04169nam a22006135i 4500 978-981-97-8608-4 DE-He213 20251030113304.0 cr nn 008mamaa 241116s2024 si | s |||| 0|eng d 9789819786084 978-981-97-8608-4 10.1007/978-981-97-8608-4 doi QA808.2 PHD bicssc SCI065000 bisacsh PHD thema Proceedings of the Vortex Workshop [electronic resource] : VW2023, December 11-13, San Diego, USA / edited by Yiqian Wang, Chaoqun Liu, Yan Li. 1st ed. 2024. Singapore : Springer Nature Singapore : Imprint: Springer, 2024. XXI, 246 p. 175 illus., 150 illus. in color. online resource. text txt rdacontent computer c rdamedia online resource cr rdacarrier text file PDF rda Springer Proceedings in Physics, 1867-4941 ; 309 Written by the leading experts in the field, this book results from Vortex Workshop 2023 which took place in San Diego, the USA, on December 11–13. Vortex is ubiquitous in the universe such as tornado, hurricane, airplane tip vortex, and even star vortex in Galaxy. Vortices are also building blocks, muscles, and sinews of turbulent flows. A vortex is intuitively recognized as a rotational/swirling motion of fluids but until recently had no rigidly mathematical definition. In 1858, Helmholtz first defined vortex as composed of so-called vortex filaments, which are infinitesimal vorticity tubes, which is called as the first generation of vortex definition and identification, or G1. Although G1 has been accepted by the fluid dynamics community and almost all textbooks for over a century, we can find many immediate counterexamples, for example, in the laminar boundary layer, where the vorticity (shear) is very large near the wall, but not rotation (no vortex) exists. To solve these contradictions, many vortex criteria methods have been developed during the past 4 decades. More popular methods are represented by the Q, ∆, criteria methods. These methods have achieved part of success in vortex identification, which are called the second generation of vortex identification or G2. However, G2 has several critical drawbacks. First, they are all scalars which have no rotation axis directions, but vortex is a vector. It is hard or impossible to use a scalar to represent a vector. Second, like vorticity, these criteria methods are all contaminated by shear in different degrees. Third, they are all very sensitive on threshold selections. The recently developed Liutex is called the third generation of vortex definition and identification, or G3, which is a uniquely defined vector. Continuum mechanics. Fluid mechanics. Aerospace engineering. 66335 Astronautics. 66336 Soft condensed matter. 66723 Mathematical physics. Continuum Mechanics. Engineering Fluid Dynamics. Aerospace Technology and Astronautics. 66339 Fluids. 67540 Mathematical Physics. Wang, Yiqian. editor. edt http://id.loc.gov/vocabulary/relators/edt 87232 Liu, Chaoqun. editor. edt http://id.loc.gov/vocabulary/relators/edt 77284 Li, Yan. editor. edt http://id.loc.gov/vocabulary/relators/edt 69850 SpringerLink (Online service) Springer Nature eBook Printed edition: 9789819786077 Printed edition: 9789819786091 Printed edition: 9789819786107 Springer Proceedings in Physics, 1867-4941 ; 309 67384 https://doi.org/10.1007/978-981-97-8608-4 ZDB-2-PHA ZDB-2-SXP 64822 64822