134 citations · 1k across the 44 of their papers we have counts for
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Durotaxis in viscoelastic fluids
Vaseem A. Shaik, Jiahao Gong, Gwynn J. Elfring
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…
Swimming efficiency in viscosity gradients
Jiahao Gong, Vaseem A. Shaik, Gwynn J. Elfring
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 squi…
Active spheroids in viscosity gradients
Jiahao Gong, Vaseem A. Shaik, Gwynn J. Elfring
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…
Capillary imbibition in a diverging flexible channel
Mouad Boudina, Gwynn J. Elfring
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…
Statistics and spectral analysis of turbulent duct flows with flexible and rigid polymer solutions
Rodrigo S. Mitishita, Gwynn J. Elfring, Ian A. Frigaard
We present an experimental investigation of turbulent drag reduction with flexible and rigid polymer solutions. The flexible polymer is partially hydrolyzed polyacrylamide (HPAM) a…
Fully turbulent flows of viscoplastic fluids in a rectangular duct
Rodrigo S. Mitishita, Jordan A. MacKenzie, Gwynn J. Elfring +1
Turbulent flows of viscoplastic fluids at high Reynolds numbers have been investigated recently with direct numerical simulations (DNS) but experimental results have been limited.…