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This chapter introduces the fundamental concepts related to the state of turbulent motion in a fluid. The peculiar characteristics of turbulence are described and the dimensionless Reynolds number, which governs the transition from a state of laminar motion to a turbulent one, is analysed. The concept of turbulent (eddy) viscosity, of fundamental importance in meteorological and oceanographic applications, is also introduced.

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Turbulence and Turbulent Viscosity

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  • 发表日期：

    2025年

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  • Stefano Pierini

摘要

This chapter introduces the fundamental concepts related to the state of turbulent motion in a fluid. The peculiar characteristics of turbulence are described and the dimensionless Reynolds number, which governs the transition from a state of laminar motion to a turbulent one, is analysed. The concept of turbulent (eddy) viscosity, of fundamental importance in meteorological and oceanographic applications, is also introduced.