31 citations · 66 across the 10 of their papers we have counts for
11 papers
Drag and Yielding of Rotating Bodies in Yield-Stress Fluids
Farshad Nazari, Akash Mittal, Kourosh Shoele +1
We investigate the settling dynamics of rotating objects in a yield stress fluid by combining controlled experiments with numerical simulations. Experiments were conducted using cy…
Helical Locomotion in Yield Stress Fluids
Farshad Nazari Kourosh Shoele, Hadi Mohammadigoushki
We report three stages for locomotion of a helical swimmer in yield stress fluids. In the first stage, the swimmer must overcome material's yield strain to generate rotational moti…
A Study of Non-linear Flows and Shear Banding in Wormlike Micelles Under Varying Elasticity, Flow Curvature, and Surfactant Chemistry
Alfredo Scigliani, Hadi Mohammadigoushki
We report the flow dynamics of two shear-banding wormlike micellar solutions with distinct surfactant chemistries in a Taylor-Couette (TC) setup following a startup shear. The solu…
Flow of a two-dimensional liquid foam: Impact of surfactant type and boundary conditions
Farshad Nazari, Andrei Potanin, Hadi Mohammadigoushki
In this study, we experimentally investigate the rheological and flow behavior of two-dimensional (2D) monodisperse aqueous foams, sheared between parallel plates using a custom-ma…
Cavitation Rheology of Model Yield Stress Fluids Based on Carbopol
Hadi Mohammadigoushki, Kourosh Shoele
Measuring surface tension of yield stress fluids has remained a critical challenge due to limitations of the traditional tensiometry techniques. Here, we overcome those limits and…
Kinetics of Shear Banding Flow Formation in Linear and Branched Wormlike Micelles
Peter Rassolov, Alfredo Scigliani, Hadi Mohammadigoushki
We investigate the flow evolution of a linear and a branched wormlike micellar solution with matched rheology in a Taylor-Couette (TC) cell using a combination of particle-tracking…
Squirmer locomotion in a yield stress fluid
Patrick S. Eastham, Hadi Mohammadigoushki, Kourosh Shoele
An axisymmetric squirmer in a Bingham viscoplastic fluid is studied numerically to determine the effect of a yield stress environment on locomotion. The nonlinearity of the governi…
Role of Micellar Entanglement Density on Kinetics of Shear Banding Flow Formation
Peter Rassolov, Hadi Mohammadigoushki
We investigate the effects of micellar entanglement number on the kinetics of shear banding flow formation in a Taylor-Couette flow. Three sets of wormlike micellar solutions, each…
Formation of a strong negative wake behind a helical swimmer in a viscoelastic fluid
S. Wu, T. Solano, K. Shoele +1
We investigate the effects of helical swimmer shape (i.e., helical pitch angle and tail thickness) on swimming dynamics in a constant viscosity viscoelastic (Boger) fluid via a com…
Nuclear Magnetic Resonance Diffusometry of Linear and Branched Wormlike Micelles
Samuel W. Holder, Samuel C. Grant, Hadi Mohammadigoushki
Diffusion studies using nuclear magnetic resonance (NMR) spectroscopy were conducted on two model surfactant solutions of cetyltrimethylammonium bromide/sodium salicylate (CTAB/NaS…
Inertio-elastic instability in Taylor-Couette °ow of a model wormlike micellar system
Hadi Mohammadigoushki, Susan J. Muller
In this work, we use flow visualization and rheometry techniques to study the dynamics and evolution of secondary flows in a model wormlike micellar solution sheared between concen…