What is instability?

  • (noun): An unstable order.
    See also — Additional definitions below


In numerous fields of study, the component of instability within a system is generally characterized by some of the outputs or internal states growing without bounds. Not all systems that are not stable are unstable; systems can also be marginally stable or exhibit limit cycle behavior.

Read more about Instability.

Some articles on instability:

Tollmien–Schlichting Wave - Physical Mechanism
... In order for a boundary layer to be absolutely unstable (have an inviscid instability), it must satisfy Rayleigh's criterion namely Where represents the y-derivative and is the free stream velocity profile ... It is clear, then, that viscosity must be an important factor in the instability ... however, is the Reynolds stress term and is the primary production method for instability growth ...
Gregory–Laflamme Instability
... theories of gravity in higher dimensions are found to exhibit an instability to small perturbations ... It is very interesting to know the end point of this instability, particularly whether it leads to a phase transition forming a black hole ... and a critical dimension has been found to exist below which the end state of instability is a black hole phase, i.e ...
Al Gosaibi - Omani Invasion and Subsequent Instability
... The Omani invasion began a period of political instability and a quick succession of outside rulers took power with consequent destruction ... The years of almost constant warfare and instability in the period led to a demographic collapse – German geographer Carsten Niebuhr found in 1763 that Bahrain's 360 towns and villages had, through ...
Instability - Instabilities of Stellar Systems
... After the instability has run its course, the system is typically "hotter" (the motions are more random) or rounder than before ... Instabilities in stellar systems include Bar instability of rapidly-rotating disks Jeans instability Firehose instability Gravothermal instability Radial-orbit instability Various ...
List Of Hydrodynamic Instabilities
... Instability Field Person(s) Named After Bénard instability Natural convection, Rayleigh–Bénard convection Henri Bénard Benjamin–Feir instability Surface gravity waves T ... Feir Buneman instability Plasma physics Oscar Buneman Cherenkov instability Plasma physics Pavel Alekseevič Čerenkov Chromo-Weibel instability Plasma ... Weibel Crow instability Aerodynamics S ...

More definitions of "instability":

  • (noun): The quality or attribute of being unstable and irresolute.
    Synonyms: unstableness
  • (noun): A state of disequilibrium (as may occur in cases of inner ear disease).
    Synonyms: imbalance, unbalance
  • (noun): Unreliability attributable to being unstable.

Famous quotes containing the word instability:

    Not only does the wind of accidents stir me according to its blowing, but I am also stirred and troubled by the instability of my attitude.
    Michel de Montaigne (1533–1592)

    The peace loving nations must make a concerted effort in opposition to those violations of treaties and those ignorings of humane instincts which today are creating a state of international anarchy and instability from which there is no escape through mere isolation or neutrality.... When an epidemic of physical disease starts to spread, the community approves and joins in a quarantine of the patients in order to protect the health of the community against the spread of the disease.
    Franklin D. Roosevelt (1882–1945)

    With one more talent one frequently stands with greater instability than with one less, as a table stands better on three legs than on four.
    Friedrich Nietzsche (1844–1900)