Zobrazeno 1 - 10
of 195
pro vyhledávání: '"Elfring, Gwynn"'
Organisms often swim through fluids that are spatially inhomogeneous. If the fluids are polymeric, gradients in polymer concentration may lead to gradients in both fluid viscosity and elasticity. In this letter, we present theoretical results for the
Externí odkaz:
http://arxiv.org/abs/2411.04226
Autor:
Boudina, Mouad, Elfring, Gwynn J.
We study equilibrium states of a drop between flexible sheets clamped on both ends. Revisiting first the case of parallel sheets, we find multiple equilibria which we classify in a parameter space. In solution branching diagrams we identify hysteresi
Externí odkaz:
http://arxiv.org/abs/2407.07994
Autor:
Shaik, Vaseem A., Elfring, Gwynn J.
We find the mixing induced by a small swimming organism in a density stratified fluid. We model the swimmer as a spherical squirmer and quantify mixing through a mixing efficiency that is the ratio of rate of change of potential energy of fluid to th
Externí odkaz:
http://arxiv.org/abs/2407.05166
A new gradient-based adaptive sampling method is proposed for design of experiments applications which balances space filling, local refinement, and error minimization objectives while reducing reliance on delicate tuning parameters. High order local
Externí odkaz:
http://arxiv.org/abs/2405.04624
Publikováno v:
J. Fluid Mech. 998 (2024) A2
In this note, we study the effect of viscosity gradients on the energy dissipated by the motion of microswimmers and the associated efficiency of that motion. Using spheroidal squirmer model swimmers in weak linearly varying viscosity fields, we find
Externí odkaz:
http://arxiv.org/abs/2405.02432
Wormlike micellar solutions formed by long-chained zwitterionic surfactants show gel-like rheology at room temperature and have recently been found to exhibit other complex and interesting rheological features. We study the dynamics of these wormlike
Externí odkaz:
http://arxiv.org/abs/2401.12102
Autor:
Ge, Zhouyang, Elfring, Gwynn J.
Active suspensions encompass a wide range of complex fluids containing microscale energy-injecting particles, such as cells, bacteria or artificially powered active colloids. Because they are intrinsically non-equilibrium, active suspensions can disp
Externí odkaz:
http://arxiv.org/abs/2311.09448
In this paper, we explore the hydrodynamics of spheroidal active particles in viscosity gradients. This work provides a more accurate modeling approach, in comparison to spherical particles, for anisotropic organisms like Paramecium swimming through
Externí odkaz:
http://arxiv.org/abs/2310.18806
Autor:
Boudina, Mouad, Elfring, Gwynn J.
We study the imbibition of a wetting liquid between flexible sheets that are fixed on both ends. Assuming a narrow gap between the sheets, we solve the lubrication equation coupled with slender body deformation. When the sheets are parallel, we find
Externí odkaz:
http://arxiv.org/abs/2308.06257
Autor:
Shaik, Vaseem A., Elfring, Gwynn J.
Organisms often swim through density stratified fluids. In this Letter, we investigate the dynamics of small active particles swimming in density gradients and report theoretical evidence of taxis as a result of density stratification ($\textit{densi
Externí odkaz:
http://arxiv.org/abs/2308.00207