Prospects for Practical Application Conditions of Abnormally High Amplitude Self-Oscillating Fluid Flow (Part 1)
I.V. Baranov1, S.I. Burtsev2, S.A. Gastev3
1I.V. Baranov, Prof., PhD, (ITMO University)
2S.I. Burtsev, Prof., PhD (LTD «Bureau of Technics»)
3S.A. Gastev, Postgraduate (ITMO University)
Manuscript received on 03 May 2021 | Revised Manuscript received on 09 May 2021 | Manuscript Accepted on 15 May 2021 | Manuscript published on 30 May 2021 | PP: 17-20 | Volume-1 Issue-1, May 2021 | Retrieval Number: 100.1/ijte.A2305051121
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© The Authors. Published by Lattice Science Publication (LSP). This is an open-access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The outflow of an incompressible fluid from a rectangular opening covered by a semicircular arched element is considered. The self-oscillatory expiration regime is numerically investigated. The computational algorithm implemented in the STAR-CCM+ software package includes a grid approximation in space, an implicit time integration method, and an algebraic multigrid method for solving systems of algebraic equations. A variant of the hole geometry with an aspect ratio of is considered. An explanation is given to the mechanism of the self-oscillatory process. The distribution of oscillation amplitude values in space at the exit from the hole is determined. Some possibilities of practical application of the described phenomenon are determined.
Keywords: Navier-Stokes Equations, Incompressible Fluid, Turbulent Flow, Self-oscillation, Numerical Simulation.