BIOL 205 Study Guide - Final Guide: Laminar Flow, Parasitic Drag, Turbulence
18 May 2016
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Document Summary
P2- drag: forces against forward motion, drag, cross-sectional area perpendicular to direction of flow determines resistance. P3: understand concepts: laminar and turbulent flow, laminar flow smooth flow pattern. Pressure drag minimal b/c csa perpendicular to the direction of flow is minimal. Friction depends on surface properties of plate & viscosity: turbulent flow rough and disorganized flow pattern. Denser the particles, the greater the force impinging on the plate. Resistance against forward motion of the plate is dependent on csa of the plate, density of fluid and velocity of fluid flow. Depends on cross-section, density and velocity: streamlining. Tapering of the trailing surface of a sphere: fitness ratio. Ratio of cord length to maximum thickness. Turbulence results when flow separates from surface of body. P17: explain why larger fish swims faster than smaller fish: size, speed and metabolic cost, fish have same density as water neutrally buoyant, do not support their weight. Only have pressure and friction drag as resistance.
