Transition in boundary layers subject to free-stream turbulence
Citations
521 citations
Cites background from "Transition in boundary layers subje..."
...Jacobs & Durbin (2001), Brandt et al. (2004) and Zaki & Durbin (2005). Streaks are abundant in the present ZPGFPBL prior to breakdown (see figures 32 and 33)....
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...Jacobs & Durbin (2001), Brandt et al. (2004) and Zaki & Durbin (2005)....
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...Several previous studies on laminar boundary layer under the perturbation of continuous free stream turbulence emphasized on the role of elongated negative u ′ structures (streaks), e.g. Jacobs & Durbin (2001), Brandt et al. (2004) and Zaki & Durbin (2005)....
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298 citations
253 citations
Cites background from "Transition in boundary layers subje..."
...Transition in boundary layers subject to free-stream turbulence (Brandt et al., 2004) 9....
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...Transition in boundary layers subject to free-stream turbulence (Brandt et al., 2004) 9....
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...The front page image is a visualization of laminar-turbulent transition induced by ambient free-stream turbulence convected above a flat plate, i.e. so-called bypass transition (Brandt et al., 2004)....
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238 citations
Cites background or result from "Transition in boundary layers subje..."
...On the other hand, cases LF and LA (figure 4b,c), tend to form incipient turbulent spots (similar to bypass transition caused by free-stream disturbances as e.g. described in Brandt et al. 2004), which then grow while travelling downstream and eventually merge to produce a fully turbulent flow....
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...The overshoot is thus clearly associated with laminar–turbulent transition in accordance with previous transition studies (for instance in the data by Brandt et al. 2004)....
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...…mechanism; cases LA and LF are going through a region with the intermittent appearance of turbulent spots embedded in laminar flow which lead to the characteristic cf curves with a comparatively slow increase towards the turbulent value, as known from bypass transition (Brandt et al. 2004)....
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195 citations
Cites background from "Transition in boundary layers subje..."
...…the same time have the same turbulence scales (both regarding the turbulence decay and the energy-containing scales) is a demanding task, and such studies may therefore be more suitable for direct numerical simulations where such requirements may be controlled easily (see e.g. Brandt et al. 2004)....
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References
8,276 citations
"Transition in boundary layers subje..." refers methods in this paper
...Following the construction of a three-dimensional spectrum in Tennekes & Lumley (1972), an integral length scale L of the turbulence is introduced according to L = 1.8 κmax , where κmax is the wavenumber of maximum energy....
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2,215 citations
"Transition in boundary layers subje..." refers background in this paper
...It is now understood that since the linearized Navier–Stokes operator is non-normal for many flow cases, a significant transient growth may occur before the subsequent exponential behaviour (Butler & Farrell 1992; Reddy & Henningson 1993; Schmid & Henningson 2001)....
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1,083 citations
"Transition in boundary layers subje..." refers background in this paper
...It is now understood that since the linearized Navier–Stokes operator is non-normal for many flow cases, a significant transient growth may occur before the subsequent exponential behaviour (Butler & Farrell 1992; Reddy & Henningson 1993; Schmid & Henningson 2001)....
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993 citations
"Transition in boundary layers subje..." refers background in this paper
...Isotropic grid turbulence can be reproduced by a sum of Fourier modes with random amplitudes (see Rogallo 1981); however, in the presence of an inhomogeneous direction, an alternative complete basis is required; in particular, in the present case, the new basis functions need to accommodate the wall. As pointed out in Grosch & Salwen (1978), a natural choice for the new basis is the use of the modes of the continuous spectrum....
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...Isotropic grid turbulence can be reproduced by a sum of Fourier modes with random amplitudes (see Rogallo 1981); however, in the presence of an inhomogeneous direction, an alternative complete basis is required; in particular, in the present case, the new basis functions need to accommodate the…...
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914 citations
"Transition in boundary layers subje..." refers background in this paper
...…& Huerre (1995) and Bottaro & Klingmann (1996), whereas the instability of streaks arising from the transient growth of streamwise vortices in channel flows has been studied theoretically by Waleffe (1995, 1997) and Reddy et al. (1998) and experimentally by Elofsson, Kawakami & Alfredsson (1999)....
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