the dam body) felt. In this study, dynamic analysis of roller compacted concrete (RCC) dam using ABAQUS finite element software and modeling one of the roller compacted concrete (RCC) dams of Malaysia with the change approach of foundation boundary conditions will be considered.

Open access
Seismic Performance of the Pier Considering Structural-Fluid Interaction with ANSYS Software

Abstract

In the present study, as the calculation of forces on the cylindrical structures of the sea has a special complexity, Morrison's mathematical model was used in the software. In addition, the kinematics of water particles is estimated to calculate their acceleration from the fifth-order non-static wave theory (Fenton method). In this paper, the analysis of the pier performance considering structural-fluid interaction using ANSYS soft is presented. Five models with the same period were considered and different wave heights and two different earthquake records of Tabas and Northwich were studied. Finally, node displacement, acceleration and reciprocal interaction forces were extracted and compared with the numerical values. The results indicated that the values of the studied parameters and the type of nodes were similar in the models without a record of earthquakes, but with the estimation of the earthquake, these values would be significant.

Open access
Seismic Safety Evaluation of the Pipelines Network

Abstract

This paper aims at presenting a computational methodology for the seismic evaluation of steel pipelines networks, existing in the urban areas of Romania, characterized by an important seismic hazard. First, a short presentation of the state of the art of critical infrastructure composed of different classes of pipelines system, existing in urban areas, is given. In order to evaluate the seismic safety of existing urban piping network systems as well as different degrees of importance from a seismic design point of view, the paper presents a computational methodology based on Finite Element simulations. For the validation of the proposed methodology, a numerical case study has been performed, which aims to evaluate the seismic behavior of steel pipelines, as part of the network system existing in the North-Eastern region of Romania, characterized by a high seismic hazard. The numerical experiments based on Finite Element Analysis (FEA) methodology allows the evaluating of seismic safety of pipelines network, and can be further useful for monitoring critical infrastructure’s components exposed to strong earthquakes during their life-cycle.

Open access
Separation of Fresh and Saline Water Using by Interpretation of Geoelectric Data (A Case Study of Eshtehard in North of Iran)

Abstract

Groundwater study through the operation of geoelectric, considered one of the best known way in the field. Consideration and accuracy in accurate extraction of water and using the proper equipment and interpret detailed data can reveal high potential of these methods in the best way for underground exploration. This study was conducted to investigate the separation of fresh and saline water, using the analysis and interpretation of geoelectric data collected by the array Schlumberger. Because human needs for fresh water for drinking water, agriculture, animal husbandry and industry, and difficulties in the initial identification layer of saline water in these important activities, find a way to solve these problem is very important. The purpose of case study conducted in southwestern of plains Eshtehard is recognition of border of saltwater and freshwater for wells to provide water for the construction of water wells to water supply for greenhouses exist in the region. In this study, by obtaining data geoelectric and their interpretation, was observed that by increasing the amount of EC (electrical conductivity) due to presence of the solute salts in certain depth of groundwater, sudden drop in specific resistivity be seen in specific range of Probing taken, and according to studies carried out in different regions of the world, these sudden change is known as the boundary separating fresh and saline water, that study and comparison of geophysical data with log obtained from drilled wells in these area, also is a confirmation of these fact.

Open access
Study of Aerosol Charging in Electro-Aerosol Generator

Abstract

The urgency of the study is conditioned by the necessity of perfection of the methods of electro-aerosol disinfection and disinsection of the air and the surfaces of premises, medical and preventive treatment of animals, and plant protection. The objective of the paper is aimed at revealing the regularities of electro-physical processes when charging an aerosol in electro-aerosol generators, improvement of the methods of electro-aerosol generation. The leading approach to the research of this problem is mathematical modelling of electrotechnical, dynamic and kinetic processes in electro-aerosol generators, allowing revealing the basic regularities of electro-aerosol generation. Experimental studies are aimed at assessment of the main characteristic of the electro-aerosol generator – convection current. As a result of the studies, a mathematical model of electro-aerosol generation with the mechanical method of atomization was obtained. The regularities of charging a fluid thread, arising at the edge of the generator, when applying electric field. The configuration of the electric field of cylindrical electrodes, taking into account the influence of the bulk charge of the electro-aerosol cloud, was considered. Electrostatic pressure of the electric field of the generator on fluid streams was taken into consideration. An equation for determining the average radius of drops of the electro-aerosol during mechanical atomization by the perforated cage was obtained. The mathematical model of electro-aerosol generation is obtained in the form of the equation of convection current, being one of the basic characteristics of the process of electro-aerosol generation, allowing defining the efficiency of electrization of aerosol particles and the degree of their fragmentation. Theoretical calculations are verified experimentally. Materials of the paper can be useful for the researchers, post-graduate students, engineers, engaged in designing, manufacturing and exploiting electro-aerosol equipment.

Open access
System of Integrated Energy Supply of Separate Facilities from Renewable Energy Sources

Abstract

The relevancy of the study is due to low efficiency of using solar and geothermal energy in the existing process schemes. In this regard, this article is aimed at revealing the possibilities of using solar and geothermal energy for the integrated energy supply of separate facilities from renewable energy sources. The mathematical simulation method based on the theory of graphs of energy system operation, which makes it possible to analyze the efficiency of the integrated use of solar and geothermal energies for the heat-cold supply of separate facilities, is the main approach to studying this problem. Energy consumption throughout the year and the emergency energy source capacity in “peak” modes were determined based on the developed mathematical model of managing the system of integrated power supply of separate facilities from renewable energy sources plotted with the use of the theory of graphs. The article materials are of practical value for the designers of the systems of integrated heat-cold supply of separate facilities.

Open access