Linear mechanism of wave emergence from vortices in smooth shear flows

被引：90
作者：
Chagelishvili, GD
Tevzadze, AG
Bodo, G
Moiseev, SS
机构：
[1] SPACE RES INST, MOSCOW 117810, RUSSIA
[2] OSSERV ASTRON TORINO, I-10025 PINO TORINESE, ITALY
来源：
PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 17期
关键词：
D O I：
10.1103/PhysRevLett.79.3178
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A new linear mechanism of wave abrupt emergence from vortices in smooth shear flows is found. The phenomenon is closely related to non-normality of linear dynamics of disturbances in shear flows and is best interpreted in the framework of a nonmodal approach-by tracing of linear dynamics of spatial Fourier harmonics of vortex in time. Found phenomenon, demonstrated in the Letter for the simplest example of unbounded, compressible, plane Couette flow, should be important for numerous engineering applications and should be realized in various terrestrial and astrophysical shear flows. [S0031-9007(97)04399-8].
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收藏
页码：3178 / 3181
页数：4
相关论文
共 33 条
[1]   A MOSTLY LINEAR-MODEL OF TRANSITION TO TURBULENCE [J].
BAGGETT, JS ;
DRISCOLL, TA ;
TREFETHEN, LN .
PHYSICS OF FLUIDS, 1995, 7 (04) :833-838
[2]   A POWERFUL LOCAL SHEAR INSTABILITY IN WEAKLY MAGNETIZED DISKS .4. NONAXISYMMETRIC PERTURBATIONS [J].
BALBUS, SA ;
HAWLEY, JF .
ASTROPHYSICAL JOURNAL, 1992, 400 (02) :610-621
[3]  
BROADBENT EG, 1979, PHILOS T R SOC A, V290, P357
[4]   3-DIMENSIONAL OPTIMAL PERTURBATIONS IN VISCOUS SHEAR-FLOW [J].
BUTLER, KM ;
FARRELL, BF .
PHYSICS OF FLUIDS A-FLUID DYNAMICS, 1992, 4 (08) :1637-1650
[5]   Effect of coupling and linear transformation of waves in shear flows [J].
Chagelishvili, GD ;
Rogava, AD ;
Tsiklauri, DG .
PHYSICAL REVIEW E, 1996, 53 (06) :6028-6031
[6]   Acoustic waves in unbounded shear flows [J].
Chagelishvili, GD ;
Khujadze, GR ;
Lominadze, JG ;
Rogava, AD .
PHYSICS OF FLUIDS, 1997, 9 (07) :1955-1962
[7]   HYDRODYNAMIC STABILITY OF COMPRESSIBLE PLANE COUETTE-FLOW [J].
CHAGELISHVILI, GD ;
ROGAVA, AD ;
SEGAL, IN .
PHYSICAL REVIEW E, 1994, 50 (06) :R4283-R4285
[8]   MECHANISM OF ENERGY TRANSFORMATIONS IN SHEAR MAGNETOHYDRODYNAMIC FLOWS [J].
CHAGELISHVILI, GD ;
HRISTOV, TS ;
CHANISHVILI, RG ;
LOMINADZE, JG .
PHYSICAL REVIEW E, 1993, 47 (01) :366-374
[9]   Magnetohydrodynamic waves linear evolution in parallel shear flows: Amplification and mutual transformations [J].
Chagelishvili, GD ;
Chanishvili, RG ;
Lominadze, JG ;
Tevzadze, AG .
PHYSICS OF PLASMAS, 1997, 4 (02) :259-269
[10]  
CHAGELISHVILI GD, 1993, P 4 INT C PLASM PHYS, P23
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