1 citations · 2 across the 10 of their papers we have counts for
10 papers
A Relative Liutex Method for Vortex Identification
Jiawei Chen, Yifei Yu, Chaoqun Liu
A relative Liutex vortex identification method is proposed in this study, together with its explicit mathematical formulation. The method is designed to identify vortical structure…
A Dynamic Subgrid-Scale Model Based on Liutex Theory for Wall-Bounded Turbulent Flows
Jiawei Chen, Yifei Yu, Chaoqun Liu
Accurate subgrid-scale (SGS) modeling remains a major challenge in large eddy simulation (LES), particularly for wall-bounded turbulent flows with strong near-wall anisotropy. This…
Near-Wall Scaling and Separation Prediction of a Rotation-Based Subgrid-Scale Stress Model
Jiawei Chen, Yifei Yu, Emran Hossen +1
This paper presents an in-depth analysis of a novel subgrid-scale stress model proposed in 2022, which utilizes the rotational part of the velocity gradient as the velocity scale f…
An objective vortex identification method
Yifei Yu, Yiqian Wang, Chaoqun Liu
Generally, the vortex structures should be independent of the observers who are moving, especially when their coordinates are non-inertial, which may result in confusions in commun…
Principal Decomposition of Velocity Gradient Tensor in the Cartesian Coordinates
Chaoqun Liu, Yifei Yu, Yisheng Gao
Traditional Cauchy-Stokes decomposition of velocity gradient tensor gives a symmetric and an anti-symmetric subtensors which are called the strain-rate and vorticity tensors. There…
A mathematical study on the local fluid rotation axis
Charles Nottage, Yifei Yu, Chaoqun Liu
As widely recognized, vortex represents flow rotation. Vortex should have a local rotation axis as its direction and angular speed as its strength. Vorticity vector has been consid…
Liutex-based Modified Navier-Stokes Equation
Yifei Yu, Jianming Liu, Yonghua Yan +3
The Navier-Stokes (NS) partial differential equations, as the governing equation of fluid dynamics, are based on particles with zero volume. In such a condition, conservation law o…
Correlation Analysis among Vorticity, Q method and Liutex
Yifei Yu1, Pushpa Shrestha, Oscar Alvarez +2
Influenced by the fact that vorticity represents rotation for rigid body, people believe it also works for fluid flow. However, the theoretical predictions by vorticity do not matc…
Stretching and Shearing Contamination Analysis for Liutex/Rortex and Other Vortex Identification Methods
Pushpa Shrestha, Charles Nottage, Yifei Yu +2
Although traditional vortex identification methods such as Q, Delta, Lambda2, Lambdaci remain popular in the identification and visualization of vortices, these methods count on sh…
A Liutex based definition of vortex axis line
Chaoqun Liu, Yi-sheng Gao, Jian-ming Liu +1
Eulerian local region-type vortex identification criteria, including the criterion, the criterion and the criterion et al., are widely used for vortex identification due to the sim…