2009
DOI: 10.1007/s10409-008-0217-3
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Applications of URANS on predicting unsteady turbulent separated flows

Abstract: Accurate prediction of unsteady separated turbulent flows remains one of the toughest tasks and a practical challenge for turbulence modeling. In this paper, a 2D flow past a circular cylinder at Reynolds number 3,900 is numerically investigated by using the technique of unsteady RANS (URANS). Some typical linear and nonlinear eddy viscosity turbulence models (LEVM and NLEVM) and a quadratic explicit algebraic stress model (EASM) are evaluated. Numerical results have shown that a high-performance cubic NLEVM, … Show more

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Cited by 25 publications
(9 citation statements)
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“…Nevertheless, reading (visual linguistic processing) is faster than listening (auditory linguistic processing) (Breznitz and Berman, 2003), with reading able to reach relatively high speeds (250–350 wpm for most skilled readers) not thought achievable for listening comprehension (Rayner et al, 2009). This difference in speed between reading and listening processing is reflected in ERP studies, with shorter latencies and durations typical of a visual N400 relative to an auditory N400 (Holcomb et al, 1992; Kutas and Federmeier, 2011; Luck, 2005). This may account for the differing latencies we found across modalities.…”
Section: Discussionmentioning
confidence: 99%
“…Nevertheless, reading (visual linguistic processing) is faster than listening (auditory linguistic processing) (Breznitz and Berman, 2003), with reading able to reach relatively high speeds (250–350 wpm for most skilled readers) not thought achievable for listening comprehension (Rayner et al, 2009). This difference in speed between reading and listening processing is reflected in ERP studies, with shorter latencies and durations typical of a visual N400 relative to an auditory N400 (Holcomb et al, 1992; Kutas and Federmeier, 2011; Luck, 2005). This may account for the differing latencies we found across modalities.…”
Section: Discussionmentioning
confidence: 99%
“…1,2,4,5-tetrazine, as one of the promising nitrogen rich [6][7][8][9][10][11][12] EMs, has a nitrogen content of 68.3% in the six-member ring, which makes them present high density and easily obtain oxygen balance, furthermore, the main combustion product is clean gas N 2 [13]. Therefore, they are considered as green energetic materials used in solid propellants, explosives, and civil combustible gas generators [6].…”
Section: Introductionmentioning
confidence: 99%
“…There is a periodic unsteadiness in the flow when the vortex shed off bluff bodies. It is one of the toughest tasks for turbulence modelling to accurately predict the unsteady turbulent flows (Xu &Ma, 2009, Wegner et al, 2004, Durbin, 2002. Durbin (2002) argued that RANS cannot be applied to unsteady flow, unless there is a spectral gap between the unsteadiness and the turbulence.…”
Section: Introductionmentioning
confidence: 99%