First International Conference on MOLDAVIAN RISKS – FROM ...

Recommendations

Info

<strong>First</strong> <strong>International</strong> <strong>Conference</strong> on MOLDAVIAN RISKS - FROM GLOBAL TO LOCAL SCALE 16-19 May 2012, Bacau, Romania STUDIES REGARDING THE BEHAVIOR OF SOLID PARTICLES ON A FLAT OSCILATING SURFACE Ovidiu Bontas 1 , Valentin Nedeff 2 , Emilian Florin Mosnegutu 2 , Mirela Panainte 2 , Oana (Irimia) Tirtoaca 2 1 “George Bacovia” University of Bacau 2 “Vasile Alecsandri” University of Bacau Corresponding author: Bontas Ovidiu, ovidiu.bontas@ugb.ro Abstract: In many industrial applications much of the solid particles are separated by size and for this purpose are used oscillating sieves. The separation on site is a complex process that depends on several factors, such as: - the properties of solids particle which will be separate; - operating regimes of separation equipment. To streamline the process of separation there has been studied the behavior of solid particles on the grain surface, by drawing up a series of mathematical models aimed at identifying the solid particle trajectory. This paper presents a study realized at the "Vasile Alecsandri" University in Bacau, which aimed to determine the ideal particle travel path and for the different types of real particles. To highlight just the oscillating behavior of solid surfaces in the experimental measurements there has been used a blind screen. The experimental determinations were performed on a laboratory bench with flat oscilating sieves. The movement of the solid particle on the working surface has been monitored by two cameras positioned in perpendicular planes, the system aimed at obtaining the spatial trajectory of the particle on the stage. Films obtained from experimental measurements were processed using the software SynthEyes, obtaining files *.txt which contain the data to visualize the trajectory of a particle studied on one working plan. By combining the two paths obtained one can view the three-dimensional trajectory of the solid particle. The present study aimed to determine the trajectory for different types of particles, namely: ideal spherical particle, particle with cube form, various other forms of real particles: soy, pod and grain. Within the experimental measurements, we also studied the solid particle behavior for different operating conditions, namely: - different angles of work surfaces; - different operating modes of the block sieves. After processing the data obtained from experimental measurements one could calculate the velocity of solid particle on a flat oscillating surface. Key words: solid particle, friction coefficient, block sieves. 74
<strong>First</strong> <strong>International</strong> <strong>Conference</strong> on MOLDAVIAN RISKS - FROM GLOBAL TO LOCAL SCALE 16-19 May 2012, Bacau, Romania MODELING HYDRO-MORPHOLOGICAL DATA FROM A HYDROGRAPHIC AREA, USING GIS ARCHYDRO Dan Dascalita “Vasile Alecsandri” University of Bacau, Department of the Environment Engineering and Mechanical Engineering Corresponding author: Dan Dascalita, dan_dsclt@yahoo.com Abstract: An effective flood protection system requires the production of a computer based subsystem, able to model characteristic hydro-morphological data and a technological subsystem using the information received from the computer based subsystem (parameters needed by quick intervention devices to avoid flood damage). In this paper I present the stages of digital modeling using GIS ARCHYDRO components. To exemplify, I chose an experimental area, the hydrographic space of Trebes River, right affluent of Bistrita River. In the design process I used a basemap containing geographic data on water leakage from the Hydrographic Area Siret, which includes the catchment boundaries, water courses and bodies shape files. We also used a geographic database that keeps all data layers and create relationships within the geographical database and a set of features for each of the monitoring stations, part of the geographical database. Through the processing of hydromorphological database, I determined: - the length sections of streams in specified sections of interest; - the areas of river sectors, where all the water leaks are drained from. Modeling is very useful for flood forecasting, for the interpretation of other phenomena produced along the water courses, but also for quick intervention in order to prevent flood damages, accidental pollution, water use restrictions in times of low water, etc. This model can be optimized and can become an expert system in critical cases of damage prevention and defense against waterways emergencies. Key words: Geographic Information System, hydro-morphological, flood. 75
Page 1:
“VASILE ALECSANDRI” UNIVERSITY
Page 4 and 5:
Editors: Mioara Mandea, Gabriel Laz
Page 7 and 8:
First Inte
Page 9 and 10:
First Inte
Page 11 and 12:
First Inte
Page 13 and 14:
First Inte
Page 15 and 16:
First Inte
Page 17 and 18:
First Inte
Page 19 and 20:
First Inte
Page 21 and 22:
First Inte
Page 23 and 24: First Inte
Page 73: First Inte
Page 111 and 112: Sponsors of the conference Sodexo P
show all

First International Conference on MOLDAVIAN RISKS – FROM ...

Create successful ePaper yourself

Delete template?

Save as template?