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Drag Force and Terminal Speed01:18

Drag Force and Terminal Speed

An interesting force in everyday life is the force of drag on an object when it is moving in a fluid. Like friction, the drag force always opposes the motion of an object. Unlike simple friction, the drag force is proportional to some function of the velocity of the object in that fluid. This functionality is complicated and depends upon the shape of the object, its size, its velocity, and the fluid it is in. For most large objects, such as cyclists, cars, and baseballs, that are not moving too...
Determination of Pi Terms01:15

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General External Flow Characteristics

The study of external flow is essential for creating structures and objects that interact efficiently and safely with moving fluids, such as air or water. When a body is immersed in a flowing fluid, it experiences two primary forces: drag, which opposes motion along the flow direction, and lift, which acts perpendicular to the flow. The shape, size, and orientation of the object influence these forces.Streamlined and Blunt Bodies in External FlowObjects in fluid flow are classified as...
Drag01:23

Drag

Drag is a resistive force opposing an object’s motion through a fluid, resulting from surface pressure and shear forces. It comprises two components: a perpendicular one from pressure and a tangential one from shear stress. Accurate drag calculations use pressure and wall shear stress distributions, often determined through Computational Fluid Dynamics (CFD) or wind tunnel testing. The drag coefficient, a dimensionless measure, depends on factors like shape, Reynolds number, Mach number, Froude...
Lift01:23

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Lift is a fundamental aerodynamic force that acts perpendicular to the direction of airflow. It plays a central role in achieving and sustaining flight and in stabilizing various vehicles. Lift primarily originates from pressure differences created across surfaces, such as an airfoil. A lower pressure region forms above the wing, while a higher pressure region forms below it, generating an upward force. This differential results from the shape and orientation of the airfoil, enabling the wing...
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Structural Design and Manufacturing of a Cruiser Class Solar Vehicle
14:57

Structural Design and Manufacturing of a Cruiser Class Solar Vehicle

Published on: January 30, 2019

Aerodinámica computacional para el diseño de aeronaves.

A Jameson

    Science (New York, N.Y.)
    |July 28, 1989
    PubMed
    Resumen
    Este resumen es generado por máquina.

    Este artículo analiza los métodos numéricos para predecir los flujos de las aeronaves, centrándose en modelos matemáticos, algoritmos de captura de golpes y geometrías complejas. Estos métodos son cruciales para optimizar el rendimiento aerodinámico en el diseño de aeronaves.

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    Área de la Ciencia:

    • Dinámica de fluidos computacional (CFD, por sus siglas en inglés)
    • Ingeniería Aeroespacial Ingeniería Aeroespacial.

    Sus antecedentes:

    • Los métodos numéricos son esenciales para simular la compleja dinámica de fluidos.
    • Predecir el flujo de aire sobre las aeronaves es fundamental para el diseño y el rendimiento aerodinámico.

    Objetivo del estudio:

    • Para esbozar los principales desafíos en el desarrollo de métodos numéricos para la predicción de flujo de aeronaves.
    • Discutir la aplicación de estos métodos en el proceso de diseño de aeronaves.

    Principales métodos:

    • Selección de modelos matemáticos apropiados para el flujo de fluidos.
    • Desarrollo e implementación de algoritmos de captura de golpes.
    • Manejo de configuraciones geométricas complejas en simulaciones.
    • Utilizando métodos computacionales para la optimización de la forma aerodinámica.

    Principales resultados:

    • Se identificaron los principales problemas en la predicción de flujo numérico para aeronaves.
    • Destacó la importancia de los algoritmos de captura de golpes y el tratamiento de la complejidad geométrica.
    • Demostró el papel de los métodos numéricos en la optimización del rendimiento aerodinámico.

    Conclusiones:

    • Los métodos numéricos eficaces son vitales para avanzar en el diseño de aeronaves.
    • Abordar los desafíos en el modelado matemático y el diseño de algoritmos es clave.
    • La Dinámica de Fluidos Computacional (CFD) juega un papel importante en la optimización del rendimiento aerodinámico.