Zobrazeno 1 - 10
of 161
pro vyhledávání: '"Rosti, Marco E"'
The addition of polymers fundamentally alters the dynamics of turbulent flows in a way that defies Kolmogorov predictions. However, we now present a formalism that reconciles our understanding of polymeric turbulence with the classical Kolmogorov phe
Externí odkaz:
http://arxiv.org/abs/2410.03237
Elastoviscoplastic (EVP) fluids, which exhibit both solid-like and liquid-like behavior depending on the applied stress, are critical in industrial processes involving complex geometries such as porous media and wavy channels. In this study, we inves
Externí odkaz:
http://arxiv.org/abs/2409.15935
In this study, we delve into the intricacies of elastoviscoplastic (EVP) fluids, particularly focusing on how polymer additives influence their extensional behavior. Our findings reveal that polymer additives significantly alter the extensional prope
Externí odkaz:
http://arxiv.org/abs/2406.06001
Autor:
Aswathy, M. S., Rosti, Marco E
This study explores the dynamics of finite-size fibers suspended freely in a viscoelastic turbulent flow. For a fiber suspended in Newtonian flows, two different flapping regimes were identified previously by Rosti et al (2018). Here we explore, how
Externí odkaz:
http://arxiv.org/abs/2403.04305
We perform fully coupled numerical simulations using immersed boundary methods of finite-size spheres and fibres suspended in a turbulent flow for a range of Taylor Reynolds numbers $12.8
Externí odkaz:
http://arxiv.org/abs/2310.07986
Autor:
Singh, Rahul K., Rosti, Marco E.
Addition of polymers modifies a turbulent flow in a manner that depends non-trivially on the interplay of fluid inertia, quantified by the Reynolds number $Re$, and the elasticity of the dissolved polymers, given by the Deborah number $De$. We use di
Externí odkaz:
http://arxiv.org/abs/2309.14752
Elastic turbulence is the chaotic fluid motion resulting from elastic instabilities due to the addition of polymers in small concentrations at very small Reynolds ($\mbox{Re}$) numbers. Our direct numerical simulations show that elastic turbulence, t
Externí odkaz:
http://arxiv.org/abs/2308.06997
Publikováno v:
J. Fluid Mech. 987 (2024) A31
We perform direct numerical simulations of surfactant-laden droplets in homogeneous isotropic turbulence with Taylor Reynolds number of 180. The droplets are modelled using the volume of fluid method, and the soluble surfactant is transported using a
Externí odkaz:
http://arxiv.org/abs/2307.15448
Publikováno v:
Journal of Fluid Mechanics 966, A12 (2023)
We show that the energy required by a turbulent flow to displace a given amount of fluid through a straight duct in a given time interval can be reduced by modulating in time the pumping power. The control strategy is hybrid: it is passive, as it req
Externí odkaz:
http://arxiv.org/abs/2305.00214
Flexible filamentous beds interacting with a turbulent flow represent a fundamental setting for many environmental phenomena, e.g., aquatic canopies in marine current. Exploiting direct numerical simulations at high Reynolds number where the canopy s
Externí odkaz:
http://arxiv.org/abs/2303.10009