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関連する概念動画

Accelerating Fluids01:17

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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.
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Free Jet01:14

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Free jets describe the flow of liquid exiting a reservoir through an opening into the atmosphere without resistance. The velocity (v) of the liquid jet is derived using Bernoulli's principle and expressed as:
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Atomic Absorption Spectroscopy: Atomization Methods01:25

Atomic Absorption Spectroscopy: Atomization Methods

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Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the...
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Bernoulli's Equation for Flow Along a Streamline01:30

Bernoulli's Equation for Flow Along a Streamline

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Bernoulli's equation relates the energy conservation in a fluid moving along a streamline. The equation applies to incompressible and inviscid fluids under steady flow. For such a flow, Newton's second law is applied to a small fluid element, which experiences forces due to pressure differences, gravity, and velocity variations. The force balance leads to the following form of Bernoulli's equation:
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Newtonian fluids exhibit a constant viscosity, meaning their shear stress and shear strain rate are directly proportional. This property ensures a predictable and stable response to applied forces, maintaining a linear relationship between force and flow. Examples include water, air, and light oils, consistently demonstrating this proportional behavior regardless of external conditions.
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Precipitate Formation and Particle Size Control01:16

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In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
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Updated: Sep 10, 2025

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コーン・ジェット・レジームにおける電水ダイナミック・アトマイゼーションのシミュレーションのための改良されたインターポレーション・メソッド

Kofi Owusu-Sekyere1, Yongzhong Chen1, Jiameng Tian1

  • 1School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.

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まとめ

新しいハイブリッド平均平均 (HAM) インターポレーション方法は,電水動力学 (EHD) 原子化のための数値シミュレーションを改善します. HAMは,従来の方法と比較して,電荷分布とドロップレット形成の予測の精度を高めます.

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科学分野:

  • 計算式流体力学 (CFD)
  • 電気水力学 (EHD)
  • マルチフェーズフローモデリング

背景:

  • コーネスジェット方式の電気スプレー技術は,原子化プロセスに不可欠です.
  • EHDシミュレーションでは,加重算数平均 (WAM) と加重調和平均 (WHM) のような従来のインターポレーション方法は,安定性と計算効率の限界を示している.
  • 正確な数値シミュレーションは,EHDの原子化を理解し,最適化するために不可欠です.

研究 の 目的:

  • EHD原子化における数値シミュレーションの強化のための新しいハイブリッド平均平均 (HAM) インターポレーション方法の導入と評価.
  • インターフェースのダイナミクスと充電特性を把握する上で,HAMの性能を伝統的なWAMとWHMの方法と比較する.
  • EHDシステムの計算流体力学 (CFD) モデルの正確性と信頼性を向上させる.

主な方法:

  • ハイブリッド平均 (HAM) インターポレーション法の開発と実施
  • CFDを用いたコーン・ジェット・レジムの電子スプレーの数値シミュレーション.
  • HAM,WAM,WHMの比較分析は,電荷分布,半月板の進化,ドロップレット形成に焦点を当てた数値的および実験的ベンチマークを用いて行われます.

主要な成果:

  • HAM方法は,WAMとWHMと比較して,電場分布とインターフェイス力のモデル化において優れた精度を示しています.
  • HAMはビーム電流予測で4.5%のエラーを達成し,WHM (10.4%) とWAM (17.5%) を大幅に上回った.
  • ドロップレット直径の予測では,HAMは1.2%の誤差を示し,WHMは11.8%,WAMは11.2%の誤差を示した.

結論:

  • ハイブリッド平均平均 (HAM) インターポレーション方法は,電水ダイナミック原子化のための数値シミュレーションの正確性と信頼性を大幅に向上させます.
  • 複雑なEHDシステムにおけるCFDモデルの予測能力を高めるには,適切なインターポレーション方法を選択することが重要です.
  • HAMは,WHMの安定性とWAMの簡素性を組み合わせ,インターフェイスのダイナミクスと電荷特性モデリングの改善を図るバランスの取れたアプローチを提供します.