The Reynolds number is a critical dimensionless quantity that quantifies the ratio of inertial forces to viscous forces in fluid flow. When viscous forces dominate, typically indicated by a low Reynolds number (Re < 2000), the flow is laminar, characterized by smooth and orderly fluid motion. Conversely, as the Reynolds number increases, indicating a dominance of inertial forces, the flow transitions to turbulent, marked by chaotic and irregular fluid motion. High viscosity contributes to flow stability but can also induce instabilities, such as Tollmien-Schlichting waves, that lead to flow transition.
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Kidphysics said:So I understand that Reynolds number is the ratio of intertial forces to viscous forces but how exactly does this relate to flow? Why is it that when viscous forces dominate one gets a laminar flow? How to conceptualize?
Chestermiller said:High viscosity tends to damp out turbulent energy fluctuations.