Laminar and Turbulent Flow

Factors that affect the movement of a fluid Fluid Dynamics Factors that affect the movement of a fluid Determines whether the flow is smooth or rough

Viscosity is fluid friction Viscosity depends on temperature Higher temperature leads to lower viscosity (or lower resistance)

In a pipe,

In a pipe, Maximum flow in centre of pipe Minimum velocity - Friction between fluid and walls reduces speed to nearly zero

Laminar Flow Layers flow smoothly over each other Two Types of Flow: Laminar Flow Layers flow smoothly over each other Generally travel in smooth, straight lines

Turbulent Flow Two Types of Flow: Irregular flow Fluid is moving too quickly Results in a whirling effect called an eddy and the fluid loses kinetic energy

Laminar Turbulent Transition Depends on fluid speed, viscosity, density and size of object it encounters Http://www.youtube.com/ watch?v=XOLl2KeDiOg

In a pipe,

Wind tunnels are used to analyse flow around objects Analyzing Flow Wind tunnels are used to analyse flow around objects Laminar flow is preferred to reduce drag

Work Read Pg 279-280 & Answer Q # 3 Pg 281 # 1-3, 5, 7a