Název:
Laminar-Turbulent Transition in View of Flow Separation from Isothermal and Heated Cylinder
Autoři:
Pech, Jan Typ dokumentu: Příspěvky z konference Konference/Akce: Topical Problems of Fluid Mechanics 2020, Prague (CZ), 20200219
Rok:
2020
Jazyk:
eng
Abstrakt: 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.
Klíčová slova:
cylinder flow; heated flow; Navier-Stokes- Fourier; separation angle; spectral/hp element method; transition to turbulence Číslo projektu: MSM100761901 (CEP) Poskytovatel projektu: AV ČR Zdrojový dokument: Topical Problems of Fluid Mechanics 2020, ISBN 978-80-87012-74-1, ISSN 2336-5781