相关实验视频
Updated: Jun 9, 2025

04:58
A Rapid Method for Modeling a Variable Cycle Engine
Published on: August 13, 2019
7.5K
对于快速飞机空气动力学模拟的神经场.
Giovanni Catalani1,2,3, Siddhant Agarwal4, Xavier Bertrand5
1Airbus, Aircraft Aerodynamics, Toulouse, France. giovanni.catalani@airbus.com.
Scientific reports
|October 27, 2024
概括
隐式神经表示 (INRs) 为流体动力学模拟创建准确,高效的替代模型. 这种方法可以将其推广到新的形状,并大大加快了高保真度的解决方法.
科学领域:
- 计算流体动力学的流体动力学.
- 机器学习 机器学习
- 科学计算科学计算
背景情况:
- 传统的流体动力学模拟在计算上昂贵.
- 开发准确和可概括的替代模型对于加速设计和分析至关重要.
研究的目的:
- 引入隐式神经表示 (INRs) 来学习稳态流体动力学的替代模型.
- 为了证明模型能够处理非结构化领域,几何变化,并概括到未见的形状的能力.
- 评估计算成本和准确性之间的权衡.
主要方法:
- 使用基于坐标的配方用于基于INR的代孕模型.
- 将该方法应用于2D压缩流在气翼上的数据集和3D翅膀表面压力分布.
- 将性能与最先进的图形神经网络架构进行比较.
主要成果:
- 与图形神经网络相比,实现了三倍以上的测试误差和在未见几何上改进的概括.
- 证明了对离散的稳定性,以及计算成本和准确性之间的出色平衡.
- 在RANS跨声波翼数据集上实现了高准确度数值解析器的五级加速.
结论:
- 基于INR的替代模型为流体动力学模拟提供了强大而高效的方法.
- 拟议的方法显著提高了概括能力和计算速度.
- 这种方法对加速工程设计和流体动力学分析具有前景.
相关概念视频
Plane Potential Flows
369
Plane potential flows simplify fluid motion by assuming the fluid to be irrotational and incompressible. These characteristics allow these flows to be described by a velocity potential function, ϕ, representing the flow speed in a given direction, and a stream function, ψ, that visualizes the flow path, both governed by Laplace's equation. These parameters help in estimating flow patterns, velocity distributions, and pressure fields around various hydraulic structures.
Uniform...
Uniform...
369
Accelerating Fluids
1.0K
When a fluid is in constant acceleration, the pressure and buoyant force equations are modified. Suppose a beaker is placed in an elevator accelerating upward with a constant acceleration, a. In the beaker, assume there is a thin cylinder of height h with an infinitesimal cross-sectional area, ΔS.
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
1.0K
Turbulent Flow
146
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...
146
Laminar and Turbulent Flow
8.4K
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...
8.4K
Turbulent Flow: Problem Solving
96
Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
96
Navier–Stokes Equations
430
For incompressible Newtonian fluids, where density remains constant, stresses show a linear relationship with the deformation rate, defined by normal and shear stresses. Normal stresses depend on the pressure exerted on the fluid and the rate of deformation in specific directions, which determines how fluid flows under varying pressures. Shear stresses, on the other hand, act tangentially across fluid layers. They explain how adjacent fluid layers slide relative to one another, connecting...
430

