COLLECTIONS

Scope

Dejan Brkić's personal collection contains his aricles published in the open access mode.

Documents published in Scipedia

  • 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 [...]

  • P. Praks, D. Brkić
    Rev. int. métodos numér. cálc. diseño ing. (2020). Vol. 36, (3), 41

    Abstract
    Using only a limited number of computationally expensive functions, we show a way how to construct accurate and computationally efficient approximations of the Colebrook equation [...]

Articles (Documents not available in Scipedia)

  • Discussion of “Friction modeling of flood flow simulations” by Vasilis Bellos, Ioannis Nalbantis, and George Tsakiris

    D Brkić, P Praks

    Journal of Hydraulic Engineering 146 (5), article 07020007, 2020

  • Discussion of “Approximate analytical solutions for the Colebrook equation” by Ali R. Vatankhah

    D Brkić, P Praks

    Journal of Hydraulic Engineering 146 (2), article 07019011, 2020

  • A possible publishing model profitable for authors

    D Brkić

    GRIN Verlag, 2019

  • Correction: Brkić, D., and Praks, P. Accurate and efficient explicit approximations of the Colebrook flow friction equation based on the Wright ω-function. Mathematics 2019, 7, 34

    D Brkić, P Praks

    Mathematics 7 (10), article 951, 2019

  • Discussion of “Economics and statistical evaluations of using Microsoft Excel Solver in pipe network analysis”

    D Brkić

    Journal of Pipeline Systems Engineering and Practice 9 (3), article 07018002, 2018

  • Discussion of “Exact analytical solutions of the Colebrook-White equation”

    D Brkić

    Journal of Hydraulic Engineering ASCE 143 (9), article 07017007, 2017

  • Discussion of “Gene expression programming analysis of implicit Colebrook–White equation in turbulent flow friction factor calculation”

    D Brkić

    Journal of Petroleum Science and Engineering 124, 399-401, 2014

  • Discussion of “Method to cope with zero flows in Newton solvers for water distribution systems”

    D Brkić

    Journal of Hydraulic Engineering 140 (4), 456-459, 2014

  • Very accurate explicit approximations for calculation of the Colebrook friction factor

    Ž Ćojbašić, D Brkić

    International Journal of Mechanical Sciences 67, 10-13, 2013

  • Discussion of “Sustainable electric power system: Is it possible? Case study: Croatia”

    D Brkić

    Journal of Energy Engineering 138 (3), 163-164, 2012

  • Discussion of “Jacobian matrix for solving water distribution system equations with the Darcy-Weisbach head-loss model”

    D Brkić

    Journal of Hydraulic Engineering 138 (11), 1000-1001, 2012

  • Discussion of “Water distribution system analysis: Newton-Raphson method revisited”

    D Brkić

    Journal of Hydraulic Engineering 138 (9), 822-824, 2012

  • Can pipes be actually really that smooth?

    D Brkić

    International Journal of Refrigeration 35 (1), 209-215, 2012

  • Comparison of the Lambert W‐function based solutions to the Colebrook equation

    D Brkić

    Engineering Computations, 2012

  • Determining friction factors in turbulent pipe flow

    D Brkić

    Chemical Engineering N.Y. 119 (3), 34-39, 2012

  • Comments on "Experimental study of the pressure drop in the cathode side of air-forced open-cathode proton exchange membrane fuel cells"

    D Brkić

    International Journal of Hydrogen Energy 37 (14), 10963-10964, 2012

  • Discussion of “Classroom activities to illustrate concepts of Darcy’s Law and hydraulic conductivity”

    D Brkić, V Mitrović

    Journal of Professional Issues in Engineering Education and Practice 137 (1 …, 2011

  • Iterative methods for looped network pipeline calculation

    D Brkić

    Water Resources Management 25 (12), 2951-2987, 2011

  • An explicit approximation of Colebrook's equation for fluid flow friction factor

    D Brkić

    Petroleum Science and Technology 29 (15), 1596-1602, 2011

  • New explicit correlations for turbulent flow friction factor

    D Brkić

    Nuclear Engineering and Design 241 (9), 4055-4059, 2011

  • Review of explicit approximations to the Colebrook relation for flow friction

    D Brkić

    Journal of Petroleum Science and Engineering 77 (1), 34-48, 2011

  • Comments on “Settling velocities of particulate systems 15: Velocities in turbulent Newtonian flows”

    D Brkić

    International Journal of Mineral Processing 92 (3-4), 201-202, 2009

  • Serbian gas sector in the spotlight of oil and gas agreement with Russia

    D Brkić

    Energy Policy 37 (5), 1925-1938, 2009

  • An improvement of Hardy Cross method applied on looped spatial natural gas distribution networks

    D Brkić

    Applied Energy 86 (7-8), 1290-1300, 2009

  • Serbian, Russian pipeline accord enhances European gas security

    D Brkić

    Oil & Gas Journal 106 (48), 52-54, 2008

  • Systematic approach to natural gas usage for domestic heating in urban areas

    D Brkić, TI Tanasković

    Energy 33 (12), 1738-1753, 2008

  • Prirodni gas kao gorivo za grejanje

    D Brkić

    Zadužbina Andrejević, 2006

  • Određivanje graničnih parametara upotrebe prirodnog gasa u Beogradu

    D Brkić

    University of Belgrade, Faculty of Mining and Geological Engineering, 2005

contributions