Algorithm to Generate Liutex Core Lines Based on Forward Liutex Magnitude Gradient Lines DOI Creative Commons
Yifei Yu, Chaoqun Liu

IntechOpen eBooks, Journal Year: 2023, Volume and Issue: unknown

Published: Dec. 4, 2023

Vortex definition and identification are extremely important for the study of fluid dynamics research. Liutex is a newly proposed concept that correctly represents vortex. vector whose direction local rotation axis magnitude twice angular speed. To identify unique structure vortex, method known as Core Line has been developed, which displays rotational core However, original manual method, not practical real application, an automatic algorithm required usage. Xu et al. by selecting best line from group candidate lines, progress. In this chapter, another perspective to solve problem, new introduced based on forward gradient lines. Since lines have feature they advance maximums, route will still result in line, avoids process find line. This achieved some success Lambda vortex early boundary layer transition.

Language: Английский

Study on Liutex-driven reward for intelligent flow control by dynamic feature-based deep reinforcement learning DOI Creative Commons

Qi Wang,

Xiangrui Dong,

Setthivoine You

et al.

AIP Advances, Journal Year: 2025, Volume and Issue: 15(5)

Published: May 1, 2025

The issue of flow separation over an airfoil under weak turbulent conditions is addressed and resolved through the deep reinforcement learning (DRL) strategy. To suppress generation instability vortex shedding alley airfoil, a novel reward function named RLiutex, considering suppression rigid rotation intensity core size vortex, first proposed in this paper. great potential Liutex-driven for effective large eddy elimination aerodynamic optimization verified work. Furthermore, dynamic feature-based DRL (DF-DRL) framework redeveloped to markedly enhance efficiency convergence speed. combination with DF-DRL results exceptional performance, minimal fluctuations both drag lift coefficients, highlighting approach advanced control strategies.

Language: Английский

Citations

0
Optimal Jet Flow Control for Suppressing Three-Dimensional Vortex-Induced Motion in Floating Cylinders at Subcritical Reynolds Numbers DOI
Wulong Hu,

Haishan Xia,

Lei Li

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
Optimal Jet Flow Control for Suppressing Three-Dimensional Vortex-Induced Motion in Floating Cylinders at Subcritical Reynolds Numbers DOI
Wulong Hu,

Haishan Xia,

Lei Li

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
Current Review on Numerical Simulation of Synthetic Jet (SJ) Cooling DOI Creative Commons

Nawal Radhiah,

S.M. Firdaus, A. M. Yusof

et al.

CFD letters, Journal Year: 2023, Volume and Issue: 15(5), P. 1 - 17

Published: March 16, 2023

This paper reviews the working principles and numerical approach for synthetic jet cooling in previous studies. It is essential to relevant research within study scope order further enhance improvement of technology. Furthermore, can cut cost save time compared experimental works. Numerical simulation crucial expedite product enhancement as it opens up big potential electronic device application. Studies carried out by many scholars this publication have demonstrated that resonance frequency enhances performance jet. Reynold numbers vary with frequency, greater produced higher heat transfer coefficients. The majority researchers also chosen cylindrical cavity type because offers superior velocity output, which improves performance. According studies, a smaller diameter leads output number

Language: Английский

Citations

0
Algorithm to Generate Liutex Core Lines Based on Forward Liutex Magnitude Gradient Lines DOI Creative Commons
Yifei Yu, Chaoqun Liu

IntechOpen eBooks, Journal Year: 2023, Volume and Issue: unknown

Published: Dec. 4, 2023

Vortex definition and identification are extremely important for the study of fluid dynamics research. Liutex is a newly proposed concept that correctly represents vortex. vector whose direction local rotation axis magnitude twice angular speed. To identify unique structure vortex, method known as Core Line has been developed, which displays rotational core However, original manual method, not practical real application, an automatic algorithm required usage. Xu et al. by selecting best line from group candidate lines, progress. In this chapter, another perspective to solve problem, new introduced based on forward gradient lines. Since lines have feature they advance maximums, route will still result in line, avoids process find line. This achieved some success Lambda vortex early boundary layer transition.

Language: Английский

Citations

0