Numerical Simulation of Two-dimensional Unsteady Separated Flow and Heat Transfer around an Inclined Downward Step

Autor:	Kazuaki Sugawara, Hiroyuki Yoshikawa, Terukazu Ota, Eiji Kaihara
Rok vydání:	2004
Předmět:	Materials science Computer simulation Plane (geometry) Mechanical Engineering Flow (psychology) Finite difference method Direct numerical simulation Reynolds number Mechanics Condensed Matter Physics Nusselt number Physics::Fluid Dynamics symbols.namesake Classical mechanics Heat transfer symbols
Zdroj:	TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B. 70:1812-1819
ISSN:	1884-8346 0387-5016
DOI:	10.1299/kikaib.70.1812
Popis:	Direct numerical simulation methodology is employed to analyze the unsteady characteristics of a two-dimensional separated and reattached flow and heat transfer around an inclined downward step in a plane channel. Numerical calculations of the Navier-Stokes, energy and continuity equations are carried out using the finite difference method. The Reynolds number Re based on the mean velocity at inlet and the step height ranges from 300 to 2 000, and the inclination angle of step α is systematically varied from 15° to 90°. The expansion ratio of channel is 2.0. For all the inclination angles examined, the flow is steady at Re≤500 but becomes unsteady at Re=700. In a range of α from 30° to 75°, effects of α upon the reattachment length and the maximum Nusselt number are relatively small in a wide range of the Reynolds number.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a28ec67c49a4852f6e8fb26be8d4180d https://doi.org/10.1299/kikaib.70.1812 Zobrazit plný text záznamu