Asymptotic scaling of drag in flat-plate turbulent boundary layers
| Autor: | Thara Prabhakaran, Harish Choudhary, Abhishek Gupta, Ambrish Singh, Shivsai Ajit Dixit |
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| Rok vydání: | 2020 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Turbulence Mechanical Engineering Computational Mechanics Boundary (topology) Reynolds number Mechanics Condensed Matter Physics 01 natural sciences Integral equation 010305 fluids & plasmas Physics::Fluid Dynamics Momentum symbols.namesake Boundary layer Mechanics of Materials Drag 0103 physical sciences symbols 010306 general physics Scaling |
| Zdroj: | Physics of Fluids. 32:041702 |
| ISSN: | 1089-7666 1070-6631 |
| DOI: | 10.1063/5.0004464 |
| Popis: | A new asymptotic −1/2 power-law scaling is derived from the momentum integral equation for the drag in flat-plate turbulent boundary layers. In the limit of infinite Reynolds number, the appropriate velocity scale for drag is found to be M/ν, where M is the boundary layer kinematic momentum rate and ν is the fluid kinematic viscosity. Data covering a wide range of Reynolds numbers remarkably collapse to a universal drag curve in the new variables. Two models, discrete and continuous, are proposed for this universal drag curve, and a robust drag estimation method, based on these models, is also presented. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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