Flow of a Bingham Fluid Through Circular Pipes with Variable Viscosity Coefficient Along the Pipe Length

  • Authors

    • Andrii Zadorozhnyi
    • Artur Kovrevski
    • Yuriy Chovnyuk
    • Nikolay Remarchuk
    2018-09-15
    https://doi.org/10.14419/ijet.v7i4.3.19716
  • elastic limit, flow rate of ready-mixed concrete, pipeline, plastic viscosity coefficient, power shearing stress, tangential stress.

  • Abstract

    Creation of conditions for optimal flow of Bingham media, such as ready-mixed concrete and mortar mixes, in the circular pipeline during delivery by various types of transporting equipment has not been sufficiently studied so far. Purpose: finding patterns of flow of concrete and mortar mixes in different sections of the pipeline, based on the variability of the viscosity coefficient when the medium is flowing through long circular pipes. In calculations of the flow capacity of mortar and concrete pipelines and the required power of the pumping equipment, the properties of concrete and mortar as Bingham media should be taken into account. Dependences for description of the operation process of flow of concrete and mortar mixes through circular pipelines have been found on the basis of the Buckingham equation in the laminar flow mode.

    Dependences of determination of flow rate and required power with continuous delivery of concrete and mortar mixes in the pipeline, as well in case of alternate inlet pressure variation are presented. Law of variation of μр can be obtained only experimentally, which also results in errors in the computation model.

     

     

  • References

    1. [1] Wilkinson W.L. Nen'yutonovskiye zhidkosti [Non-Newton fluids]. Moscow: Mir, (1964) –216 p.

      [2] Gnoyevoy A. V. Osnovy teorii techeniy bingamovskikh sred [Basics of theory of flow of Bingham media]. Moscow: FIZMATLIT, (2004) – 272 p.

      [3] Smolskiy B.M., Shulman Z.P., Gorislavets V.M. Reodinamika i teploobmen nelineyno - vyazkoplastichnykh materialov [Rheodynamics and heat transfer of non-linear viscoplastic materials]. Minsk: Nauka I tekhnika, (1970) – 240 p.

      [4] Prager W. Vvedeniye v mekhaniku sploshnykh sred [Introduction into mechanics of continuous media]. Moscow: Inostrannaya literatura, (1963) – 406 p.

      [5] Romankov P.G., Kurochkina M.I. Gidromekhanicheskiye protsessy khimicheskoy tekhnologii [Hydromechanic processes of chemical technology]. Leningrad department, (1982) – 288 p.

      [6] Lipscomb G.G., Denn M.M. Flow of Bingham fluids in complex geometries. Journal of Non-Newtonian Fluid Mechanics. (1984) — V.14.- pp. 337-346.

      [7] Weipert D. Rheologie der Lebensmittel. H.- D.-Tscheuschner, E.-Windhab.-Hamburg: Behrs, (1993)-620 S.

      [8] Yemelyanova I.A., Zadorozhnyi A.A., Melentsov N.A. Opredeleniye proizvoditel'nosti betononasosov i rastvorobetononasosov v zavisimosti ot reologicheskikh parametrov betonnoy smesi [Determination of the capacity of concrete and mortar-concrete pumps depending on the rheological parameters of the concrete mix]. Naukoviy visnyk budivnytstva. – Kharkiv: KhSTUCS. KhOTV ABU - 2014. Issue 75. – pp. 147-149.

      [9] Zadorozhnyi A.A., Kovrevski A.P. Analiz protsessa dvizheniya bingamovskikh zhidkostey po truboprovodam kruglogo secheniya [Analysis of the flow of Bingham fluids though circular pipelines]. Collection of research papers of UkrDUZT, 2017, Issue 168 – pp. 44-49.

      [10] Zadorozhnyi A.A., Kovrevski A.P., Chovnyuk Y.V.,Remarchuk N.P. Osoblyvosti techiyi ridyn zminnoyi v’yazkosti po truboprovodu riznoyi formy poperechnoho peretynu [Features of the flow of liquids of variable viscosity by the pipeline of a various form of tranverse section]. Collection of scientific works of the international scientific conference. „Technology and transport infrastructure“-Kharkiv: UkrDUZT, 2018, – pp. 24-25.

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  • How to Cite

    Zadorozhnyi, A., Kovrevski, A., Chovnyuk, Y., & Remarchuk, N. (2018). Flow of a Bingham Fluid Through Circular Pipes with Variable Viscosity Coefficient Along the Pipe Length. International Journal of Engineering & Technology, 7(4.3), 100-104. https://doi.org/10.14419/ijet.v7i4.3.19716

    Received date: 2018-09-16

    Accepted date: 2018-09-16

    Published date: 2018-09-15