Secondary flows due to finite aspect ratio in inertialess viscoelastic Taylor–Couette flow
نویسندگان
چکیده
منابع مشابه
Global finite amplitude perturbations in medium aspect ratio pipe flow
Results of a numerical study on the finite amplitude global perturbations inducing transition to turbulence in pipe flow are reported. The aim of this analysis is to characterise the basin of attraction of the basic Hagen-Poiseuille flow (which is believed to be lineary stable for all Reynolds numbers Re) by means of the minimal amplitude of an initial global perturbation triggering transition....
متن کاملWorst-case amplification of disturbances in inertialess flows of viscoelastic fluids
Amplification of deterministic disturbances in inertialess channel flows of viscoelastic fluids is studied by analyzing the frequency responses from spatio-temporal body forces to the velocity fluctuations. In strongly elastic flows, we show that velocity fluctuations can exhibit significant amplification even in the absence of inertia. Our analysis demonstrates that streamwise-constant disturb...
متن کاملInfluence of aspect ratio in convection due to nonuniform heating
The influence of fluid depth in a convection problem in which heating is nonuniform is studied. We consider a vessel that has at the bottom a temperature distribution which has Gaussian shape in the transversal direction and whose surface is open to the atmosphere. Coupled buoyancy and thermocapillary effects are taken into account. The results confirm a stationary bifurcation and a prelude of ...
متن کاملWorst-case amplification of disturbances in inertialess Couette flow of viscoelastic fluids
Amplification of deterministic disturbances in inertialess shear-driven channel flows of viscoelastic fluids is examined by analysing the frequency responses from spatiotemporal body forces to the velocity and polymer stress fluctuations. In strongly elastic flows, we show that disturbances with large streamwise length scales may be significantly amplified even in the absence of inertia. For fl...
متن کاملMonodomain response of finite-aspect-ratio macromolecules in shear and related linear flows
Q. Wang Department of Mathematics, Florida State University, Tallahassee, FL 32306-4510, USA Abstract Recent extensions of the Doi kinetic theory for monodisperse nematic liquids describe rigid, axisymmetric, ellipsoidal macromolecules with finite aspect ratio. Averaging and presumed linear flow fields provide tensor dynamical systems for mesoscopic, bulk orientation response, parameterized by ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Fluid Mechanics
سال: 2018
ISSN: 0022-1120,1469-7645
DOI: 10.1017/jfm.2018.746