Natural Aerodynamics

Natural Aerodynamics

International Series of Monographs on Aeronautical Sciences and Space Flight: Aerodynamics, Vol. 1

1st Edition - January 1, 1958

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  • Author: R. S. Scorer
  • eBook ISBN: 9781483226590

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Natural Aerodynamics focuses on the mathematics of any problem in air motion. This book discusses the general form of the law of fluid motion, relationship between pressure and wind, production of vortex filaments, and conduction of vorticity by viscosity. The flow at moderate Reynolds numbers, turbulence in a stably stratified fluid, natural exploitation of atmospheric thermals, and plumes in turbulent crosswinds are also elaborated. This text likewise considers the waves produced by thermals, transformation of thin layer clouds, method of small perturbations, and dangers of extra-polation. This publication is suitable for mathematicians and experimentalists in natural aerodynamical research, but is also valuable to aviators, engineers, geographers, and meteorologists.

Table of Contents

  • Preface

    1 Inertia Forces

    Newton's Laws and the Pressure Gradient

    Pressure Gradient


    Confluence and Convergence

    The Importance of Sound

    Bernoulli's Theorem

    Points of Stagnation

    Efficiency of Catch

    Dynamic Soaring

    Large Air Bubbles in Water

    General Form of the Law of Fluid Motion

    2 Motion on a Rotating Earth

    The Deviating Force

    The Relationship Between Pressure and Wind

    Motion in the Upper Air

    Sutcliffe's Development Theorems


    3 Vorticity

    Distortion and Rotation of a Fluid

    The Vorticity Vector and Vortex Lines

    Motion in a Teacup

    Properties of Vorticity

    The Production of Vortex Filaments

    Production of Vorticity in the Atmosphere by Gravity

    Vortex Rings

    Straight Line Vortices

    Vortex Pair

    Vorticity on a Rotating Earth

    Secondary Flow

    Instability of a Vortex Sheet

    4 Viscosity

    Stresses and Strains

    Kinetic Theory of Viscosity: Transfer of Momentum

    The Reynolds Number


    Efficiency of Catch

    The Boundary Condition in Viscous Flow

    The Conduction of Vorticity by Viscosity

    Flow at Low Reynolds Numbers

    5 Boundary Layers

    Flow at Moderate Reynolds Numbers

    Diffusion of a Vortex Sheet

    The Growth of the Boundary Layer on a Flat Plate

    Diffusion Through Boundary Layers

    The Basis of Boundary Layer Theory

    Separation of the Boundary Layer

    The Growth and Diminution of Boundary Layers

    Cavitation and Salient Edges

    Separation at Bends and Corners

    6 Wakes and Turbulence

    Flow at Large Reynolds Numbers

    The Drag Coefficient

    Some Properties of Wakes

    The Definition of Turbulence; Decay

    The Reynolds Stresses

    Isotropic Turbulence

    The Problem of Defining the Mean Flow

    Turbulence Near Boundaries

    Turbulence in a Stably Stratified Fluid

    Theodorsen's Horseshoes in Boundary Layer Spaghetti

    Forced and Free Convection

    Clear Air Turbulence in the Jet Stream

    7 Buoyant Convection

    Slow Convection

    Convection Streets

    Penetrative Convection

    Thermals in the Atmosphere

    Natural Exploitation of Atmospheric Thermals

    8 Plumes and Jets

    Pure Jets, or Momentum Plumes

    Pure Buoyant Plumes

    Transition from a Jet to a Buoyant Plume

    Jet in a Smooth Crosswind

    Buoyant Plume in a Smooth Crosswind

    Plumes in Turbulent Crosswinds

    Sutton's Theory

    Effective Stack Height

    Diurnal Variations in Plume Behaviour

    The Behaviour of a Plume Near the Orifice

    Plumes as Natural Phenomena

    9 Air Waves

    Explosion Waves

    Tidal Waves; The Theory of Resonance

    Mountain Waves

    Travelling Waves

    Waves Produced by Thermals

    Noise in Nature

    10 Clouds and Fallout

    The Energy of Water

    Convection in a Stable Environment

    The Transformation of Thin Layer Clouds


    Tides in the Atmosphere


    11 Philosophy of Method

    The Mathematician's Method

    Physics: The Method of Dimensional Coefficients

    The Geographers method

    Dimensional Analysis: Numerical Coefficients

    The Method of Small Perturbations

    Formulae for Plume Dispersion: The Dangers of Extra-Polation

    The Sense in a Question

    Problems and Experiments for Discussion


Product details

  • No. of pages: 324
  • Language: English
  • Copyright: © Pergamon 1958
  • Published: January 1, 1958
  • Imprint: Pergamon
  • eBook ISBN: 9781483226590

About the Author

R. S. Scorer

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