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Absolute and convective instabilities front velocities

Triggered Fronts in the Complex Ginzburg Landau Equation

We study patterns that arise in the wake of an externally triggered,spatially propagating instability in the complex GinzburgLandau equation.We model the trigger by a spatial inhomogeneity moving with constant speed.In the comoving frame,the trivial state is unstable to the left of the trigger and stable to the right.At the trigger location,spatio-temporally periodic wave trains nucleate.Some results are removed in response to a notice of local law requirement.For more information,please see here.Previous123456NextAbsolute/Convective Instabilities and Front Propagation in Sep 01,2020 Absolute and convective instabilities front velocities#0183;Absolute/Convective Instabilities and Front Propagation in Lipid Membrane Tubes Jo Absolute and convective instabilities front velocities#235;l Tchoufag,1,Amaresh Sahu,zand Kranthi K.Mandadapu1,2,y 1Department of Chemical Biomolecular Engineering,University of California,Berkeley,CA 94720 2Chemical Sciences Division,Lawrence Berkeley National Laboratory,Berkeley,CA 94720 (Dated September1,2020) We analyze the

Onset of DarcyB Absolute and convective instabilities front velocities#233;nard convection under throughflow of a

Couairon,A. Chomaz,J.-M.1997 Absolute and convective instabilities,front velocities and global modes in nonlinear systems. Hirata,S.C. Ouarzazi,M.N.2010 Three-dimensional absolute and convective instabilities in mixed convection of a viscoelastic fluid through a porous medium.Nonlinear convective/absolute instabilities in parallel nonlinearly absolute if a wave packet exists for which v2 NL and v1 NL have opposite signs.Otherwise,it is nonlinearly convective.The relation between linear and nonlinear convective/ absolute instability notions is nontrivial and can be associ-ated with the concept of front-velocity selection,which hasMethods for Diagnosing Regions of Conditional4 Cross section of 2 e and Mg taken normal to 850-300 mb thickness contours 2e Mg +1 2e+ 1 2e-1 Mg Mg-1 In this diagram,isentropes of 2 e are sloped more vertical than lines of absolute geostropic momentum,M g.This implies weak stability (vertical 2

Mechanisms for Absolute Instabilities in Uniform and

Dec 26,2019 Absolute and convective instabilities front velocities#0183;The imposition of density field,representative of reacting flows,suppresses the absolute instability mode by shifting its onset to higher backflow velocities.Further,to investigate the cause of instabilities,a total disturbance energy equation is obtained with various energy feeding/depleting terms.KelvinHelmholtz absolute and convective instabilities of 2004 KelvinHelmholtz absolute and convective instabilities of,and signalling in, dimensional parallel flow of two superimposed immiscible incompressible ideal fluids with constant but nonequal velocities.This flow is unstable for any nonzero velocity difference.Its instability (KelvinHelmholtz (KH) instability),however Hydrodynamics and Nonlinear Instabilities Request PDFAbsolute and convective instabilities,front velocities and global modes in nonlinear systems.Article.Oct 1997; The NG instability is first compared to the linear concept of convective

Hydrodynamics and Nonlinear Instabilities Request PDF

Absolute and convective instabilities,front velocities and global modes in nonlinear systems.Article.Oct 1997; The NG instability is first compared to the linear concept of convective Convective/absolute instability in miscible core-annular Moreover,the fixed location of this destabilization,observed for some particular parameters,suggests an absolute nature of the instability.We present a tentative delineation of the nature (convective or absolute) of the instability and discuss the accessible measurements to experimentally address thisConvective wave front locking for a reactiondiffusion Absolute and convective instabilities,front velocities and global modes in nonlinear systems.Article.Oct 1997; The NG instability is first compared to the linear concept of convective

Convective instability in inhomogeneous media Impulse

as in Fig.1!a,while it is absolute if the perturbation grows at a xed spatial position,as in Fig.1!b.810 Auseful way to distinguish convective from absolute instability is in terms of propagating edge or front velocities assuming a positive leading-edge velocity V+,as is the case here,convective in-Convective and absolute instabilities in the subcritical Convective and absolute instabilities in the subcritical Ginzburg-Landau equation Convective and absolute instabilities in the subcritical Ginzburg-Landau equation Colet,P.; Walgraef,D.; San Miguel,M.1999-10-01 00:00:00 We study the nature of the instability of the homogeneous steady states of the subcritical real Ginzburg-Landau equation in the presence of group velocity.Convective and absolute electrokinetic instability with Convective and absolute electrokinetic instabilities 265 in which a disturbance at the origin is amplied downstream,while an absolutely unstable system is an intrinsic oscillator in which the downstream propagating wave oscillates with an upstream

Convective and Absolute Instabilities in Reacting Bluff

CONVECTIVE AND ABSOLUTE INSTABILITIES IN REACTING BLUFF BODY WAKES Benjamin Emerson,Julia Lundrigan,Jacqueline OConnor,David Noble,Tim Lieuwen laminar flow problems where the convective/absolute instability transition occurs at a well defined value of bifurcation reverse flow velocities.In other words,as the reverse flow Convective and Absolute Instabilities in Reacting Bluff CONVECTIVE AND ABSOLUTE INSTABILITIES IN REACTING BLUFF BODY WAKES Benjamin Emerson,Julia Lundrigan,Jacqueline OConnor,David Noble,Tim Lieuwen laminar flow problems where the convective/absolute instability transition occurs at a well defined value of bifurcation reverse flow velocities.In other words,as the reverse flow Cited by 9Publish Year 2015Author Gioele Balestra,Gioele Balestra,Michael Gloor,Leonhard KleiserAbsolute and convective instability of cylindrical Couette Imposing axial flow in the annulus and/or radial flow through the cylindrical walls in a TaylorCouette system alters the stability of the flow.Theoretical methods and numerical simulations were used to determine the impact of imposed axial and radial flows,homogeneous in the axial direction,on the first transition of TaylorCouette flow in the framework of convective and absolute

Cited by 26Publish Year 2009Author M.d'OLCE,J.Martin,N.Rakotomalala,D.Salin,L.TalonAbsolute and convective instabilities of heated coaxial

May 01,2015 Absolute and convective instabilities front velocities#0183;This study investigates the inviscid,linear spatio-temporal stability of heated,compressible,and incompressible coaxial jet flows.The influence of the temperature ratio and the velocity ratio between the core jet and the bypass stream on the transition from convectively to absolutely unstable flows is studied numerically.The investigation shows that for coaxial jets,absolute instability Cited by 122Publish Year 1997Author Arnaud Couairon,Jean-Marc ChomazAbsolute and convective instabilities,front velocities The nonlinear convective/absolute (NC/NA) instability defined Chomaz (1992) by considering,in infinite homogeneous domains,whether the front separating a bifurcated state from the basic state moves downstream or upstream,is determined using van Saarloos and Hohenberg (1992) results for the selected front velocity.Cited by 122Publish Year 1997Author Arnaud Couairon,Jean-Marc ChomazAbsolute and convective instabilities,front velocities Absolute and convective instabilities,front velocities and global modes in nonlinear systems

CiteSeerX Convective and absolute electrokinetic

CiteSeerX - Document Details (Isaac Councill,Lee Giles,Pradeep Teregowda) Electrokinetic flow instabilities occur under high electric fields in the presence of elec-trical conductivity gradients.Such instabilities are a key factor limiting the robust per-formance of complex electrokinetic bio-analytical systems,but can also be exploited for rapid mixing and flow control for microscale Absolute/Convective Instabilities and Large Frontalwhere absolute instabilities take place.Take the Iceland-Faeroe front (Fig.1) as an example,the dynamical process underlying its meandering is a convective instability in the west followed by an absolute instability in the interior (Liang Robinson,2004).Hence Model setting must admit absolute and convective instabilities,Absolute/Convective Instabilities and Large Frontalwhere absolute instabilities take place.Take the Iceland-Faeroe front (Fig.1) as an example,the dynamical process underlying its meandering is a convective instability in the west followed by an absolute instability in the interior (Liang Robinson,2004).Hence Model setting must admit absolute and convective instabilities,

Absolute/Convective Instabilities and Front Propagation in

Sep 01,2020 Absolute and convective instabilities front velocities#0183;Absolute/Convective Instabilities and Front Propagation in Lipid Membrane Tubes Jo Absolute and convective instabilities front velocities#235;l Tchoufag,1,Amaresh Sahu,zand Kranthi K.Mandadapu1,2,y 1Department of Chemical Biomolecular Engineering,University of California,Berkeley,CA 94720 2Chemical Sciences Division,Lawrence Berkeley National Laboratory,Berkeley,CA 94720 (Dated September1,2020) We analyze theAbsolute versus convective instability of spiral wavesAbsolute 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-eld breakup of spiral wavesAbsolute and convective instability of cylindricalAbsolute and convective instability of cylindrical Couette ow with axial and radial ows Denis Martinand,1 Eric Serre,1 and Richard M.Lueptow2 1LM2P2 UMR 6181,CNRS,Universit Absolute and convective instabilities front velocities#233;s dAix-Marseille,IMT,La Jet Absolute and convective instabilities front velocities#233;-Technop Absolute and convective instabilities front velocities#244;le de Ch Absolute and convective instabilities front velocities#226;teau-Gombert,38 rue Fr Absolute and convective instabilities front velocities#233;d Absolute and convective instabilities front velocities#233;ric Joliot-Curie,13451 Marseille Cedex 20,France

Absolute and convective instability of cylindrical Couette

Imposing axial flow in the annulus and/or radial flow through the cylindrical walls in a TaylorCouette system alters the stability of the flow.Theoretical methods and numerical simulations were used to determine the impact of imposed axial and radial flows,homogeneous in the axial direction,on the first transition of TaylorCouette flow in the framework of convective and absolute Absolute and convective instabilities,front velocities Oct 01,1997 Absolute and convective instabilities front velocities#0183;ELSEVIER Physica D 108 (1997) 236-276 PHYSICA Absolute and convective instabilities,front velocities and global modes in nonlinear systems Amaud Couairon *,Jean-Marc Chomaz LadHyX,CNRS UMR 156,Laboratoire d'Hydrodynamique,t~cole Polytechnique,91 128 Palaiseau Cedex,France Received 23 October 1996; accepted March 1997 Communicated by S.Absolute and convective instabilities of plane turbulent Absolute and convective instabilities have been investigated on the basis of wake velocity profiles with a velocity deficit parameter R.Numerical computations have been carried out for a range of R-values and a stability diagram with two dividing lines was obtained,one defining the boundary between absolute and convective instabilities S ca

Absolute and convective instabilities of heated coaxial

When the bypass-stream velocity is increased,the classical absolute mode known from single jets (inner mode) is first stabilized and then destabilized for high bypass-stream velocities,whereas the outer mode reaches maximum spatio-temporal growth rates when the core-stream velocity is approximately equal to twice the bypass-stream velocity.Absolute and convective instabilities of heated coaxial This study investigates the inviscid,linear spatio-temporal stability of heated,compressible,and incompressible coaxial jet flows.The influence of the temperature ratio and the velocity ratio between the core jet and the bypass stream on the transition from convectively to absolutely unstable flows is studied numerically.The investigation shows that for coaxial jets,absolute instability Absolute and Convective Instability of the African AbstractThe stability of the African easterly jet (AEJ) is examined using idealized numerical simulations.It is found that a zonally homogeneous representation of the AEJ can support absolute inst

12345NextAbsolute and convective instabilities of waves on

Physica D 145 (2000) 233277 Absolute and convective instabilities of waves on unbounded and large bounded domains Bj Absolute and convective instabilities front velocities#246;rn Sandstedea,Arnd Scheelb; a Department of Mathematics,Ohio State University,231 West 18th Avenue,Columbus,OH 43210,USA b Institut f Absolute and convective instabilities front velocities#252;r Mathematik I,Freie Universit Absolute and convective instabilities front velocities#228;t Berlin,Arnimallee 2-6,14195 Berlin,Germany Received 19 October 1999; received in Absolute/Convective Instabilities and Front This model possesses Lifshitz points,where the front dynamics undergo a steady-to-oscillatory bifurcation,thus shedding light on the pattern selection mechanism in neurons.We analyze the stability of biological membrane tubes,with and without a base flow of lipids. Absolute/Convective Instabilities and Front This model possesses Lifshitz points,where the front dynamics undergo a steady-to-oscillatory bifurcation,thus shedding light on the pattern selection mechanism in neurons.We analyze the stability of biological membrane tubes,with and without a base flow of lipids.

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