143 citations · 155 across the 10 of their papers we have counts for
12 papers
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…
Vortex Core and POD Analysis on Hairpin Vortex Formation in Flow Transition
Sita Charkrit, Chaoqun Liu
In this study, the new concept of vortex core line based on Liutex definition is applied to demonstrate that vortex ring is not part of the Lambda-vortex and the generation of ring…