The minimal flow unit in near-wall turbulence
WebMar 31, 1991 · In this study, a temporal analysis is employed to elucidate underlying drag-reduction mechanisms among these methods. The analysis is based on the lifetime of … WebApr 26, 2006 · The goal is to isolate the basic flow unit, to study its morphology and dynamics, and to evaluate its contribution to turbulence in fully developed channels. For boxes wider than approximately 100 wall units in the spanwise direction, the flow is …
The minimal flow unit in near-wall turbulence
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WebHigh skin friction in wall-bounded turbulent flows is closely associated with the coherent structures in the near-wall region. The control strategy based on the near-wall physics successfully achieves drag reduction, yet becomes less effective as … WebJun 1, 2024 · MFU has been proven to qualify as a reasonable representation of the small-scale near-wall turbulence that is free of any influence of large scales. 53, 54 On the other hand, the outer...
WebApr 1, 2024 · Recently, Yin et al. (2024, 2024 found turbulent fluctuations in minimal flow units (MFUs) are consistent with the universal signals extracted from the full-sized … WebApr 13, 2024 · To study the internal flow characteristics and energy characteristics of a large bulb perfusion pump. Based on the CFX software of the ANSYS platform, the steady …
WebDec 1, 2024 · Turbulent flows in minimal flow units (MFUs) provide intrinsic information on near-wall physics of turbulence and help to develop useful models for numerical simulations. In the present study, MFUs at friction Reynolds numbers ranging from 1000 to 4000 are simulated. WebThe minimal flow unit in near-wall turbulence. J. Fluid Mech. 225, 213–240. Google Scholar Jiménez, J. and Pinelli, A. (1999). The autonomous cycle of near wall turbulence. J. Fluid Mech. 389, 335–359. MathSciNet Google Scholar Jiménez, J. and Simens, M.P. (2001). Low-dimensional dynamics in a turbulent wall flow. J. Fluid Mech. 435, 81–91.
WebApr 1, 2024 · The method combines the minimum flow units [Yin et al., “Prediction of near-wall turbulence using minimal flow unit,” J. Fluid Mech. 841, 654–673 (2024)] and the predictive...
WebThe minimal flow unit in near-wall turbulence Direct numerical simulations of unsteady channel flow were performed at low to moderate Reynolds numbers on computational … forms and applications etradeWebDec 7, 2011 · The direct numerical simulation of turbulence (DNS) has become a method of outmost importance for the investigation of turbulence physics, and its relevance is constantly growing due to the increasing popularity … forms and checklistWebThe minimal flow unit in near-wall turbulence BY JAVIER JIMENEZI AND PARVIZ MOIN Center for Turbulence Research, Stanford University, Stanford, CA 94305. USA and NASA … different types of taxes in nigeriaWebThe minimal flow unit in near-wall turbulence Jimenez, Javier ; Moin, Parviz Direct numerical simulations of unsteady channel flow were performed at low to moderate … forms and checklist hkexWebApr 1, 1991 · The goal is to isolate the basic flow unit, to study its morphology and dynamics, and to evaluate its contribution to turbulence in fully developed channels. For … forms and checklist cicWebObjective: To find the best mesh based on wall y+ approach and to model turbulence flow numerically over a surface mounted cube so that appropriate mesh can be selected and thereby the best grid configuration can be found. Methods: The study uses three mesh configuration based on wall y plus to capture the turbulence and its complex … different types of taxes in indiaWebA minimum flow through the pump must be maintained to prevent flashing within the casings. The heat transferred from the motor must be removed to keep the fluid below its … forms and certificates