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Related Concept Videos

Hydrostatic Pressure Force on a Plane Surface01:04

Hydrostatic Pressure Force on a Plane Surface

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When a plane surface is submerged in a fluid, hydrostatic forces develop on the surface due to the fluid's pressure. For horizontal surfaces, the pressure exerted by the fluid is uniform because the depth remains constant. The resultant force is determined by the pressure at the given depth multiplied by the area of the surface, and it acts through the centroid of the surface. For vertical surfaces, the pressure varies with depth, increasing as the distance from the fluid's free surface...
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Pressure Variation in a Fluid at Rest01:11

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In a fluid at rest, the pressure at any point beneath the fluid surface depends solely on the depth, not on the container's shape or size. This principle, known as hydrostatic pressure, arises because, in stationary fluids, there is no acceleration, meaning the forces within the fluid balance out. Only vertical forces, caused by the weight of the fluid above, contribute to pressure changes with depth.
When measuring pressure at two different levels within the fluid, the difference in...
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Boundary Layer Characteristics01:18

Boundary Layer Characteristics

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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...
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Fluid Pressure over Curved Plate of Constant Width01:12

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When a curved plate of constant width is submerged in a liquid, the pressure acting normal to the plate varies continuously both in magnitude and direction. Calculating the magnitude and location of the resultant force at a point is often challenging for such cases. One of the methods to determine the resultant force and its location involves separately calculating the horizontal and vertical components of the resultant force. This complex calculation can be simplified by representing the...
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Hydrostatic Pressure Force on a Curved Surface01:04

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Hydrostatic pressure on curved surfaces is a fundamental concept in fluid mechanics with broad applications in the civil engineering field. When fluid is in contact with a curved surface, as in a reservoir, dam, or storage tank, it exerts pressure that varies in magnitude and direction along the curved surface. To assess the total hydrostatic force exerted by the fluid on a curved structure, engineers typically isolate the fluid volume adjacent to the surface and analyze the forces acting on...
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Related Experiment Video

Updated: Mar 3, 2026

The Measurement of Unsteady Surface Pressure Using a Remote Microphone Probe
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Bridging spatial and temporal surface pressure dynamics for gust aerodynamic modeling.

Dashuai Chen1,2,3, Aoming Liang4,5,6, Boai Sun5,7

  • 1Key Laboratory of 3D Micro/nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, Zhejiang, China.

Communications Engineering
|March 1, 2026
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Summary
This summary is machine-generated.

A new Graph Transformer model accurately predicts unsteady aerodynamic loads from wind gusts, enhancing flight safety for the low-altitude economy. This approach uses a full-link surface pressure graph and temporal attention for precise gust modeling.

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Area of Science:

  • Aerospace Engineering
  • Computational Fluid Dynamics
  • Artificial Intelligence

Background:

  • The low-altitude economy faces challenges from unsteady aerodynamics caused by wind gusts, impacting flight safety.
  • Predicting gust-induced aerodynamic loads is crucial for developing safe urban air mobility and logistics.

Purpose of the Study:

  • To develop a robust framework for predicting gust-induced unsteady aerodynamic loads.
  • To enhance flight safety and enable the advancement of the low-altitude economy.

Main Methods:

  • A Graph Transformer framework was developed, integrating a surface-pressure graph with temporal attention.
  • Sparse pressure tap data was encoded into a full-link graph reflecting airframe topology.
  • Comparative studies evaluated graph link configurations (full-link vs. streamwise/crosswise) and attention mechanisms.

Main Results:

  • A full-link graph is essential for accurate gust modeling, revealing complex crosswise flow patterns.
  • The temporal attention mechanism effectively identifies critical gust event phases.
  • The unified framework achieved robust and accurate predictions across diverse gust scenarios.

Conclusions:

  • The proposed Graph Transformer framework offers a practical solution for precise gust-induced unsteady aerodynamic load prediction.
  • This advancement contributes significantly to improving flight safety in low-altitude operations.
  • The framework supports the safe and efficient development of the low-altitude economy.