The fundamental equations of two-dimensional layer flows |
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Authors: | Tsai Shu-tang Wu Feng |
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Institution: | 1. Department of Modern Mechanics, University of Science and Technology of China, Hefei Shanghai Institute of Applied Mathematics and Mechanics, Shanghai;
2. Department of Modern Mechanics University of Science and Technology of China, Hefei |
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Abstract: | In many studies on two-dimensional flows in field of atmosphere and ocean the equations which are extension of river-hydraulic equations ∂/∂tUα+Uβ∂Uα/∂Xβ=-g∂h/∂Xα+g(iα-|U|Uα/c2R)+Fα or Navier-Stokes equations ∂/∂tUα+Uβ∂Uα/∂Xβ=-g∂h/∂Xα+giα+Fα+∂/∂Xβ(vt ∂Uα/∂Xβ) are usually used. In these equations -g|U|Uα/c2R or ∂/∂Xβ(vt ∂Uα/∂Xβ) stand for turbulent resistance. Obviously use of these equations in practice may lead to contradiction. In this paper the average of Reynolds equations over depth is taken. The motion equations, continuity equation and diffusion equation are obtained for the average physical variables. |
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Keywords: | viscous interaction invariance wortex field Lagrangian density turbulence |
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