72 citations · 317 across the 30 of their papers we have counts for
34 papers
Solid adsorption: the missing mechanism for surfactant contact lines -- a phase-field approach
Parvathy K. Kannan, Kazi T. Iqbal, Diego Díaz +5
We develop a thermodynamically consistent phase-field model for soluble surfactants in two-phase flows, incorporating both interfacial and solid surface adsorption. The model is de…
Polyelectrolyte adsorption at the solid-liquid interface favors receding contact line instability
Léa Delance, Diego Díaz, Arivazhagan G. Balasubramanian +3
Controlling the motion of non-Newtonian drops on surfaces is crucial for applications ranging from inkjet printing to biomedical devices and food processing. While the macroscopic…
Cahn-Hilliard Phase Field modelling captures nanoscale contact line dynamics on high-friction surfaces
Michele Pellegrino, Parvathy K. Kannan, Gustav Amberg +3
Incorporating molecular-scale effects in the description of contact line motion is essential for accurately capturing all sources of energy dissipation in wetting dynamics. This ho…
Sub-Yield Dynamics in Yield-Stress Materials
Alice Woodbridge, Kasra Amini, Fredrik Lundell +4
The mechanical response of yield-stress materials below the yield point remains a subject of debate. Two of the most widely used constitutive models for these materials offer funda…
The coherent structures of EVP Fluid Flow Past a Circular Cylinder
Adrián Corrochano, Kazi Tassawar Iqbal, Saeed Parvar +2
This study investigates the impact of elasticity and plasticity on two-dimensional flow past a circular cylinder at Reynolds number . Ten direct numerical simulations wer…
Potential and challenges of generative adversarial networks for super-resolution in 4D Flow MRI
Oliver Welin Odeback, Arivazhagan Geetha Balasubramanian, Jonas Schollenberger +9
4D Flow Magnetic Resonance Imaging (4D Flow MRI) enables non-invasive quantification of blood flow and hemodynamic parameters. However, its clinical application is limited by low s…
Viscoelasticity of biomimetic scale beams from trapped complex fluids
Pranta Rahman Sarkar, Outi Tammisola, Ranajay Ghosh
We investigate the nonlinear viscoelastic behavior of a biomimetic scale-covered beam in which shear-dependent complex fluids are trapped between overlapping scales under bending l…
Balloon regime: Drop elasticity leads to complete rebound
D. Díaz, A. G. Balasubramanian, K. Amini +4
When a viscoelastic shear-thinning drop of high elasticity hits a superhydrophobic surface, a growing tail-like filament vertically emerges from the impact spot as the contact line…
Optical Coherence Tomography in Soft Matter
Kasra Amini, Cornelius Wittig, Sofia Saoncella +3
Optical Coherence Tomography (OCT) has become an indispensable tool for investigating mesoscopic features in soft matter and fluid mechanics. Its ability to provide high-resolution…
Dense Suspensions in Rotary Shear
Naveen Kumar Agrawal, Zhouyang Ge, Martin Trulsson +2
We introduce a novel unsteady shear protocol, which we name Rotary Shear (RS), where the flow and vorticity directions are continuously rotated around the velocity gradient directi…
Bursting bubble in an elasto-viscoplastic medium
A. G. Balasubramanian, V. Sanjay, M. Jalaal +2
A gas bubble sitting at a liquid-gas interface can burst following the rupture of the thin liquid film separating it from the ambient, owing to the large surface energy of the resu…
Prediction of flow and elastic stresses in a viscoelastic turbulent channel flow using convolutional neural networks
Arivazhagan G. Balasubramanian, Ricardo Vinuesa, Outi Tammisola
Neural-network models have been employed to predict the instantaneous flow close to the wall in a viscoelastic turbulent channel flow. Numerical simulation data at the wall is util…
The effect of contact angle hysteresis on a droplet in a viscoelastic two-phase system
Kazem Bazesefidpar, Outi Tammisola
We investigate the dynamic behaviour of a two-dimensional (2D) droplet adhering to a wall in Poiseuille flow at low Reynolds numbers, in a system where either the droplet is viscoe…
General hydrodynamic features of elastoviscoplastic fluid flows through randomised porous media
Saeed Parvar, Emad Chaparian, Outi Tammisola
A numerical study of yield-stress fluids flowing in porous media is presented. The porous media is randomly constructed by non-overlapping mono-dispersed circular obstacles. Two cl…
Elastoviscoplastic fluid flow past a circular cylinder
S. Parvar, K. T. Iqbal, M. N. Ardekani +2
The combined effect of fluid elasticity and yield-stress on the flow past a circular cylinder is studied by two-dimensional direct numerical simulation. We analyze the effects of y…
Experimental Investigation on Particle-Laden Flows of Viscoelastic Fluids in Micro-Channels Using Optical Coherence Tomography
Kasra Amini, Gustaf Martensson, Outi Tammisola +1
Considering the nonlinear response of non-Newtonian fluids to the local shear exerted on the bulks of fluid, the initially quasi-uniform distribution of the particles might be subj…
The role of wetting on the flow of two immiscible fluids in porous media
Armin Shahmardi, Salar Zamani Salimi, Outi Tammisola +2
We study the role of the capillary number, and of the surface wettability on the dynamics of the interface between an invading and a defending phase in a porous medium by mean…
Rapid wetting of shear-thinning fluids
Susumu Yada, Kazem Bazesefidpar, Outi Tammisola +2
Using experiments and numerical simulations, we investigate the spontaneous spreading of droplets of aqueous glycerol (Newtonian) and aqueous polymer (shear-thinning) solutions on…
Experimental and numerical investigation of bubble migration in shear flow: deformability-driven chaining and repulsion
Blandine Feneuil, Kazi Tassawar Iqbal, Atle Jensen +3
We study the interaction-induced migration of bubbles in shear flow and observe that bubbles suspended in elastoviscoplastic emulsions organise into chains aligned in the flow dire…
Numerical simulation of the coalescence-induced polymeric droplet jumping on superhydrophobic surfaces
Kazem Bazesefidpar, Luca Brandt, Outi Tammisola
Self-propelled jumping of two polymeric droplets on superhydrophobic surfaces is investigated by three-dimensional direct numerical simulations. Two identical droplets of a viscoel…
A dual resolution phase-field solver for wetting of viscoelastic droplets
Kazem Bazesefidpar, Luca Brandt, Outi Tammisola
We present a new and efficient phase-field solver for viscoelastic fluids with moving contact line based on a dual-resolution strategy. The interface between two immiscible fluids…
Dynamics of an elastoviscoplastic droplet in a Newtonian medium under shear flow
Daulet Izbassarov, Outi Tammisola
The dynamics of a single elastoviscoplastic (EVP) drop immersed in plane shear flow of a Newtonian fluid is studied by 3D direct numerical simulations using a finite-difference and…
Polymer drag reduction in surfactant-contaminated turbulent bubbly channel flows
Daulet Izbassarov, Zaheer Ahmed, Pedro Costa +3
Polymer additives are commonly utilized to manipulate bubbly flows in various applications. Here, we investigate the effects of clean and contaminated bubbles driven upwards (upflo…
Turbulent bubbly channel flows: Effects of soluble surfactant and viscoelasticity
Zaheer Ahmed, Daulet Izbassarov, Pedro Costa +2
Interface-resolved direct numerical simulations are performed to examine the combined effects of soluble surfactant and viscoelasticity on the structure of a bubbly turbulent chann…