Abstract
In a turbulent flow, coherent vortices are generally characterized by a high vorticity modulus and a low pressure. It was shown by Métais and Lesieur [15] that the pressure probability distribution function (pdf) was skewed in isotropic turbulence, with an exponential tail in the lows and a Gaussian one in the highs. On the other hand, the pdf of any vorticity component is symmetric, with exponential-like tails. Analogous results were found in Direct Numerical Simulation (DNS) of a mixing layer [2], and, for the pressure, in experiments of turbulence between two counter-rotating disks [6] and in a jet.
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Métais, O., Lamballais, E., Lesieur, M. (1999). Pressure fluctuations in a turbulent channel. In: Gyr, A., Kinzelbach, W., Tsinober, A. (eds) Fundamental Problematic Issues in Turbulence. Trends in Mathematics. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-8689-5_33
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DOI: https://doi.org/10.1007/978-3-0348-8689-5_33
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