Zobrazeno 1 - 10
of 143
pro vyhledávání: '"Tammisola, Outi"'
Neural-network models have been employed to predict the instantaneous flow close to the wall in a viscoelastic turbulent channel flow. Numerical simulation data at the wall is utilized to predict the instantaneous velocity-fluctuations and polymeric-
Externí odkaz:
http://arxiv.org/abs/2404.14121
Autor:
Bazesefidpar, Kazem, Tammisola, Outi
Publikováno v:
Physics of Fluids 36, 033119 (2024)
We investigate the dynamic behaviour of a two-dimensional (2D) droplet adhering to a wall in Poiseuille flow at low Reynolds numbers, in a system where either the droplet is viscoelastic (V/N) or the surrounding medium (N/V). The results reveal that
Externí odkaz:
http://arxiv.org/abs/2401.12693
A numerical study of yield-stress fluids flowing in porous media is presented. The porous media is randomly constructed by non-overlapping mono-dispersed circular obstacles. Two class of rheological models are investigated: elastoviscoplastic fluids
Externí odkaz:
http://arxiv.org/abs/2308.07435
Publikováno v:
Annual Transactions of the Nordic Rheology Society, Vol. 30, 2022
Considering the nonlinear response of non-Newtonian fluids to the local shear exerted on the bulks of fluid, the initially quasi-uniform distribution of the particles might be subject to alteration as well, due to the unbalanced force distribution on
Externí odkaz:
http://arxiv.org/abs/2302.13050
We study the role of the capillary number, $Ca$ and of the surface wettability on the dynamics of the interface between an invading and a defending phase in a porous medium by means of numerical simulations. We employ a hybrid phase field-immersed bo
Externí odkaz:
http://arxiv.org/abs/2210.12507
Using experiments and numerical simulations, we investigate the spontaneous spreading of droplets of aqueous glycerol (Newtonian) and aqueous polymer (shear-thinning) solutions on smooth surfaces. We find that in the first millisecond the spreading o
Externí odkaz:
http://arxiv.org/abs/2208.11410
Autor:
Feneuil, Blandine, Iqbal, Kazi Tassawar, Jensen, Atle, Brandt, Luca, Tammisola, Outi, Carlson, Andreas
We study the interaction-induced migration of bubbles in shear flow and observe that bubbles suspended in elastoviscoplastic emulsions organise into chains aligned in the flow direction, similarly to particles in viscoelastic fluids. To investigate t
Externí odkaz:
http://arxiv.org/abs/2205.06575
Publikováno v:
Journal of Non-Newtonian Fluid Mechanics 307 (2022), 104872
Self-propelled jumping of two polymeric droplets on superhydrophobic surfaces is investigated by three-dimensional direct numerical simulations. Two identical droplets of a viscoelastic fluid slide, meet and coalesce on a surface with contact angle 1
Externí odkaz:
http://arxiv.org/abs/2202.07579
Publikováno v:
International Journal for Numerical Methods for Fluids 94 (2022), 1517-1541
We present a new and efficient phase-field solver for viscoelastic fluids with moving contact line based on a dual-resolution strategy. The interface between two immiscible fluids is tracked by using the Cahn-Hilliard phase-field model, and the visco
Externí odkaz:
http://arxiv.org/abs/2111.04577
Autor:
Izbassarov, Daulet, Tammisola, Outi
Publikováno v:
Physical Review Fluids 5 (2020) 113301
The dynamics of a single elastoviscoplastic (EVP) drop immersed in plane shear flow of a Newtonian fluid is studied by 3D direct numerical simulations using a finite-difference and level-set method combined with the Saramito model for the EVP fluid.
Externí odkaz:
http://arxiv.org/abs/2110.14278