関連する実験動画
Updated: Feb 20, 2026
09:41
Blast Quantification Using Hopkinson Pressure Bars
Published on: July 5, 2016
9.5K
機械学習ポテンシャルのための平面-局所圧力の定義の量子法
1Brunel University of London Kingston Lane Uxbridge Middlesex, Uxbridge UB8 3PH, United Kingdom.
The Journal of chemical physics
|February 18, 2026
まとめ
平面の方法 (MoP) は,不均質な流体におけるストレスを正確に計算します. 機械学習の可能性のための MoP のこの拡張は,非均衡の分子動力学シミュレーションに不可欠です.
科学分野:
- 計算物理と化学を研究する.
- マテリアルサイエンス 材料科学
- 統計力学 統計力学とは
背景:
- ストレスは,エンジニアリングと分子モデリングにおいて不可欠です.
- ウイルス性ストレステンソーは,不均質な流体に対して不正確であり,流体力学および非均衡分子力学 (NEMD) シミュレーションにおいて不可欠である.
研究 の 目的:
- 平面 (MoP) のストレスの計算方法を,機械学習 (ML) の潜在力であるMACE潜在力に拡張する.
- 水-ジルコニウム酸化物のインターフェースなどのシナリオおよび非均衡条件でのMACEポテンシャルのためのMoPを検証する.
主な方法:
- イーヴィングとカークウッドの理論的枠組みを使用して,MACEポテンシャルのための局所ストレスを導出しました.
- 水-ジルコニウム酸化物のインターフェースシミュレーションに平面の方法 (MoP) を適用しました.
- 非均衡シミュレーションでMoPで囲まれた制御体積で示されたストレス保存.
主要な成果:
- MoPは,ウイルス性ストレステンソルが失敗する水-ジルコニウム酸化物界面での力平衡を正確に測定します.
- 平面張力定義は均衡状態から遠いところでも有効であり,各時間ステップで正確な保全を示している.
- この研究は,ストレスを直接保存方程式と関連付け,NEMDシステムでの有効性を証明しています.
結論:
- 拡張されたMoPは,MLポテンシャルを使用して不均質な流体におけるストレスを計算するための有効で正確な方法を提供します.
- この研究は,NEMDと分子流体力学におけるMLの適用の基礎となる.
- 結果を再現し,MOPをMACEシステムに適用するためにオープンソースのコードが提供されています.
関連する概念動画
01:15Concept of Pressure at a Point
807
The concept of pressure at a point in a fluid establishes that pressure within a fluid is uniform in all directions at a specific location. This uniformity occurs because fluid molecules exert force evenly across any point due to their random motion and continuous collisions within the fluid. Pressure at a point is determined by the surrounding fluid molecules and is influenced by factors like depth and density, rather than by shape or orientation.
In a fluid at rest, pressure acts equally in...
In a fluid at rest, pressure acts equally in...
807
01:29Application of Linearization and Approximation
111
A drone flying through complex terrain often relies on more than one sensing method to estimate small changes in altitude. Along with direct measurements, air pressure provides a useful indirect indicator of vertical movement. Atmospheric pressure decreases as altitude increases, and this relationship is commonly described using an exponential model. Although accurate, converting pressure measurements into altitude values requires calculations that are too complex to perform repeatedly during...
111
01:13Basic Equation for Pressure Field
626
The basic equation for a pressure field in fluid mechanics captures the balance of forces within any segment of fluid, providing a foundational understanding of how pressure changes within fluids under various forces. Generally, two main types of forces act on any part of a fluid: surface forces and body forces. Surface forces arise from pressure differences across points within the fluid, which result in net forces that can vary depending on the local pressure gradient. Body forces, on the...
626
01:14Fluid Pressure
1.3K
In mechanical engineering, fluid pressure plays a critical role in designing systems that utilize liquid flow, such as hydraulic systems, pumps, and valves. When designing these systems, engineers must ensure they can withstand the forces created by fluid pressure to avoid damage or failure.
According to Pascal's law, a fluid at rest will generate equal pressure in all directions. This pressure is measured as a force per unit area, and its magnitude depends on the fluid's specific...
According to Pascal's law, a fluid at rest will generate equal pressure in all directions. This pressure is measured as a force per unit area, and its magnitude depends on the fluid's specific...
1.3K
01:04Hydrostatic Pressure Force on a Plane Surface
1.5K
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...
1.5K
01:23Plane Potential Flows
1.0K
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...
1.0K