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

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

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dbfc5ad8756541cc42cd2124ecdd3709
http://arxiv.org/abs/1605.07635

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

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::218c432500d99650761e06549b5bd07c
https://doi.org/10.1103/physrevlett.111.084501

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

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8666b1a2a647ff5d0006beb980c3b57e
https://doi.org/10.1103/physrevlett.102.124502

ZOMBIE VORTEX INSTABILITY. II. THRESHOLDS TO TRIGGER INSTABILITY AND THE PROPERTIES OF ZOMBIE TURBULENCE IN THE DEAD ZONES OF PROTOPLANETARY DISKS.

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

Publikováno v: Astrophysical Journal; 12/20/2016, Vol. 833 Issue 2, p1-1, 1p