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    Wyświetlanie 1-4 z 4
    Tytuł:
    Dynamic Processes Modeling in a Peristaltic Pump with a Hydraulic Drive for the Bingham Fluid
    Autorzy:
    Shatokhin, Vladimir M.
    Ivanchuk, Yaroslav V.
    Dvirna, Olha
    Veselovskaya, Natalia
    Jurczak, Wojciech
    Powiązania:
    https://bibliotekanauki.pl/articles/2201848.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    peristaltic pump
    dynamic process simulation
    Bingham fluid
    hydraulic drive
    pump rotor
    Opis:
    At present peristaltic pumps are widely used in many branches of industry and national economy. Simplicity of construction, processability and possibility of pumping liquids with big quantity of solid particles are the main advantages while using peristaltic pumps. Therefore development of methods of rational choice of parameters at designing of peristaltic pumps is the actual problem. To develop universal mathematical models of dynamic processes in peristaltic pumps for definition of rational technical parameters. In dynamic processes we propose to use differential equations of motion in the Lagrange form, where the angle of rotation of the pump rotor is taken as a universal coordinate. Mathematical model of dynamic processes in peristaltic pump with hydraulic drive has been created on the base of differential equation. The function of resistance forces caused by gravity forces of mixture particles in the hose reel has been determined. On the basis of the non-linear model of the resistance forces to the flow of the fluid Bingham method of constructing the dependence of the pressure drop on the angular velocity of the rotor to determine the resistance forces to the flow of the fluid has been proposed. The result of dynamic processes simulation is the determination of interrelationship of technological parameters of the device functioning: the velocity of the medium and pump performance is increasing at reducing the length of the diverting hose and reducing the height of its rise; a significant influence on the average speed has plastic viscosity of the environment; a significant change in the yield strength has an insignificant impact on the speed.
    Źródło:
    Advances in Science and Technology. Research Journal; 2022, 16, 4; 256--269
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variational Analysis of a Frictional Contact Problem for the Bingham Fluid
    Autorzy:
    Awbi, B.
    Selmani, L.
    Sofonea, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/908296.pdf
    Data publikacji:
    1999
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    płyn binghamowski
    prawo Coulomba
    nierówność wariacyjna
    rozwiązanie słabe
    Bingham fluid
    damped response
    Coulomb's friction law
    quasi-variational inequality
    weak solution
    Opis:
    We consider a mathematical model which describes the flow of a Bingham fluid with friction. We assume a stationary flow and we model the contact with damped response and a local version of Coulomb's law of friction.The problem leads to a quasi-variational inequality for the velocity field. We establish the existence of a weak solution and, under additional assumptions, its uniqueness. The proofs are based on a new result obtained in (Motreanu and Sofonea, 1999). We also establish the continuous dependence of the solution with respect to the contact conditions.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 1999, 9, 2; 371-385
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    CFD model of a magnetorheological fluid in squeeze mode
    Autorzy:
    Sapiński, B.
    Szczęch, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/386683.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    MR fluid
    squeeze mode
    CFD modeling
    Bingham model
    ciecz MR
    ciecz magnetoreologiczna
    model CFD
    model Binghama
    Opis:
    The study briefly outlines a CFD model of a magnetorheological (MR) fluid operated in squeeze mode with a constant interface area using the CFD (Computational Fluid Dynamics) approach. The underlying assumption is that the MR fluid is placed between two surfaces of which at least one can be subject to a prescribed displacement or a force input. The widely employed Bingham model, which fails to take into account the yield stress variations depending on the height of the gap, has been modified. Computation data obtained in the ANSYS CFX environment are compared with experimental results.
    Źródło:
    Acta Mechanica et Automatica; 2013, 7, 3; 180-183
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porous squeeze film bearing with rough surfaces lubricated by a Bingham fluid
    Autorzy:
    Walicka, A.
    Walicki, E.
    Jurczak, P.
    Falicki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/955251.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    płyn lepkosprężysty
    model Binghama
    łożysko oporowe
    warstwa porowata
    viscoplastic fluid
    Bingham model
    thrust bearing
    porous layer
    Christensen roughness
    Opis:
    In the paper the effect of both bearing surfaces and the porosity of one bearing surface on the pressure distribution and load-carrying capacity of a squeeze film bearing is discussed. The equations of motion of a Bingham fluid in a bearing clearance and in a porous layer are presented. Using the Morgan-Cameron approximation and Christensen theory of rough lubrication the modified Reynolds equation is obtained. The analytical solutions of this equation for a squeeze film bearing are presented. As a result one obtains the formulae expressing pressure distribution and load-carrying capacity. A thrust radial bearing is considered as a numerical example.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2014, 19, 4; 795-808
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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