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The Transitional Backward-Facing Step Flow in a Water Channel with Variable Expansion Geometry
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SYSNO ASEP 0376600 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The Transitional Backward-Facing Step Flow in a Water Channel with Variable Expansion Geometry Author(s) Tihon, Jaroslav (UCHP-M) RID, ORCID, SAI
Pěnkavová, Věra (UCHP-M) RID, ORCID, SAI
Havlica, Jaromír (UCHP-M) RID, ORCID, SAI
Šimčík, Miroslav (UCHP-M) RID, SAI, ORCIDSource Title Experimental Thermal and Fluid Science. - : Elsevier - ISSN 0894-1777
Roč. 40, JUL (2012), s. 112-125Number of pages 14 s. Language eng - English Country US - United States Keywords backward-facing step flow ; wall shear stress ; flow forcing Subject RIV CI - Industrial Chemistry, Chemical Engineering R&D Projects GA104/07/1110 GA ČR - Czech Science Foundation (CSF) GAP101/11/0806 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40720504 - UCHP-M (2005-2011) UT WOS 000304513700013 DOI 10.1016/j.expthermflusci.2012.02.006 Annotation The backward-facing step flow is investigated experimentally and numerically at moderate Reynolds numbers. The different channel expansion ratios (ER = 1.4, 2, 2.5, and 4) and inlet flow conditions (steady and pulsatile) are applied with the aim to analyze the structure and stability of the flow behind the step. The electrodiffusion technique is used to measure the wall shear rate along the experimental water channel. The direction sensitive sensors detect the near-wall extent of different flow-recirculation regions (the primary recirculation, the secondary corner, roof, and bottom eddies). The results of 2D numerical simulations performed in commercial CFD software FLUENT provide additional information on the global flow rearrangement caused by the change of operation parameters. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2013
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