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Prikladnaya Mekhanika i Tekhnicheskaya Fizika, 2006, Volume 47, Issue 1, Pages 18–28
(Mi pmtf2106)
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This article is cited in 9 scientific papers (total in 9 papers)
Friction and heat transfer in a laminar separated flow behind a rectangular step with porous injection or suction
V. I. Terekhov, S. R. Batenko Kutateladze Institute of Thermophysics, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090, Russia
Abstract:
Results of a numerical study of a laminar separated flow behind a rectangular step on a porous surface with uniform injection or suction are described. Two cases are considered: an unconfined flow past a step and flow evolution in a confined channel (duct). It is shown that mass transfer on the surface causes strong changes in the flow structure and substantially affects the position of the reattachment point, as well as friction and heat transfer. More intense injection leads first to an increase in the separation-zone length and then to its rapid vanishing due to boundary-layer displacement. Vice versa, suction at high Reynolds numbers $\mathrm{Re}_s>$ 100 reduces the separation-zone length. The duct flow has a complicated distribution of friction and heat-transfer coefficients along the porous surface owing to the coupled effect of the transverse flow of the substance and changes in the main flow velocity due to mass transfer.
Keywords:
flow separation and reattachment, laminar flow, porous injection and suction, backward-facing step, friction, heat transfer.
Received: 04.08.2004 Accepted: 31.01.2005
Citation:
V. I. Terekhov, S. R. Batenko, “Friction and heat transfer in a laminar separated flow behind a rectangular step with porous injection or suction”, Prikl. Mekh. Tekh. Fiz., 47:1 (2006), 18–28; J. Appl. Mech. Tech. Phys., 47:1 (2006), 12–21
Linking options:
https://www.mathnet.ru/eng/pmtf2106 https://www.mathnet.ru/eng/pmtf/v47/i1/p18
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