• P. Praks, D. Brkić
    Dejan Brkić's personal collection (2020). 59

  • D. Brkić, P. Praks
    Journal of Marine Science and Engineering (2020). 8(8), article 555

    Abstract
    Ships for drilling need to operate in the territorial waters of many different countries which can have different technical standards and procedures. For example, the European [...]

  • D. Brkić, P. Praks
    Processes (2020). 8(6), article 686

    Abstract
    Measurements of pressure drop during experiments with fan-induced air flow in the open-cathode proton exchange membrane fuel cells (PEMFCs) show that flow friction in its [...]

  • Istraživanja i projektovanja za privredu (2008). 6 (22), 7-18,

  • T. Tanasković, D. Ivezić, M. Živković, D. Brkić
    MAREN 2006, Beograd, Srbija

  • Tehnička dijagnostika (2007). 6 (4), 39-44,

    Abstract
    In this paper is shown short particular review of the book by the same author “Natural Gas as Heating Fuel”. First criterions for decision of appending on distribution [...]

  • T. Tanasković, D. Brkić
    XXXVI Sym-Op-Is 2009, Ivanjica, Serbia

    Abstract
    After the calculation of flows in a looped pipeline distribution network is done, very often velocity of fluid in some of the pipeline branches are undersized while in other [...]

  • D. Brkić, T. Tanasković
    XXXVI Sym-Op-Is 2009, Ivanjica, Serbia

    Abstract
    Calculation of gas i.e. water distribution network is much more complex compared with branch-like distribution pipelines. In this paper is shown one more suitable method in [...]

  • T. Tanasković, D. Brkić
    Termotehnika (2008). 34 (1), 83-92

    Abstract
    Methodology for calculation of Seasonal Efficiency of Comestic Gas Boilers is set by the UK Government's Standard Assessment Procedure for Energy Rating of Dwellings. [...]

  • D. Brkić, T. Tanasković
    XXXV Sym-Op-Is 2008, Soko Banja, Srbija

    Abstract
    Gas distributive network in settlements are usually with contours, which assure that gas is available for consumers from few different directions. By application of concept [...]

  • T. Tanasković, D. Brkić
    171-174, XXXIV Sym-Op-Is 2007, Zlatibor, Srbija

    Abstract
    Methodology for calculating Seasonal Efficiency of Domestic Gas Boilers is set by The UK Government’s Standard Assessment Procedure for Energy Rating of Dwellings. This [...]

  • D. Brkić, T. Tanasković
    167-170, XXXIV Sym-Op-Is 2007, Zlatibor, Srbija

    Abstract
    This paper presents a review of the boilers according to performed seasonal efficiency. Energy Efficiency Bands are assigned, primarily based on the verified values of seasonal [...]

  • T. Tanasković, D. Ivezić, M. Živković, D. Brkić
    165-168, XXXIII Sym-Op-Is 2006 Banja Koviljača, Srbija

  • 4th Sustainable Energy and Environmental Protection SEEP, Bari, Italy, June 29–July 2 2010

    Abstract
    Paper presents the energy policy of the Republic of Serbia with special attention to the energy situation on the government controlled territory. South Serbian autonomous [...]

  • 5th Dubrovnik Conference on Sustainable Development of Energy, Water and Environment Systems- SDEWES, Dubrovnik, Croatia, September 29-October 4 2009

  • 24th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems ECOS, Lausanne, Switzerland, June 13–17 2010

    Abstract
    Today, two very efficient methods for calculation of flow distribution per branches of a looped gas pipeline are available. Most common is improved Hardy Cross method, while [...]

  • D. Tomić, N. Banjac, D. Brkić
    Istraživanje i Projektovanje za Privredu (2005). Journal of Applied Engineering Science 3 (10), 21-27, 2005

  • Facta Universitatis-series: Working and Living Environmental Protection (2009). Facta Universitatis-series: Working and Living Environmental Protection 6 (1 …, 2009

    Abstract
    Gas will increasingly be seen as the fossil fuel of choice, especially when considering environmental impacts. Natural gas is the chance for Serbia for sustainable development [...]

  • Facta universitatis-series: Architecture and Civil Engineering (2008). Facta universitatis-series: Architecture and Civil Engineering 6 (1), 139-153, 2008

    Abstract
    Natural gas can be directly used for heating of flats by gas distribution system. Indirectly, heating power plant can disburse natural gas and deliver hot water or steam for [...]

  • (2010). University of Begrade, Department of Petroleum and Natural Gas Engineering, Belgrade, Serbia

    Abstract
    http://nardus.mpn.gov.rs/123456789/2654

  • Mathematica Balkanica (2012). 26 (3-4), 277-284

    Abstract
    Problem of gas fow in looped network is nonlinear problem and these kind of problems have to be solved using some kind of iterative procedure. For the pipeline network, two [...]

  • Mathematica Balkanica (2012). 26 (3-4), 285-292

    Abstract
    Darcy’s flow friction factor is expressed in implicit form in some of the relations such as Colebrook’s and have to be solved by iteration procedure because the [...]

  • D. Brkić, Ž. Ćojbašić
    Computational Intelligence and Neuroscience (2016). 2016, article 5242596

    Abstract
    Nowadays, the Colebrook equation is used as a mostly accepted relation for the calculation of fluid flow friction factor. However, the Colebrook equation is implicit with [...]

  • International Journal of Heat and Mass Transfer (2016). 93, 513-515

    Abstract
    New explicit approximations to the implicitly given Colebrook equation for flow friction factor are given. They are with improved accuracy compared with the one recently published [...]

  • Spreadsheets in Education (eJSiE) (2016). 9 (2), article 4646

    Abstract
    An example of hydraulic design project for teaching purpose is presented. Students’ task is to develop a looped distribution network for water (i.e. to determinate node [...]

  • A. Aznárez, D. Brkić, S. Contini, M. Christou, S. Tarantola
    (2016). Publications Office of the European Union

    Abstract
    The purpose of this study is to provide the Commission with the information necessary for the assessment of the economic, social, and environmental impacts of a possible extension [...]

  • D. Brkić, Ž. Ćojbašić
    Fluids (2017). 2 (2), article 15

    Abstract
    This paper presents evolutionary optimization of explicit approximations of the empirical Colebrook’s equation that is used for the calculation of the turbulent friction [...]

  • Spreadsheets in Education (eJSiE) (2017). 10 (2), article 4663

    Abstract
    Empirical Colebrook equation implicit in unknown flow friction factor (λ) is an accepted standard forcalculation of hydraulic resistance in hydraulically smooth and [...]

  • D. Brkić, P. Praks
    Applied Sciences (2018). 8 (11), article 2036

    Abstract
    This paper provides a new unified formula for Newtonian fluids valid for all pipe flow regimes from laminar to fully rough turbulent flow.This includes laminar flow; the unstable [...]

  • P. Praks, D. Brkić
    Advances in Civil Engineering (2018). 2018, article 5451034

    Abstract
    The empirical Colebrook equation from 1939 is still accepted as an informal standard way to calculate the friction factor of turbulent flows (4000 < Re < 108) through [...]

  • P. Praks, D. Brkić
    Energies (2018). 11 (7), article 1825

    Abstract
    The 80 year-old empirical Colebrook function ξ, widely used as an informal standard for hydraulic resistance, relates implicitly the unknown flow friction factor λ, [...]

  • P. Praks, D. Brkić
    Processes (2018). 6 (8), article 130

    Abstract
    The Colebrook equation is implicitly given in respect to the unknown flow friction factor λ; λ=ζ(Re, ε∗, λ)which cannot be expressed [...]

  • P. Praks, D. Brkić
    Water (2018). 10 (9), article 1175

    Abstract
    Widely used in hydraulics, the Colebrook equation for flow friction relates implicitly to the input parameters; the Reynolds number, Re and the relative roughness of an inner [...]

  • D. Brkić, P. Praks
    Mathematics (2019). 7 (5), article 410

    Abstract
    This reply gives two corrections of typographical errors in respect to the commented article, and then provides few comments in respect to the discussion and one improved [...]

  • D. Brkić, P. Praks
    Mathematics (2019). 7 (1), article 34

    Abstract
    The Colebrook equation is a popular model for estimating friction loss coefficients in water and gas pipes. The model is implicit in the unknown flow friction factor, f . [...]

  • D. Brkić, P. Praks
    Applied Sciences (2019). 9 (10), article 2019

    Abstract
    Hardy Cross originally proposed a method for analysis of flow in networks of conduits or conductors in 1936. His method was the first really useful engineering method in the [...]

  • D. Brkić, P. Praks
    Fluids (2019). 4 (2), article 73

    Abstract
    The original and improved versions of the Hardy Cross iterative method with related modifications are today widely used for the calculation of fluid flow through conduits [...]

  • D. Brkić, P. Praks
    Computation (2019). 7 (3), article 48

    Abstract
    The logarithmic Colebrook flow friction equation is implicitly given in respect to an unknown flow friction factor. Traditionally, an explicit approximation of the Colebrook [...]

  • D. Brkić, P. Praks
    Fluids (2019). 4 (3), article 114

    Abstract
    Even a relatively simple equation such as Colebrook’s offers a lot of possibilities to students to increase their computational skills. The Colebrook’s equation [...]

  • P. Praks, D. Brkić
    Mathematics (2020). 8(5), article 796

    Abstract
    In this reply, we present updated approximations to the Colebrook equation for flow friction. The equations are equally computational simple, but with increased accuracy thanks [...]

  • P. Praks, D. Brkić
    Mathematics (2020). 8 (1), artice 26

    Abstract
    The empirical logarithmic Colebrook equation for hydraulic resistance in pipes implicitly considers the unknown flow friction factor. Its explicit approximations, used to [...]

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