In turbulent flow, the speed of the fluid at a point is continuously undergoing changes in both magnitude and direction.ĭetailed knowledge of the behavior of turbulent flow regimes is important in engineering because most industrial flows, especially those in nuclear engineering, are turbulent. Turbulence is also characterized by recirculation, eddies, and apparent randomness. In contrast to laminar flow, the fluid does not flow in parallel layers, the lateral mixing is very high, and there is a disruption between the layers. In fluid dynamics, turbulent flow is characterized by the irregular movement of fluid particles (one can say chaotic) of the fluid. The main tool available for the analysis of turbulent flows is CFD analysis.
Usually, a higher velocity flow is required, but this also depends on the size of an object. In which V is the mean flow velocity, D is a characteristic linear dimension, ρ fluid density, μ dynamic viscosity, and ν kinematic viscosity. It is defined as the ratio of inertial forces to viscous forces. The Reynolds number is one of the characteristic numbers used for predicting whether a flow condition will be laminar or turbulent.When the inertial forces dominate over the viscous forces (when the fluid flows faster and Re is larger), the flow is turbulent.When the viscous forces are dominant (slow flow, low Re), they are sufficient to keep all the fluid particles in line, then the flow is laminar.Detailed knowledge of the behavior of turbulent flow regimes is important in engineering because most industrial flows are turbulent. Turbulent flow tends to occur at higher velocities, low viscosity. Turbulent flow is characterized by the irregular movement of fluid particles (one can say chaotic).
Article Summary & FAQs What is turbulent flow?
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