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Videos de Conceptos Relacionados

Boundary Layer Characteristics01:18

Boundary Layer Characteristics

When a fluid encounters a solid surface, a boundary layer forms due to the interaction between the fluid's motion and the stationary surface. This phenomenon is characterized by a thin region adjacent to the surface where viscous forces dominate, influencing the fluid's velocity profile. The development of the boundary layer begins at the leading edge of the surface and evolves as the fluid moves downstream.As the fluid flows over the surface, friction between the fluid and the wall slows down...
Typical Model Studies01:30

Typical Model Studies

Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
Turbulent Flow01:24

Turbulent Flow

Turbulent flow is characterized by unpredictable fluctuations in velocity and pressure, which result in a chaotic fluid movement distinct from the orderly patterns of laminar flow. While laminar flow is governed by smooth, parallel layers with minimal mixing, turbulent flow exhibits highly irregular, three-dimensional patterns. This behavior arises due to instabilities in the fluid's velocity profile, and amplifies as the flow velocity increases. Minor disturbances, known as turbulent spots,...
Steady, Laminar Flow in Circular Tubes01:23

Steady, Laminar Flow in Circular Tubes

Hagen-Poiseuille flow describes a viscous fluid's steady, incompressible flow through a cylindrical tube with a constant radius R. This flow profile is often applied to understand fluid transport in narrow channels, such as capillaries. It serves as a foundational example of laminar flow. In this model, cylindrical coordinates (r,θ,z) are used to describe the radial (r), angular (θ), and axial (z) dimensions within the tube. For Hagen-Poiseuille flow, the velocity profile is purely axial,...
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
Laminar and Turbulent Flow01:07

Laminar and Turbulent Flow

Fluid dynamics is the study of fluids in motion. Velocity vectors are often used to illustrate fluid motion in applications like meteorology. For example, wind—the fluid motion of air in the atmosphere—can be represented by vectors indicating the speed and direction of the wind at any given point on a map. Another method for representing fluid motion is a streamline. A streamline represents the path of a small volume of fluid as it flows. When the flow pattern changes with time, the streamlines...

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Updated: Jun 11, 2026

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp
09:58

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Published on: February 3, 2014

Modelo predictivo para el flujo turbulento confinado a paredes.

I Marusic1, R Mathis, N Hutchins

  • 1Department of Mechanical Engineering, University of Melbourne, Victoria 3010, Australia. imarusic@unimelb.edu.au

Science (New York, N.Y.)
|July 10, 2010
PubMed
Resumen
Este resumen es generado por máquina.

Predecir la turbulencia cercana a la pared, crucial para la resistencia aerodinámica y el clima, es un desafío. Un nuevo modelo matemático utiliza datos de la capa límite externa para pronosticar este movimiento complejo de fluidos, ayudando a la ingeniería y la meteorología.

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Published on: February 22, 2018

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Last Updated: Jun 11, 2026

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp
09:58

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Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
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Área de la Ciencia:

  • La dinámica de fluidos es la dinámica de fluidos.
  • La aerodinámica es muy importante.
  • Meteorología Meteorología.

Sus antecedentes:

  • El movimiento del fluido turbulento cerca de los límites sólidos es difícil de predecir.
  • Estas capas cercanas a la pared impactan significativamente la resistencia aerodinámica y los fenómenos atmosféricos.
  • Las mediciones y simulaciones precisas en estas regiones son técnicamente difíciles.

Objetivo del estudio:

  • Desarrollar un modelo matemático para predecir la turbulencia cercana a la pared.
  • Para utilizar la información de la capa límite externa a gran escala para las predicciones.
  • Mejorar las estrategias para el control de turbulencias y mejorar las simulaciones.

Principales métodos:

  • Desarrollo de un nuevo modelo matemático.
  • Utilizando datos a gran escala de la capa límite externa.
  • Concéntrese en predecir el comportamiento en la desafiante región cercana a la pared.

Principales resultados:

  • Se ha establecido una capacidad predictiva para la turbulencia cercana a la pared.
  • El modelo aprovecha la información de la capa límite externa de manera efectiva.
  • Potencial para un mejor control de la turbulencia y simulaciones.

Conclusiones:

  • El modelo propuesto ofrece un nuevo enfoque para comprender y predecir la turbulencia cercana a la pared.
  • Esta capacidad predictiva puede avanzar en la ingeniería y el pronóstico del tiempo.
  • Un mayor desarrollo puede conducir a nuevas estrategias de control de la turbulencia.