Laminar-Turbulent Transition in View of Flow Separation from Isothermal and Heated Cylinder

0536300 - ÚT 2021 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Pech, Jan
Laminar-Turbulent Transition in View of Flow Separation from Isothermal and Heated Cylinder.
Topical Problems of Fluid Mechanics 2020. Praha: Ústav termomechaniky AV ČR, v. v. i., 2020 - (Šimurda, D.; Bodnár, T.), s. 168-175. ISBN 978-80-87012-74-1. ISSN 2336-5781.
[Topical Problems of Fluid Mechanics 2020. Prague (CZ), 19.02.2020-21.02.2020]
Grant ostatní: AV ČR(CZ) MSM100761901
Program: Program na podporu mezinárodní spolupráce začínajících výzkumných pracovníků
Institucionální podpora: RVO:61388998
Klíčová slova: transition to turbulence * heated flow * cylinder flow * separation angle * Navier-Stokes- Fourier * spectral/hp element method
Obor OECD: Mechanical engineering
http://www2.it.cas.cz/fm2015/im/admin/showfile/data/my/Papers/2020/22-TPFM2020.pdf

This work presents insight to the laminar-turbulent transition in flow around cylinder through a numerical simulation, both in isothermal and heated case. The flow is modelled directly as a solution to the Navier-Stokes and Navier-Stokes-Fourier system. Reynolds numbers are considered in range 100-20000, ratio of cylinder-wall and upstream temperature is up to 1.5. Curves representing evolution of separation positions in time provide novel insight to vortex formation. Various regimes are recognized and some of them can be assigned to phenomena described formerly in experiment.
Trvalý link: http://hdl.handle.net/11104/0314694