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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…
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…