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相关概念视频

Typical Model Studies01:30

Typical Model Studies

349
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.
349
Design Example: Creating a Hydraulic Model of a Dam Spillway01:21

Design Example: Creating a Hydraulic Model of a Dam Spillway

146
Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.
146
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

154
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.
154
Couette Flow01:22

Couette Flow

233
Couette flow represents the flow of fluid between two parallel plates, with one plate fixed and the other moving with a constant velocity. This configuration allows for a simplified analysis using the Navier-Stokes equations, which govern fluid motion under conditions of viscosity and incompressibility. For Couette flow, the assumptions include a steady, laminar, incompressible flow with a zero-pressure gradient in the flow direction. This flow type is beneficial for understanding shear-driven...
233
Modeling and Similitude01:12

Modeling and Similitude

255
Scaled modeling is a fundamental technique in engineering, enabling the study of large and complex systems by creating smaller, manageable replicas that recreate critical characteristics of the original. In hydrology and civil infrastructure, for example, scaled models of dams help analyze water flow, turbulence, and pressure. This method allows for accurate predictions of real-world behavior within a controlled environment, significantly reducing the cost and time involved in full-scale...
255
Application of the Linear Momentum Equation01:15

Application of the Linear Momentum Equation

72
The application of the linear momentum equation can be used to analyze the forces needed to hold a 180-degree pipe bend in place with flowing water. In this case, water flows through the bend with a constant cross-sectional area of 0.01 square meters and a flow velocity of 15 meters per second. The pressure at the entrance is 0.2 Megapascals and the pressure at the exit is 0.16 Megapascals.
The goal is to determine the force components in the x and y directions to hold the pipe in place. Since...
72

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相关实验视频

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Surrogate Model Development for Digital Experiments in Welding
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一种新的方法可以通过计算机建模自动平衡配置外挤压流量.

Gabriel Wagner1, João Vidal1, Pierre Barbat2

  • 1Institute for Polymers and Composites-IPC, University of Minho, 4800-058 Guimarães, Portugal.

Polymers
|June 13, 2025
PubMed
概括

本研究引入了一种自动计算框架,用于优化挤出模具,显著提高流量均性和减少压力下降. 这种新方法提高了复杂几何形状的工艺效率和产品质量.

关键词:
贝叶斯的优化是贝叶斯的优化.开放式的泡计算流体动力学的流体动力学.挤出模具的优化 模具的优化流量平衡器的流量平衡器轮胎制造业 轮胎制造业 轮胎制造业

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科学领域:

  • 材料科学与工程 材料科学与工程
  • 计算流体动力学的流体动力学.
  • 过程优化 过程优化

背景情况:

  • 挤出模具的设计对于产品质量和制造效率至关重要.
  • 为非同热,非牛顿流量优化复杂的模具几何形状带来了重大挑战.
  • 当前的方法往往需要大量的手动输入和代的设计过程.

研究的目的:

  • 开发一个完全自动化的计算框架,以优化配置挤出模具.
  • 为了在模具出口实现平衡的流量,并最大限度地减少总压力下降.
  • 提高工艺效率,减少复杂模具设计的开发时间.

主要方法:

  • 集成OpenFOAM用于非异热,非牛顿流量建模.
  • 使用FreeCAD进行几何参数化,使用Scikit-Optimize进行贝叶斯优化.
  • 开发了采用Bird-Carreau-Arrhenius模型的定制解决方案,用于温度依赖的粘度和粘度消散.

主要成果:

  • 在轮胎跑道模具案例研究中,在出口速度均性和压力下降的显著改善.
  • 在目标函数中实现了72.7%的增强,将其从0.7333减少到0.2001.1.
  • 该框架有效地导航复杂的设计空间,最小的手动干预.

结论:

  • 拟议的自动化框架为挤压模具优化提供了强大的和可通用的方法.
  • 这种方法显著提高了流程效率,并减少了开发时间.
  • 结果表明,最终产品质量有所提高,特别是在复杂的汽车和轮胎行业的模具中.