^{1}Vovk, IV^{2}Trotsenko, Ya.P^{1}Institute of Hydromechanics of the NAS of Ukraine, Kyiv^{2}Taras Shevchenko National University of Kyiv |

Dopov. Nac. akad. nauk Ukr. 2019, 7:17-25 |

https://doi.org/10.15407/dopovidi2019.07.017 |

Section: Mechanics |

Language: Ukrainian |

Abstract: The three-dimensional flow of a viscous incompressible fluid in a cylindrical duct with two serial diaphragms (constrictions) is studied by the numerical solution of non–stationary Navier–Stokes equations. The solution algorithm is based on the finite volume method using difference schemes second-order accurate in both space and time. The TVD form of a central-difference scheme with a flow limiter is used for the interpolation of convec tive terms. The combined computation of the velocity and pressure fields is carried out, by using the PISO procedure. |

Keywords: direct numerical simulation, duct with diaphragms, self-sustained oscillations, three-dimensional flow, vortex structures |

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