2137 items

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  Development and Validation of Universal 3D Blast Fragmentation Model cite

  Veljko Lapčević, Slavko Torbica, Miloš Stojanović, Ivica Vojinović (2023)

  Fluid Flow and Transfer Processes, Computer Science Applications,Process Chemistry and Technology, General Engineering, Instrumentation, General Materials Science

  Veljko Lapčević, Slavko Torbica, Miloš Stojanović, Ivica Vojinović. "Development and Validation of Universal 3D Blast Fragmentation Model" in Applied Sciences, MDPI AG (2023). https://doi.org/10.3390/app13148316

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  Convective heat transfer in centrifugal pumps lifted wells: the case of South-Eastern Europe waxy wells cite

  Bojan Martinovic, Marija Živković, Branko Grubač (2021)

  Electric submersible pumps (ESP) are applied in wells where additional energy is needed to ensure discharge of the fluid to the surface through the tubing. At the discharge side of the pump the fluid has bigger velocity, thus the pump induces a forced convection between the fluid and the tubing inner surface. Understanding of convective heat transfer in wellbores and analyses of influential parameters provides a possibility to optimise value of convective heat transfer coefficient in order to avoid ...

  prenos toplote konvekcijom, ESP pumpa, svojstva fluida, problemi u radu bušotine

  Bojan Martinovic, Marija Živković, Branko Grubač. "Convective heat transfer in centrifugal pumps lifted wells: the case of South-Eastern Europe waxy wells" in International Journal of Oil, Gas and Coal Technology, Inderscience Publishers (2021). https://doi.org/10.1504/IJOGCT.2021.10043281

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  Flood protection and water utilization of karst poljes: example of Gatačko Polje, Eastern Herzegovina cite

  Tina Dašić, Ljiljana Vasić (2020)

  Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry,Global and Planetary Change

  Tina Dašić, Ljiljana Vasić. "Flood protection and water utilization of karst poljes: example of Gatačko Polje, Eastern Herzegovina" in Environmental Earth Sciences, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s12665-020-08987-4

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  Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels cite

  Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković (2023)

  drilling fluid formulation, upstream oil and gas, fluid dynamics, fluid loss control, gel

  Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković. "Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels" in SPE Journal (2023)

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  Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia cite

  Jelka Krušić , Biljana Abolmasov, Miloš Marjanović (2021)

  The results of material entrainment analysis in RAMMS debris flow software, as well as numerical models of final flow heights for two case studies from the Republic of Serbia are presented. Both of debris flow cases started with initial sliding of huge volume block, prolonging to behave as flowing process. Results of the analysis showed that entrainment material affects final results of transportation model, runout distance, deposition area and volume of debris flow. In both cases entrainment volume is very ...

  tecišta, zadržavanje nanosa, RAMMS, validacija

  Jelka Krušić , Biljana Abolmasov, Miloš Marjanović. "Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia" in Understanding and Reducing Landslide Disaster Risk. WLF 2020. ICL Contribution to Landslide Disaster Risk Reduction, Springer, Cham (2021). https://doi.org/10.1007/978-3-030-60706-7_25

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  Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides cite

  Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)

  analogno modelovanje, raspodela deformacija, geometrija indentera, Černa i Timok rasedni sistem

  ... partitioning and stress perturbation around stepovers and bends of strike-slip faults: numerical results. Tectonophysics 721, 211–226. Weijermars, R., Schmeling, H., 1986. Scaling of Newtonian and non-Newtonian fluid dynamics without inertia for quantitative modelling of rock flow due to gravity ...
  

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  ... (translation followed by rotation) along the margins of a rigid indenter and the rheological stratification of the deformable area. With respect to the latter, we analysed the influence of the flow in the ductile crust on the transfer and distribution of deformation. We use image correlation techniques for ...
  

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  ... related to the transfer of deformation around the north-western indenter corners, where we interpret the development of splay faults in the brittle layer as an expression of flow in the underlying viscous layer that also affects areas on the adjacent fixed sheet (see Figs. 2c, 7 and 9c). We suggest ...
  

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  Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović. "Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides" in Journal of Structural Geology, Elsevier BV (2021). https://doi.org/10.1016/j.jsg.2021.104386

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  Linearization of Input Signal as a Necessary Tool in Stochastic Modeling of Karst Groundwater cite

  Veljko Marinović (2021)

  Modelling of karst hydrogeological systems is a very complicated task, bearing in mind that for a deterministic model one should know the internal physical processes of precipitation transformation into discharge, while for a stochastic model nonlinear dynamic systems such as karst should be simulated by linear regression equations. Stochastic models need linearization of input time series due to often large residual in the recession period. This occur because the model is not able to absorb single rain episodes, which ...

  karstne podzemne vode, stohastičko modeliranje, transfer funkcije, pokretni prosek

  Veljko Marinović. "Linearization of Input Signal as a Necessary Tool in Stochastic Modeling of Karst Groundwater" in Karst: From Top to Bottom, Belgrade, 6.6.2021., Belgrade : Centre for Karst Hydrogeology (2021)

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  Strain Partitioning Around an Indenter During Oroclinal Bending: Inferences From Field Kinematic Study And Analogue Modeling with Application to the European Carpatho-Balkanides Orogen cite

  Nemanja Krstekanić, Liviu Matenco, Ernst Willingshofer, Marinko Toljić, Uroš Stojadinović (2021)

  Nemanja Krstekanić, Liviu Matenco, Ernst Willingshofer, Marinko Toljić, Uroš Stojadinović. "Strain Partitioning Around an Indenter During Oroclinal Bending: Inferences From Field Kinematic Study And Analogue Modeling with Application to the European Carpatho-Balkanides Orogen" in AGU Fall Meeting 2021, New Orleans, USA, 13.-17.12.2021., AGU (2021)

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  Hypogene speleogenesis related to porphyry magmatic intrusions and its influence on subsequent karst evolution in the Peruvian high Andes cite

  Alexander Klimchouk, David Evans, Sasa Milanovic, Cristian Bittencourt, Mauro Sanchez, F. Carlos Aguirre (2022)

  Earth-Surface Processes

  Alexander Klimchouk, David Evans, Sasa Milanovic, Cristian Bittencourt, Mauro Sanchez, F. Carlos Aguirre. "Hypogene speleogenesis related to porphyry magmatic intrusions and its influence on subsequent karst evolution in the Peruvian high Andes" in Geomorphology, Elsevier BV (2022). https://doi.org/10.1016/j.geomorph.2022.108488

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  Evaluation of the effects of wastewater heat pump integration into district heating systems by simulation cite

  Dejan Ivezić, Marija Živković, Dimitrije Manić, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović (2022)

  The integration of wastewater heat pumps (using purified water) in district heating systems is analyzed in this paper. The simulation procedure is proposed to analyze the impacts of stochasticity of purified water temperature and flow to heat pump integration and operation. The analysis includes calculation of the daily and seasonal coefficient of performance, as well as fossil fuel savings and CO2 emission reduction due to wastewater heat pump use. The proposed procedure is implemented for the case study in ...

  otpadne vode, toplotna pumpa, daljinsko grejanje, simulacija

  ... with a two-stage Figure 5 Daily water temperature at the discharge of WWTP compressor and with ammonia as a working fluid is selected. This heat pump corresponds to the average flow rate of purified water in the considered period (683 m 3 /h). To achieve optimal system operation (maximizing ...
  

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  ... temperature and is relatively predictable, the water flow is characterized by significantly greater variation and unpredictability. As an illustration, the variation of flow in the 2019/2020 heating season is presented in Fig. 6. The average ratio of hourly maximum and minimum flow during the day ...
  

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  ... higher than 5 and in extreme cases even higher than 10. Figure 6 Average, minimal and maximal hourly water flow at the discharge point of WWTP Stochasticity of a flow and temperature variability causes the variability of the recoverable heat potential of purified water, and consequently, ...
  

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  Dejan Ivezić, Marija Živković, Dimitrije Manić, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović. "Evaluation of the effects of wastewater heat pump integration into district heating systems by simulation" in Thermal Science, National Library of Serbia (2022). https://doi.org/10.2298/TSCI220813168I

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  Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention cite

  Milica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović (2023)

  Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...

  Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol Injection

  Milica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović. "Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention" in Underground Mining Engineering, Beograd : Rudarsko-geološki fakultet (2023)

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  The Flow Conditions in the Epikarst Zone of a Karst Aquifer. Case Study: Suva planina Mt., East Serbia cite

  Branislav Petrović (2023)

  The epikarst as a part of the karst aquifer represents a complex point of contact and mixing of unconsolidated material from the terrain surface, carbonate rocks altered by “corrosive” water, flora and fauna (and remains of), which is partially saturated with groundwater. Significant amounts of (plant accessible) water, and other solutes and particles, can be stored in this zone for extended periods of time. Thus, attenuation or biochemical processes could start in this layer and change quality of infiltrated ...

  epikarst, tracer test, shallow cave, Suva Planina Mt., Serbia

  Branislav Petrović. "The Flow Conditions in the Epikarst Zone of a Karst Aquifer. Case Study: Suva planina Mt., East Serbia" in International Scientific Conference "Man and Karst 2022", CIRS - Centro Ibleo di Ricerche Speleo-Idrogeologiche (2023)

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  A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor cite

  Miloš Milenković, Miloš Gligorić, Nebojša Bojović, Zoran Gligorić (2023)

  železnica, prekogranični teretni saobraćaj, ARIMA, LSTM, SSA

  Miloš Milenković, Miloš Gligorić, Nebojša Bojović, Zoran Gligorić. "A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor" in Transportation Planning and Technology, Informa UK Limited (2023). https://doi.org/10.1080/03081060.2023.2245389

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  Ефикасност дистрибуције и коришћења природног гаса у домаћинствима cite

  Dejan Brkić (2010-03-30)

  Природни гас ће се у будућности све више користити као енергент за подмиривање грејних потреба становништва у српским градовима. Стога је потребно изнаћи најповољнији начин употребе природног гаса. Природни гас се може користити за подмирење грејних потреба становништва на два дијаметрално супростављена начина, и то директно, тако што би се гас директно уводио у зграде путем дистрибутивног система за снабдевање гасом и затим сагоревао у гасном котлу којим је сваки стан опремљен (гасни дистрибутивни систем), или индиректно, тако што ...

  prirоdni gаs, distribuciја gаsа,grејаnjе, cеvоvоdi, cеvоvоdnе mrеžе,fаktоr trеnjа pri prоtоku fluidа,urbаnizаm

  ... ‐Y., Barry, D.A., Haverkamp, R. 2002. Explicit infiltration equations and the  Lambert W‐function. Advances in Water Resources 25(8‐12), 1119‐1124. (на енглеском)  218. Patankar, S.V. 1980. Numerical heat transfer and fluid flow. 1st ed. Hemisphere  Publishing Corp. Washington DC. (на енглеском)  219 ...
  

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  ... olds number  and/or  relative pipe  roughness  for all  flow  regimes  from  laminar  through partially  (including  ‘smooth’  hydraulic regime) to fully turbulent flow of natural gas or other fluids.     The  friction  factor  is  related  to  fluid‐flow  rate,  fluid  properties  and  pipe  charac ...
  

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  ... rsion of  Chinese journal) 27(7), 137–143. (на енглеском)  91. Datta, A.B., Majumdar, A.K. 1980. Flow distribution in parallel and reverse flow  manifolds. International Journal of Heat and Fluid Flow 2(4), 253–262. (на енглеском)  92. Darcy, H. 1857. Recherches expérimentales relatives au mouveme ...
  

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  Dejan Brkić. "Ефикасност дистрибуције и коришћења природног гаса у домаћинствима" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2010-03-30)

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  The Flow Conditions in the Epikarst Zone of a Karst Aquifer. Case Study: Suva planina Mt., East Serbia cite

  Branislav Petrović (2022)

  The epikarst as a part of the karst aquifer represents a complex point of contact and mixing of unconsolidated material from the terrain surface, carbonate rocks altered by “corrosive” water, flora and fauna (and remains of), which is partially saturated with groundwater. Recharge of karst aquifers, usually, occurs via the unsaturated zone which uppermost part could be epikarst zone. Significant amounts of (plant accessible) water, and other solutes and particles, can be stored in this zone for extended periods ...

  epikarst, tracer test, shallow cave, Suva Planina Mt., Serbia

  Branislav Petrović. "The Flow Conditions in the Epikarst Zone of a Karst Aquifer. Case Study: Suva planina Mt., East Serbia" in International Scientific Conference - Man and Karst 2022, Custonaci, Italy, 12-16.09.2022, Gruppo Grotte Ragusa - C.I.R.S. (2022)

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  Strain partitioning along a curved strike-slip fault system during indentation: inferences from analogue modelling cite

  Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)

  Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović. "Strain partitioning along a curved strike-slip fault system during indentation: inferences from analogue modelling" in GeoMod 2021, Doorn, the Netherlands, 19.-23.9.2021., Utrecht University (2021)

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  Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia cite

  Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin (2013)

  Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin. "Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia" in Hydrogeology Journal, Berlin, Heidelberg : Springer, International Association of Hydrogeologists (2013). https://doi.org/10.1007/s10040-013-1025-9

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  U-Pb zircon geochronology of the Paleogene – Neogene volcanism in the NW Anatolia: Its implications for the Late Mesozoic-Cenozoic geodynamic evolution of the Aegean cite

  E. Yalçın Ersoy, Cüneyt Akal, Ş. Can Genç, Osman Candan, Martin R. Palmer, Dejan Prelević, İbrahim Uysal, Regina Mertz-Kraus (2017)

  The northern Aegean region was shaped by subduction, obduction, collision, and post-collisional extension processes. Two areas in this region, the Rhodope-Thrace-Biga Peninsula to the west and Armutlu-Almacık-Nallıhan (the Central Sakarya) to the east, are characterized by extensive Eocene to Miocene post-collisional magmatic associations. We suggest that comparison of the Cenozoic magmatic events of these two regions may provide insights into the Late Mesozoic to Cenozoic tectonic evolution of the Aegean. With this aim, we present an improved Cenozoic stratigraphy ...

  E. Yalçın Ersoy, Cüneyt Akal, Ş. Can Genç, Osman Candan, Martin R. Palmer, Dejan Prelević, İbrahim Uysal, Regina Mertz-Kraus. "U-Pb zircon geochronology of the Paleogene – Neogene volcanism in the NW Anatolia: Its implications for the Late Mesozoic-Cenozoic geodynamic evolution of the Aegean" in Tectonophysics 717 (2017): 284-301. https://doi.org/10.1016/j.tecto.2017.08.016

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  Coupling of artificial intelligence methods in the development of hybrid intelligent systems cite

  Ranka Stanković, Ivan Obradović, Nikola Lilić (2001)

  In this paper we present an approach which couples various artificial intelligence (AI) methods in the solution of complex problems that cannot adequately be solved by a single AI method. We argue that the resulting, hybrid intelligent systems (HIS) can be successfully implemented with the use of available AI software libraries. Different coupling methods are analyzed and a classification of hybrid systems based on the chosen method is given. Two case studies of hybrid systems used in mining engineering ...

  hibridni inteligentni sistemi, spregnuti sistemi, metode veštačke inteligencije, rudarske primene veštačke inteligencije

  ... methods as well as techniques for securing data and information transfer between system components. As for the implementation issues, we found the approach based on existing software libraries a useful and promising one. Both systems were developed and are operational on single-user PC platforms ...
  

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  ... practice. Planing of required air flow quantities INVENTS ResNet SimVent VENTEX defining basic network resistance ventilation system estimation ventilation simulation Design CFD Estimates estimation of gas and dust emission and temperature conditions flow process modelling using CFD Data ...
  

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  ... following modules: 1) The module for the evaluation of air flow and pressure distribution in the ventilation system; 2) The module for the analysis of the heat pattern in the mine; 3) The module for the analysis of temperature and heat depression distribution in the case of a fire in the mine; ...
  

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  Ranka Stanković, Ivan Obradović, Nikola Lilić. "Coupling of artificial intelligence methods in the development of hybrid intelligent systems" in X Kongres Matematičara, Matematički fakultet, Beograd (2001)

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  Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs cite

  John Nyame (2024)

  The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...

  Carbon Capture, Utilization and Storage

  ... because of heat transfer, fluid friction, and energy dissipation with respect to the surrounding environment. The following equations present the exergy loss in different equipment. The exergy loss in each piece of equipment includes the exergy difference between the inlet and outlet. Here, the ...
  

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  ... the equipment. In the numerator, the first two terms represent the exergy entering and leaving the system with a certain flow rate (n'). The third term is the net power obtainable from the heat transfer (Q'i), and the final term is the net power supplied to the system (-W-j) due to electrical power ...
  

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  ... the formation and to release trapped oil/gas within the pores of the formation. The recovery process allows the injected carbon dioxide to mix with the trapped fluids within the pores and release it for production. The carbon dioxide from the fluid produced at surface is separated and the cycle starts ...
  

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  John Nyame. Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs, 2024