159 citations · 278 across the 11 of their papers we have counts for
11 papers
Emergence of chaos and fractality in the basin boundary of subcritical shear flow
Baoying Wang, Roger Ayats, Kengo Deguchi +2
From a dynamical systems perspective of subcritical transition in shear flows, the basin boundary separating the laminar and turbulent attractors, along with the edge state that go…
Mathematically established chaos and forecast of statistics with recurrent patterns in Taylor-Couette flow
Baoying Wang, Roger Ayats, Kengo Deguchi +2
The transition to chaos in the subcritical regime of counter-rotating Taylor-Couette flow is investigated using a minimal periodic domain capable of sustaining coherent structures.…
Effects of turbulence boundary conditions on Spalart-Allmaras RANS simulations for active flow control applications
Navid Monshi Tousi, Josep M. Bergada, Fernando Mellibovsky
We assess the suitability of Reynolds-Averaged Navier-Stokes (RANS) simulation using the Spallart-Almaras (SA) turbulence model as a closure in analysing the performance of fluidic…
Feigenbaum universality in subcritical Taylor-Couette flow
Baoying Wang, Roger Ayats, Kengo Deguchi +2
Feigenbaum universality is shown to occur in subcritical shear flows. Our testing ground is the counter-rotation regime of the Taylor-Couette flow, where numerical calculations are…
Self-sustainment of coherent structures in counter-rotating Taylor-Couette flow
B. Wang, R. Ayats, K. Deguchi +2
We investigate the local self-sustained process underlying spiral turbulence in counter-rotating Taylor-Couette flow using a periodic annular domain, shaped as a parallelogram, two…
Square cylinder in the interface of two different-velocity streams
Reda El Mansy, Wasim Sarwar, Josep M Bergada +1
We investigate the incompressible flow past a square cylinder immersed in the wake of an upstream nearby splitter plate separating two streams of different velocity. The bottom str…
Fully nonlinear mode competitions in magnetised Taylor-Couette flow
R. Ayats, K. Deguchi, F. Mellibovsky +1
We study the nonlinear mode competition of various spiral instabilities in magnetised Taylor-Couette flow. The resulting finite-amplitude mixed-mode solution branches are tracked u…
Emergence of spatio-temporal dynamics from exact coherent solutions in pipe flow
Paul Ritter, Fernando Mellibovsky, Marc Avila
Turbulent-laminar patterns are ubiquitous near transition in wall-bounded shear flows. Despite recent progress in describing their dynamics in analogy to non-equilibrium phase tran…
Streamwise-localized solutions at the onset of turbulence in pipe flow
Marc Avila, Fernando Mellibovsky, Nicolas Roland +1
Although the equations governing fluid flow are well known, there are no analytical expressions that describe the complexity of turbulent motion. A recent proposition is that in an…
From travelling waves to mild chaos: a supercritical bifurcation cascade in pipe flow
Fernando Mellibovsky, Bruno Eckhardt
We study numerically a succession of transitions in pipe Poiseuille flow that leads from simple travelling waves to waves with chaotic time-dependence. The waves at the origin of t…
Takens-Bogdanov bifurcation of travelling wave solutions in pipe flow
F. Mellibovsky, B. Eckhardt
The appearance of travelling-wave-type solutions in pipe Poiseuille flow that are disconnected from the basic parabolic profile is numerically studied in detail. We focus on soluti…