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2 cards from this section. Quick, good the night before a test.
What is the main characteristic of turbulent flow?
Think about how the flow motion appears visually.
Define Reynolds number.
It indicates transitions between laminar and turbulent flow.
What is the critical Reynolds number for the transition to turbulent flow?
Remember the common limits for flow regimes.
Is turbulent flow characterized by uniform velocity?
Think about how the velocity behaves in turbulence.
Given a steady flow of a fluid through a pipe with a diameter of 0.25 m at a speed of 3 m/s, calculate the Reynolds number using the kinematic viscosity of 1 × 10^-6 m²/s. Determine if the flow is laminar or turbulent.
Substitute the velocity, diameter, and kinematic viscosity in the formula.
If the shear stress at the wall of a turbulent pipe is calculated to be 0.5 N/m², determine the average velocity if the diameter of the pipe is 0.1 m. Use the formula: τ = (2 * τw * r) / D.
Think about density and how it relates to shear stress and velocity.
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