Apparent Absolute Instability and the Continuous Spectrum
نویسندگان
چکیده
منابع مشابه
existence and approximate $l^{p}$ and continuous solution of nonlinear integral equations of the hammerstein and volterra types
بسیاری از پدیده ها در جهان ما اساساً غیرخطی هستند، و توسط معادلات غیرخطی بیان شده اند. از آنجا که ظهور کامپیوترهای رقمی با عملکرد بالا، حل مسایل خطی را آسان تر می کند. با این حال، به طور کلی به دست آوردن جوابهای دقیق از مسایل غیرخطی دشوار است. روش عددی، به طور کلی محاسبه پیچیده مسایل غیرخطی را اداره می کند. با این حال، دادن نقاط به یک منحنی و به دست آوردن منحنی کامل که اغلب پرهزینه و ...
15 صفحه اولAbsolute versus convective instability of spiral waves
Absolute and convective instabilities of spirals are investigated using the continuous and the so-called absolute spectrum. It is shown that the nature of transport, induced by an absolute instability, is determined by spectral data of the asymptotic wave trains. The results are applied to core and far-field breakup of spiral waves in excitable and oscillatory media.
متن کاملThe rôle of absolute instability in the solar dynamo
The presence of the equator and poles has a profound effect on the critical dynamonumberDf for the onset of dynamo waves and their subsequent nonlinear evolution. The instability threshold is associated with the onset of absolute instability, which is necessary for the existence of a globally unstablemode. With increasingD thewaves become very rapidly nonlinear and the region of activity extend...
متن کاملA note on the absolute instability of wakes
The family of wake profiles formed from the Falkner–Skan boundary-layer solutions with negative pressure gradient, m, was shown in (Woodley and Peake, 1997) to be inviscidly absolutely unstable. However, due to numerical difficulties, the limit m→ 0 was not considered there, although the results that were found appeared to indicate that the double Blasius profile (m = 0) is absolutely unstable....
متن کاملMoist Absolute Instability: The Sixth Static Stability State
where γ is the observed environmental lapse rate, and Γ s and Γ d are the moistand dry-adiabatic lapse rates, respectively. Of particular interest here is state 5, dry absolutely unstable. Typically, this state exists in a shallow surface-based layer (usually < 100 mb deep) and results from an imbalance between the rate at which air adjacent to the ground is heated by conduction and the rate at...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Atmospheric Sciences
سال: 2000
ISSN: 0022-4928,1520-0469
DOI: 10.1175/1520-0469(2000)057<3592:aaiatc>2.0.co;2