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ORIGINAL PAPER
Analysis of factors affecting destabilization of a viscous liquid flow in channels
1
Department of Applied Hydroaeromechanics and Mechanotronics,
National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv
2
Institute of Civil Engineering and Building Systems, Lviv Polytechnic National University, Lviv
3
Department of Applied Hydroaeromechanics and Mechanotronics, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv
Online publication date: 2023-09-29
Publication date: 2023-09-29
International Journal of Applied Mechanics and Engineering 2023;28(3):86-100
KEYWORDS
hydrodynamic initial sectionponderomotive forceslength of the initial sectionHartmann numberunstabilized fluid flow
ABSTRACT
An analysis of the influence of inertia forces and ponderomotive forces on the destabilization of the flow of viscous fluids in the hydrodynamic initial section is given. Cases of flow of viscous, anomalously viscous and electrically conductive liquids are considered; the degree of influence of mass forces on the destabilization of the flow is estimated. As applied to the flow in the hydrodynamic initial section, the degree of influence of inertia forces from convective acceleration and forces with a magnetic nature can be different. Inertia forces stimulate the accelerated movement of the fluid, and in the case of forces with a magnetic nature, ponderomotive forces contribute to deceleration, which is confirmed by the results of studies of the velocity field. Recommendations are given for calculating the length of the hydrodynamic initial section in the presence of mass forces with different nature.
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