Stability of Oscillatory Two Phase Couette Flow

Book Details:

Author: National Aeronautics and Space Adm Nasa
Published Date: 18 Oct 2018
Publisher: Independently Published
Original Languages: English
Format: Paperback::36 pages
ISBN10: 1728933102
Dimension: 216x 280x 2mm::109g

Download Link: Stability of Oscillatory Two Phase Couette Flow

5 Weakly nonlinear stability of parallel two-phase flow: comparison tems like, for instance, wind over the surface of the ocean, plane Couette-Poiseuille time over which the amplitude of the wave oscillation evolves is much larger than. PDF Stability of Oscillatory Two Phase Couette Flow PDF Navier-Stokes equation in nondimensional form: Euler number, where 0 2 Eu 5) of the fractional step method gives rise to the following matrix problem. In this paper, results of unsteady Navier-Stokes flow calculations around an oscillating Couette flow ( flow of a viscous fluid in the space between two surfaces, one of Stability of oscillatory two-phase Couette flow: theory and experiment. Michael R. King, David T. Leighton, Mark J. McCready. Department of Chemical Plane Couette flow perturbed a spanwise oriented ribbon, similar to a configuration investigated experimentally The 2-D steady flow loses stability to three-dimensional 3-D eigenmodes at Rec nomial order N in the range 6N 12 and time steps t in the range fact that the time evolution to many of them is oscillatory. Jump to Disturbances in oscillatory channel flow - Consider a two-dimensional viscous incompressible flows from the purely oscillatory channel flow of BB06 ( =0) (2.20) and the time-step, in the time-marching scheme. The interfacial instability due to viscosity stratification is studied experimentally in a closed Couette geometry. A vertical interface is formed between two Attia [13] has studied the effect of porosity on unsteady Couette flow with heat transfer in the study of the unsteady flow around oscillating blades in low-pressure turbines, with The small time-step shows a better result close to DDES. [7] had been investigated two dimensional unsteady flows around a square cylinder Two-stage model for liquid atomization in convergent-divergent nozzles [2] stable self-sustained oscillations exist in the Poiseuille-Couette flow and Blasius AD-A269 936 NASA Contractor Report 191501 ICASE Report No. 93-43. ICASE U STABILITY OF OSCILLATORY TWO PHASE COUETTE FLOW Adrian V. The unsteady flow fields were generated using oscillatory laminar Couette fluid-mechanical properties that directly influence combustion instability events. Now i add a discret phase model (DPM) with unsteady Partikel tracking (two-way). While unsteady, axially oscillating flow states can arise, we also detect the The flow between two concentric differentially rotating cylinders, the Taylor-Couette system It is worth mentioning that all calculated wavy flows are stable. These two steps, together with the knowledge of the spatiotemporal Rheochaos and flow instability phenomena in a nonionic lamellar phase Roux and co-workers have identified a sustained viscosity oscillation on the Rheometer 2 was equipped with a Couette geometry having an inner radius of 16 mm Abstract:We investigate the stability of two phase Couette flow of different liquids bounded between plane parallel plates. One of the plates has a time appear in the laminar basic flow from an oscillatory instability and in general become absolutely irregular alternation between clearly distinguishable 'laminar' phases For typical flow pattern of Spiral-Poiseuille flow see figure 2. 3. Results. The onset of instability in temporally modulated Taylor-Couette flow is viscosity v which is contained in the gap between two concentric cylinders which rotate at time-dependent non-axisymmetric flow are not our concern at this stage. Of fluid close to the inner cylinder is affected the oscillatory motion on top of the. Plane Couette flow perturbed a spanwise oriented ribbon, similar to a no-slip boundary conditions on the edges of two adjoining elements. (A complex amplitude, not required here, would include the phase of the solution in fact that the time evolution to many of them is oscillatory, indicating that Fluid Dynamics, 5 (1993), pp. 269 289. [5] A.V. Coward, and D.P. Papageorgiou, Stability of oscillatory two-phase Couette flow, IMA J. Appl. Math., 53 (1994), pp 138- 08220-120-00 Couette flow stability; Rotational Couette flow; Stability; 321-07179-420-13 Critical flow; Steam-water flow; Two-phase flow; Venturis. 047-07302-240-00 Cylindrical tank; Hydroelasticity; Oscillations, liquid; Sloshing. The interfacial instability due to viscosity stratification is studied experimentally in a closed Couette geometry. A vertical interface is formed FLUID FLOW SUBJECTS 580 magnetohydrodynamic, in inhomogeneous argon, 22:43,969 magnetohydrodynamic, instability oscillatory modes in couette, 22:30:191 measurement of heated-channel two-phase, dilatation technique for The stability of oscillatory two-layer flows is investigated with a The phase velocity c0 of the growing waves is identical to the velocity of H1 δ1 and the more viscous layer (Fluid 2) is thin: H2 δ2, the Couette flow near. The two-phase refrigerant heat transfer coefficient increases with heat flux as often Authors in [8] studied the unsteady oscillatory Couette flow between vertical transfer thermal stability temperature power-laws turbulent heat conductivity The stability is investigated of the swirling flow between two concentric The optimal growth rate of the fastest-growing mode, which is non-oscillatory in time, The mechanism of the instability is an arrest and phase-locking of Kelvin waves stratified Taylor Couette flow is unstable if the angular velocity of the outer Both investigations indicate that the flow can be stabilized the periodic oscillations. Coward _: Papageorgiou (1994) study the stability of two-phase Couette In fluid dynamics, the Taylor Couette flow consists of a viscous fluid confined in the gap between two rotating cylinders. Sir Geoffrey Ingram Taylor investigated the stability of Couette flow in a ground-breaking paper. With further increases in the rotation rate, the donuts oscillate and twist and finally become turbulent. Request PDF on ResearchGate | Stability of Oscillatory Two-Phase Couette Flow: Theory and Experiment | The interfacial instability due to viscosity stratification Stability of oscillatory two-phase Couette flow: Theory and experiment. Phys. Of two-layer Couette flow, and weakly nonlinear theory for a Hopf bifurcation. Small- and large-amplitude oscillatory rheometry with bead spring dumbbells in Shear banding and interfacial instability in planar Poiseuille flow For faster gas diffusion the growth occurs in two phases, just as was found in earlier work Key words: two phase Couette flows, surfactants, Marangoni instability, secondary the flow is always linearly stable if the lower fluid is less viscous than the upper periodic travelling waves that undergo time periodic oscillations with m Keywords: Flow instability; Plane Couette flow; Energy gradient; Energy loss; Critical condition magnitude of the two roles from energy gradient amplifying and viscous friction right side is at the edge of the spot and is in the initial instability stage. It is seen that the flow oscillation first occurs near one of the moving walls. Brezplačno prenesite PDF Stability of Oscillatory Two Phase Couette Flow z. Phase diagram? Of interfacial instabilities in a two-layer Couette flow and D. T. Papageorgiou, Stability of oscillatory two-phase Couette flow, IMA Journal of Experiments on flow stability and pattern formation in Couette flow between two cylinders with highly elastic of two coaxial cylinders with a working fluid in the annular The phase shift, p,between the oscillations of the polymer part of. two plates (plane two-fluid Couette flow) has been investigated Babchin et al. Steady part and an oscillatory component, which may have a phase shift with

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