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高密度比および複雑な固体境界を持つ3次元相場格子ボルツマンモデルに実装された濡れ境界スキーム
Changli Wang1, Chengjie Zhan2, Zhenhua Chai2
1Huazhong University of Science and Technology, School of Mechanical Science and Engineering, Wuhan 430074, People's Republic of China.
Physical review. E
|January 21, 2026
まとめ
本研究では、相場格子ボルツマン(LB)シミュレーションのための新しい濡れ境界スキームを導入します。この手法は、複雑な3D表面上の大きな密度比を持つ気液固流を正確にモデル化します。
科学分野:
- 計算流体力学
- 多相流シミュレーション
- 相場モデリング
背景:
- 大きな密度比を持つ気液固系のシミュレーションは、特に3次元の曲がった固体表面の正確な処理において、課題を提示します。
- 既存の相場格子ボルツマン(LB)法は、複雑な形状の系統的かつ正確な処理に苦労しています。
研究 の 目的:
- 相場LB法のための新しい濡れ境界スキームを開発および検証すること。
- 複雑な固体表面を伴う高密度比(最大1000)の多相流の正確なシミュレーションを可能にすること。
- 新しい濡れダイナミクス現象を探求すること。
主な方法:
- 密度比1000までの処理が可能な相場LBモデルを開発しました。
- 自由エネルギーアプローチを用いて固体境界の位置と法線ベクトルを特定しました。
- 空間依存補間スキームを実装して濡れ条件を課しました。
主要な成果:
- 球上の液滴、管内の毛管上昇、円錐状繊維上の液滴というベンチマークケースを用いて提案手法を検証しました。
- 静的および動的濡れプロセスのシミュレーションにおいて高い精度を示しました。
- 任意に複雑な3次元曲面を処理することに成功しました。
- 円錐状繊維上の液滴ダイナミクスにおいて、2つの新しいべき乗則挙動を観察しました。
結論:
- 提案された濡れ境界スキームは、大きな密度比と複雑な形状を持つ気液固流のシミュレーションにおける限界を効果的に解決します。
- この手法は、多様な濡れシナリオに対して高い精度と堅牢性を達成します。
- このモデルは、濡れダイナミクスの新しい現象の発見に可能性を示しています。
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