Zobrazeno 1 - 10
of 97
pro vyhledávání: '"Singh, Rahul K."'
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
Autor:
Singh, Rahul K.
The dynamics of fibres, modelled as a sequence of inertial beads linked via elastic springs, in turbulent flows is dictated by a non-trivial interplay of their inertia and elasticity. Such elastic, inertial fibres preferentially sample a three-dimens
Externí odkaz:
http://arxiv.org/abs/2406.06033
Autor:
Singh, Rahul K., Rosti, Marco E.
The addition of polymers modifies a flow in a non-trivial way that depends on fluid inertia (given by the Reynolds number Re) and polymer elasticity (quantified by the Deborah number De). Using direct numerical simulations, we show that polymeric flo
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
A hydrodynamic model of active, low Reynolds number suspensions, shows the emergence of an asymptotic state with a universal spectral scaling and non-Gaussian (intermittent) fluctuations in the velocity field. Such states arise when these systems are
Externí odkaz:
http://arxiv.org/abs/2207.12227
Publikováno v:
Processing and Application of Ceramics, Vol 17, Iss 4, Pp 428-435 (2023)
Because of their high stability, innocuous behaviour, outstanding electric properties and multi-functionality, lead-free double perovskites have emerged as a promising alternative to lead-based perovskites. We present here the structural, microstruct
Externí odkaz:
https://doaj.org/article/630ca1eb6f1849b58fa8602a9bfbcc75
Publikováno v:
Physical Review Fluids 7.3 (2022): 033101
We show that Lagrangian measurements in active turbulence bear imprints of turbulent and anomalous streaky hydrodynamics leading to a self-selection of persistent trajectories - Levy walks - over diffusive ones. This emergent dynamical heterogeneity
Externí odkaz:
http://arxiv.org/abs/2112.00667
Publikováno v:
Phys. Rev. Lett. 127, 118001 (2021)
Bacterial swarms display intriguing dynamical states like active turbulence. Using a hydrodynamic model we now show that such dense active suspensions manifest super-diffusion, via L\'evy walks, which masquerades as a crossover from ballistic to diff
Externí odkaz:
http://arxiv.org/abs/2105.07872
We investigate the gravitational settling of a long, model elastic filament in homogeneous isotropic turbulence. We show that the flow produces a strongly fluctuating settling velocity, whose mean is moderately enhanced over the still-fluid terminal
Externí odkaz:
http://arxiv.org/abs/2101.00385
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