Detailansicht
The Couette-Taylor Problem
Applied Mathematical Sciences 102
ISBN/EAN: 9781461287308
Umbreit-Nr.: 4151249
Sprache:
Englisch
Umfang: x, 234 S.
Format in cm:
Einband:
kartoniertes Buch
Erschienen am 26.09.2011
Auflage: 1/1994
- Zusatztext
- 1. 1 A paradigm About one hundred years ago, Maurice Couette, a French physicist, de signed an apparatus consisting of two coaxial cylinders, the space between the cylinders being filled with a viscous fluid and the outer cylinder being rotated at angular velocity O2. The purpose of this experiment was, follow ing an idea of the Austrian physicist Max Margules, to deduce the viscosity of the fluid from measurements of the torque exerted by the fluid on the inner cylinder (the fluid is assumed to adhere to the walls of the cylinders). At least when O is not too large, the fluid flow is nearly laminar and 2 the method of Couette is valuable because the torque is then proportional to 110, where II is the kinematic viscosity of the fluid. If, however, O is 2 2 increased to a very large value, the flow becomes eventually turbulent. A few years later, Arnulph Mallock designed a similar apparatus but allowed the inner cylinder to rotate with angular velocity 01, while O2 = o. The surprise was that the laminar flow, now known as the Couette flow, was not observable when 0 exceeded a certain "low" critical value Ole, even 1 though, as we shall see in Chapter II, it is a solution of the model equations for any values of 0 and O.
- Autorenportrait
- InhaltsangabeI Introduction.- I.1 A paradigm.- I.2 Experimental results.- I.3 Modeling for theoretical analysis.- I.4 Arrangements of topics in the text.- II Statement of the Problem and Basic Tools.- II.1 Nondimensionalization, parameters.- II.1.1 Basic formulation.- II.1.2 Nondimensionalization.- II.1.3 Couette flow and the perturbation.- II.1.4 Symmetries.- II.1.5 Small gap case.- II.1.5.1 Case when the average rotation rate is very large versus the difference ?1 - ?2.- II.1.5.2 Case when the rotation rate of the inner cylinder is very large.- II.2 Functional frame and basic properties.- II.2.1 Projection on divergence-free vector fields.- II.2.2 Alternative choice for the functional frame.- II.2.3 Main results for the nonlinear evolution problem.- II.3 Linear stability analysis.- II.4 Center Manifold Theorem.- III Taylor Vortices, Spirals and Ribbons.- III.1 Taylor vortex flow.- III.1.1 Steady-state bifurcation with O(2)-symmetry.- III.1.2 Identification of the coefficients in the amplitude equation.- III.1.3 Geometrical pattern of the Taylor cells.- III.2 Spirals and ribbons.- III.2.1 The Hopf bifurcation with O(2)-symmetry.- III.2.2 Application to the Couette-Taylor problem.- III.2.3 Geometrical structure of the flows.- III.2.3.1 Spirals.- III.2.3.2 Ribbons.- III.3 Higher codimension bifurcations.- III.3.1 Weakly subcritical Taylor vortices.- III.3.2 Competition between spirals and ribbons.- IV Mode Interactions.- IV.1 Interaction between an axisymmetric and a nonaxisymmetric mode.- IV.1.1 The amplitude equations (6 dimensions).- IV.1.2 Restriction of the equations to flow-invariant subspaces.- IV.1.3 Bifurcated solutions.- IV.1.3.1 Primary branches.- IV.1.3.2 Wavy vortices.- IV.1.3.3 Twisted vortices.- IV.1.4 Stability of the bifurcated solutions.- IV.1.4.1 Taylor vortices.- IV.1.4.2 Spirals.- IV.1.4.3 Ribbons.- IV.1.4.4 Wavy vortices.- IV.1.4.5 Twisted vortices.- IV.1.5 A numerical example.- IV.1.6 Bifurcation with higher codimension.- IV.2 Interaction between two nonaxisymmetric modes.- IV.2.1 The amplitude equations (8 dimensions).- IV.2.2 Restriction of the equations to flow-invariant subspaces.- IV.2.3 Bifurcated solutions.- IV.2.3.1 Primary branches.- IV.2.3.2 Interpenetrating spirals (first kind).- IV.2.3.3 Interpenetrating spirals (second kind).- IV.2.3.4 Superposed ribbons (first kind).- IV.2.3.5 Superposed ribbons (second kind).- IV.2.4 Stability of the bifurcated solutions.- IV.2.4.1 Stability of the m-spirals.- IV.2.4.2 Stability of the (m + 1)-spirals.- IV.2.4.3 Stability of the m-ribbons.- IV.2.4.4 Stability of the (m + 1)-ribbons.- IV.2.4.5 Stability of the interpenetrating spirals SI(0,3) and SI(1,2).- IV.2.4.6 Stability of the interpenetrating spirals SI(1,3) and SI(0,2).- IV.2.4.7 Stability of the superposed ribbons RS(0).- IV.2.4.8 Stability of the superposed ribbons RS(?).- IV.2.5 Further bifurcations.- IV.2.6 Two numerical examples.- V Imperfections on Primary Bifurcations.- V.1 General setting when the geometry of boundaries is perturbed.- V.1.1 Reduction to an equation in H(Qh).- V.1.2 Amplitude equations.- V.2 Eccentric cylinders.- V.2.1 Effect on Taylor vortices.- V.2.2 Computation of the coefficient b.- V.2.3 Effect on spirals and ribbons.- V.3 Little additional flux.- V.3.1 Perturbed Taylor vortices lead to traveling waves.- V.3.2 Identification of coefficients d and e.- V.3.3 Effects on spirals and ribbons.- V.4 Periodic modulation of the shape of cylinders in the axial direction.- V.4.1 Effect on Taylor vortices.- V.4.2 Effects on spirals and ribbons.- V.5 Time-periodic perturbation.- V.5.1 Perturbed Taylor vortices.- V.5.2 Perturbation of spirals and ribbons.- VI Bifurcation from Group Orbits of Solutions.- VI.1 Center manifold for group orbits.- VI.1.1 Group orbits of first bifurcating solutions.- VI.1.1.1 Taylor vortex flow.- VI.1.1.2 Spirals.- VI.1.1.3 Ribbons.- VI.1.2 The center manifold reduction for a group-orbit of steady solutions.- VI.2 Bifurcation from the Taylor vortex flow.- VI.2.1 The stati