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Упит dcterms_subject_txt:Fluid Flow and Transfer Processes

2357 items

  • Numerical modeling of Selanac debris flow propagation using SPH code

    Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi (2021)
    The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...
    debris flow, modelling, SPH code, DEM
    ... poorly sorted material, started to flow down the slope as a result of motion of solid and fluid phase. Different mechanisms, rheological and numerical models are used in this area of research. Generally, there are mainly two groups of models used for modeling on flow type landslides: empirical-statistical ...
    ... 177-215. Takahashi, T. (2007). ‘’Debris Flow: Mechanics, Prediction and Countermeasures’’. Annual Review of Fluid Mechanics 13 (1): 57-77. Zienkiewicz, O.C., Shiomi, T. (1984). ‘’Dynamic behavior of saturated porous media; The generalized Biot formulation and its numerical solution’’. Int. J. Numer ...
    ... fields of research, and it is found very suitable in different parts of fluid mechanics. Its main difference from other most used methods like finite element and finite difference methods, is in absence of numerical grid, and while mass is presented with particles of solid and fluid phase. Each particle ...

  • Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils

    Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)
    MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii
    ... can induce the desired amount and characteristics of CaCO3 precipitate in variable environmental conditions, offers potential for high-efficiency processes in different fields such as civil engineering, bioremediation, and biotechnological applications, geotechnical and ecological engineering, bio-based ...
    ... Study of mural painting isolates, leading to the transfer of ‘Bacillus maroccanus’ and ‘Bacillus carotarum’ to Bacillus simplex, emended description of Bacillus simplex, a re-examination of the strains previously attributed to ‘Bacillus macroides’ and description of Bacillus muralis sp. nov. Int. J. ...
    ... urease producers has been observed as the Michaelis-Menten model and described by the highest enzyme reaction rate (vmax) and the half-saturation coefficient (Km) [11]. When it comes to the use of bacteria in engineered MICP processes, the selection of bacteria is based on some beneficial traits that ...

  • Centar za hidrogeologiju karsta - 15 godina nauke i struke

    urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović (2023)
    Centar za hidrogeologiju karsta
    ... meters. This device was constructed and successfully used for the first time in 2014. The gripper Was used several more times in wells with a diameter from 140 mm to 300 mm, and up to a depth of 100 meteTs. Research and monitoring of a spring discharge and flow (karst springs, springs, watercourses) ...
    ... impeller) for flow measurement type SEBA (Seba Hydrometrie Z6) for quantities from a few tens to several thousand 1/s. Recently, the CKH has been practicing the installation of digital flow meters (the Stingray flow meter) as a reliable and very precise procedure with a step of flow measurement of ...
    ... different aspects and with the application of different methods. This strengthened not only the scientific structure of the Centre, but also the basis for further expansion and transfer of knowledge in this multidisciplinary discipline. In addition to working together in high education and on individual ...

  • GNSS Time Series as a Tool for Seismic Activity Analysis Related to Infrastructure Utilities

    Sanja Tucikešić, Ankica Milinković, Branko Božić, Ivana Vasiljević, Mladen Slijepčević (2021)
    GNSS, Time series, Seismic deformations, Earthquake, Infrastructure utilities

  • Hidrološki i hidraulički mehanizam isticanja vrela Rijeka Crnojevića

    Golub Ćulafić, Veljko Marinović, Branislav Petrović, Jelena Krstajić (2022)
    Rijeka Crnojevića predstavlja karstno (kraško) vrelo, koje u teritоrijalnom pogledu pripada Opštini Cetinje, u gеоlоškо-tеktоnskоm pоglеdu pripаdа zоni Visоkоg kršа (оblаst stаrе Crnе Gоrе), dоk prema hidrogeološkoj rejonizaciji spаdа u prоstоr Spoljašnjih Dinarida. Izvire iz Obodske (ili Crnojevića) pećine u selu Obod (81 m.n.m.). Voda koja ističe iz Obodske pećine vodi porijeklo od atmosferskih voda, koje se formiraju na prostoru Cetinjskog polja i Dobrskog sela. Vоdе nа оbоdu pоljа pоniru i kreću se uglаvnоm podzemnim kаvеrnаmа i kаnаlimа, nаstаlim ...
    Riјеkа Crnoјеvićа, karstnо vrelo, mehanizmi isticanja

  • Hydrochemical indicators of groundwater flow in the area of “Čukaru Peki” Cu-Au underground mine in eastern Serbia

    Nebojša Atanacković, Vladimir Živanović, Jana Štrbački, Veselin Dragišić, Ivana Cvejić (2022)
    The physical and chemical properties of groundwater, together with the groundwater levels regime and rock hydraulic properties, are often used to understand and conceptualize the hydrogeological system. Prediction of the influence of mining works on groundwater, and vice versa, is a challenge due to significantly altered groundwater flow patterns in the raw materials exploitation areas in relation to natural conditions. Therefore, multiple parameters are assessed and monitored before and during exploitation to properly characterize and quantify the system for ...
    mine water, hydrogeology, multivariant statistics, groundwater inflow, water quality

  • Using Metadata For Content Indexing Within An OER Network

    Ranka Stanković, Olivera Kitanović, Ivan Obradović, Roberto Linzalone, Giovanni Schiuma, Daniela Carlucci (2014)
    ... Brown, J.S. and Hammond, A.L. A Review of the Open Educational Resources (OER) Movement: Achievements, Challenges, and New Opportunities. 2007. http://www.hewlett.org/uploads/files/ReviewoftheOE RMovement.pdf. [2] Using technology for knowledge transfer between academia and enterprises ...
    ... J.S. and Hammond, A.L. A Review of the Open Educational Resources (OER) Movement: Achievements, Challenges, and New Opportunities. 2007. http://www.hewlett.org/uploads/files/ReviewoftheOE RMovement.pdf. Obradovié, I, Stankovic, R., Using technology for knowledge transfer between academia and enterprises ...
    ... (GLC) promotes standardization of learning object metadata vocabularies and federated search processes consistent with several different standards[3]. These standards include Dublin Core, IEEE Learning Object Metadata(LOM) and the Learning Resource Metadata Initiative (LRMI), an extension of schema ...

  • A contribution to the understanding of the flow regime and water balance of the transboundary river Jerma

    Vesna Ristić Vakanjac, Jovana Nikolić, Boris Vakanjac, Marina Čokorilo Ilić, Vida Tanasijević, Milan Đelić (2020)
    flow regime, water balance, river Jerma

  • Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia

    Fen Huang, Ljiljana Vasic, Xia Wu, Jianhua Cao, Saša Milanovic (2019)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Validation of vulnerability assessment by means of the Time Dependent, Model: case study from the Slovenian karst catchment

    Vladimir Živanović, Nataša Ravbar, Igor Jemcov (2019)
    Groundwater vulnerability assessment methods are continuously being developed and existing methods are very often modified to provide better simulation of natural protection conditions and more objective results. Most frequently used methods are based on calculation of predefined parameters influencing water infiltration and underground flow, which can often lead to bias conclusions related to vulnerability evaluations. Some other methods, like the Time Dependent Model (TDM) are based on an approach, where parametrization is obtained at the final stage of the ...
    Ocena ranjivosti podzemnih voda, karstne podzemne vode, TDM metoda, delineacija sanitarnih zona, Slovenački karst

  • Quantitative landslide risk assessment in the city of Tuzla

    Miloš Marjanović, Biljana Abolmasov, Cvjetko Sandić, Miralem Mulać, Petar Begović (2021)
    In the climate-changing conditions, geological environment interacts more dramatically with the urban fabric than before. The urbanization is expansive and more aggressive than before, but so are the weather extremes and long-term climate trends. In effect, many processes which can be triggered by either side, nature or engineering, are becoming more pervasive than before, and such is the case with landslides. Dealing and managing landslides requires few crucial steps, starting from collecting data on landslide location and typology – ...
    "landslides", "risk assessment"
    ... so are the weather extremes and long- term climate trends. In effect, many processes which can be triggered by either side, nature or engineering, are becoming more pervasive than before, and such is the case with landslides. Dealing and managing landslides requires few crucial steps, starting from ...
    ... erosional and landslide processes, subsidence etc. On top of that, unstable or extreme weather in the climate changing conditions can further cause that such engineering activities might be overcompensated, and that natural response might result with disasters (Haque et al. 2016). Planners and dec ...
    ... the quantity of studies and practices of landslide inventorying and susceptibility (Gokceoglu & Sezer, 2009; Sudhakar et al. 2013). Herein, it is attempted to complete the full scope from landslide inventorying to societal landslide risk quantification. Figure 1. Flow chart of the modeling ...

  • Hydrochemical changes and groundwater grouping data by multivariate statistical methods within one karst system: recharge–discharge zone (Eastern Serbia case study)

    Ljiljana Vasić, Dragana Živojinović, Vladana Rajaković-Ognjanović (2020)
    Geochemistry and Petrology

  • Actual contamination of the Danube and Sava rivers at Belgrade (2013)

    Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer (2014)
    rečni sistemi, stanje zagađenja, organski zagađivači, teški metali, skrining analize, non-target screening
    ... drying gas (N2) temperature and flow were 350 °C and 10 L min-1, respectively. The ion trap scanning range was set from 50 to 800 u. Estradiol (α- and β-), estriol, estrone, diethylstilbestrol and ethinyl estradiol were detected in the negative ESI-mode, and norethindrone and progesterone in the positive ...
    ... ethyl acetate and 5 mL of methanol and washed with 10 mL of Milli-Q water. Then 400 mL of river water was loaded under moderate flow (3 mL min-1). SPE cart- ridge was subsequently dried under vacuum for 20 min and then the hormones were eluted with 6 mL of a mixture of ethyl acetate and methanol (5:1) ...
    ... eluents consisted of 30 % acetonitrile and 70 % acetic acid; the flow rate was 1 mL min-1 and the wavelength for thiamethoxam was 247 nm, for imidacloprid 250 nm and for clothianidin 260 nm. The retention time for thiamethoxam was 5.7 min, for imidacloprid 8.5 min and for clothianidin 7.4 min. For qua ...

  • Model of oil and gas pipeline rinsing using the fluid flow

    Batalović Veselin, Danilović Dušan, Živković Marija (2011)

  • Hidrodinamička analiza procesa starenja bunara sa horzontalnim drenovima na beogradskom izvorištu podzemnih voda

    Đorđije M. Božović (2023)
    Predmet istraživanja doktorske disertacije su bunari sa horizontalnim drenovima beogradskog izvorišta podzemnih voda, drugog najvećeg izvorišta ovog tipa na svetu, čiji je režim rada opterećen procesima intenzivnog starenja prisutnog od samog početka formiranja izvorišta, početkom 1950‒ih godina. Istraživanja sprovedena u okviru izrade disertacije su imala za cilj definisanje nove metodologije izučavanja procesa mehaničkog i biohemijskog kolmiranja drenova izradom detaljnih 3D numeričkih hidrodinamičkih modela, upotrebom postojećih, dostupnih i široko rasprostranjenih računarskih programa. Istraživanja su realizovana simulacijom ostvarenog režima podzemnih voda ...
    modeliranje podzemnih voda, hidrauličke karakteristike drenova, koeficijent propusnosti drenova, prifilterska zona drena, hidraulički otpori na drenovima, kolmiranje drenova, ulazne brzine podzemnih voda, MODFLOW, CLN Package
    ... 3D‒Groundwater modeling with PMWIN, A simulation system for modeling groundwater flow and transport processes. Springer Berlin, Heidelberg. DOI: 10.1007/3-540-27592-4 35 Collins, S.L., Houben, G.J, 2020. Horizontal and radial collector wells: simple tools for a complex problem. Hydrogeology Journal ...
    ... Simulating Groundwater Flow and Tightly Coupled Processes Using a Control Volume Finite– Difference Formulation. U.S. Geological Survey, Reston, Virginia. DOI: 10.3133/tm6a45 161 Park, E., Zhan, H., 2002. Hydraulics of a finite–diameter horizontal well with wellbore storage and skin effect. Advances ...
    ... C., Tonkin, M., (Eds.), MODFLOW and More 2015: Modeling a Complex World – IGWMC, Integrated Groundwater Modeling Center, Colorado, 350–353. 39 Davis, K.W., Putnam, L.D., LaBelle, A.L., 2014. Conceptual and numerical models of groundwater flow in the Ogallala and Arikaree Aquifers, Pine Ridge Indian ...

  • BEYOND 2020 - Geology explorations and open pit activities affectation in reclamation designing in Kolubara Coal Mines (KCM) Serbia, new considerations

    Bojan Dimitrijević, Bogoljub Vučković, Radmila Gaćina (2023)
    Geology explorations in KCM runs from 1936. year up to these days and still ongoing. Results in >7,200 drill holes with ≈600,000 m of core drilling and gave lignite ore resources of > 4,1Bt, which 1,15Bt are excavated since 1986. of XIX up to early years of XXI century. For further mining operations in open pits stay 1,5Bt of lignite. Under waste heaps are ≈80 km2, additional 85 km2 should be filled. All of that masses/areas were, are ...

  • Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example

    Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska (2020)

  • Preliminary results of numerical modelling of debris flow - case study Leva reka, Serbia

    Krušić Jelka, Samardžić Petrović Mileva, Marjanović Miloš, Abolmasov Biljana, Miljković Stevan (2018)

  • Karst aquifer impact on the formation of surface runoff: case study of the Resava River catchment, Serbia

    Marina Mitrašinović, Vesna Ristić Vakanjac, Veljko Marinović, Saša Milanović, Ljiljana Vasić, Dušan Polomčić (2022)
    The paper compares the flow regimes of the Resava River at the gauging stations of the Manasija Monastery (upper course) and the town of Svilajnac (lower course). The hydrological analysis encompasses a multiyear period of monitoring (1982–2020). The water budget and baseflow index are assessed for the catchment areas monitored by the Svilajnac station (683 km2) and the Manasija Monastery station (358k m2), considering the overall monitoring period and characteristic years. The results indicate that the specific runoff in ...
    hydrogeological characteristics, water regime, water balance, karst aquifer, Resava catchment area
    ... observed at the two gauging stations, were separated to analyze the flow regime. Table 1 shows discharge Table 1. Baseflow and direct flow volumes and baseflow index volumes for baseflow and direct flow (10% m*), as well as the baseflow indices (BFI). In the select- ed years, the BFI at the Manasija ...
    ... Groundwater flows in developed systems of fractures and caverns. This aquifer is recharged by infiltration of precipitation and water from sink- ing streams. It is discharged via springs, groundwa-– ter flow into adjacent semi-permcable sediments, and in part by evapotranspiration. Springs are gen- ...
    ... Flow regime of the Resava River The following characteristic years were selected to show the flow regime of the Resava River: • Years in which the mean annual discharge was equal to the multiyear average: 2001 (Qav = 3.48 m?/s at Manasija Monastery and Qav = 4.35 m#/s at Svilajnac) and 2018 ...

  • Numerical investigation of caved rock mass friction and fragmentation change influence on gravity flow formation in sublevel caving

    Lapčević Veljko, Torbica Slavko (2017)