Výsledky vyhledávání - "Chung-Hsiang Jiang"

Finding the optimal shape of the leading-and-trailing car of a high-speed train using design-by-morphing

Autor: Chung-Hsiang Jiang, Chiyu Jiang, Philip Marcus, Sahuck Oh

Publikováno v: Computational Mechanics. 62:23-45

We present a new, general design method, called design-by-morphing for an object whose performance is determined by its shape due to hydrodynamic, aerodynamic, structural, or thermal requirements. To illustrate the method, we design a new leading-and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7c8f203b3e152f6cdd1802b03d9e86f5
https://doi.org/10.1007/s00466-017-1482-4

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Zombie Vortex Instability. II. Thresholds to Trigger Instability and the Properties of Zombie Turbulence in the Dead Zones of Protoplanetary Disks

Autor: Philip Marcus, Joseph Barranco, Chung-Hsiang Jiang, Suyang Pei

Publikováno v: The Astrophysical Journal, vol 833, iss 2
Astrophysical Journal, vol 833, iss 2
Marcus, PS; Pei, S; Jiang, CH; & Barranco, JA. (2016). ZOMBIE VORTEX INSTABILITY. II. THRESHOLDS to TRIGGER INSTABILITY and the PROPERTIES of ZOMBIE TURBULENCE in the DEAD ZONES of PROTOPLANETARY DISKS. Astrophysical Journal, 833(2). doi: 10.3847/1538-4357/833/2/148. UC Berkeley: Retrieved from: http://www.escholarship.org/uc/item/043105s0

In Zombie Vortex Instability (ZVI), perturbations excite critical layers in stratified, rotating shear flow (as in protoplanetary disks), causing them to generate vortex layers, which roll-up into anticyclonic zombie vortices and cyclonic vortex shee

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http://arxiv.org/abs/1605.07635

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Zombie Vortex Instability I: A Purely Hydrodynamic Instability to Resurrect the Dead Zones of Protoplanetary Disks

Autor: Philip Marcus, Joseph Barranco, Pedram Hassanzadeh, Chung-Hsiang Jiang, Daniel Lecoanet, Suyang Pei

There is considerable interest in hydrodynamic instabilities in dead zones of protoplanetary disks as a mechanism for driving angular momentum transport and as a source of particle-trapping vortices to mix chondrules and incubate planetesimal formati

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http://arxiv.org/abs/1410.8143

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Three-Dimensional Vortices Generated by Self-Replication in Stably Stratified Rotating Shear Flows

Autor: Suyang Pei, Pedram Hassanzadeh, Chung-Hsiang Jiang, Philip Marcus

Publikováno v: Physical Review Letters. 111

A previously unknown instability creates space-filling lattices of 3D vortices in linearly stable, rotating, stratified shear flows. The instability starts from an easily excited critical layer. The layer intensifies by drawing energy from the backgr

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https://doi.org/10.1103/physrevlett.111.084501

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The Dead Zones of Protoplanetary Disks are Not Dead

Autor: Suyang Pei, Philip Marcus, Pedram Hassanzadeh, Chung-Hsiang Jiang

Publikováno v: EPJ Web of Conferences, Vol 46, p 03006 (2013)

We show that the “dead” zone of a protoplanetary disk fills with robust 3D vortices from a purely hydrodynamic instability. This new instability is not linear and requires a weak finite-amplitude initial perturbation. The instability was not seen

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https://doaj.org/article/b947fd00e6b1444fb17aa4bf3b72592f

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Selection Rules for the Nonlinear Interaction of Internal Gravity Waves

Autor: Philip Marcus, Chung-Hsiang Jiang

Publikováno v: Physical Review Letters. 102

Two intersecting beams of internal gravity waves will generically create two wave packets by nonlinear interaction. The frequency of one packet will be the sum and that of the other packet will be the difference of the frequencies of the intersecting

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https://doi.org/10.1103/physrevlett.102.124502

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