84 citations · 450 across the 29 of their papers we have counts for
29 papers
Contact-angle hysteresis provides resistance to drainage of liquid-infused surfaces in turbulent flows
Sofia Saoncella, Si Suo, Johan Sundin +5
Lubricated textured surfaces immersed in liquid flows offer tremendous potential for reducing fluid drag, enhancing heat and mass transfer, and preventing fouling. According to cur…
Dewetting of a corner film wrapping a wall-mounted cylinder
Si Suo, Seyed Morteza Habibi Khorasani, Shervin Bagheri
In this study, we investigate the stability of a liquid film that partially wets a corner between a cylinder and a substrate, using a combination of theoretical and numerical appro…
Prediction of equivalent sand-grain size and identification of drag-relevant scales of roughness -- a data driven approach
Jiasheng Yang, Alexander Stroh, Sangseung Lee +3
The purpose of the present work is to examine two possibilities; firstly, predicting equivalent sand-grain roughness size based on the roughness height probability density fu…
Turbulent flows over porous lattices: alteration of near-wall turbulence and pore-flow amplitude modulation
Seyed Morteza Habibi Khorasani, Mitul Luhar, Shervin Bagheri
Turbulent flows over porous lattices consisting of rectangular cuboid pores are investigated using scale-resolving direct numerical simulations. Beyond a certain threshold which is…
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…
Shear-induced droplet mobility within porous surfaces
Si Suo, Haibo Zhao, Shervin Bagheri +2
Droplet mobility under shear flows is important in a wide range of engineering applications, e.g., fog collection, and self-cleaning surfaces. For structured surfaces to achieve su…
Droplet impact on asymmetric hydrophobic microstructures
Susumu Yada, Ugis Lacis, Wouter van der Wijngaart +3
Textured hydrophobic surfaces that repel liquid droplets unidirectionally are found in nature such as butterfly wings and ryegrass leaves and are also essential in technological pr…
Slip of submerged two-dimensional liquid-infused surfaces in the presence of surfactants
Johan Sundin, Shervin Bagheri
Using numerical simulations, we investigate the effects of Marangoni stresses induced by surfactants on the effective slip length of liquid-infused surfaces (LIS) with transverse g…
Heat transfer increase by convection in liquid-infused surfaces for laminar and turbulent flows
Johan Sundin, Umberto Ciri, Stefano Leonardi +2
Liquid-infused surfaces (LIS) can reduce friction drag in both laminar and turbulent flows. However, the heat transfer properties of such multi-phase surfaces have still not been i…
Nanoscale sheared droplet: Volume-of-Fluid, phase-field and no-slip molecular dynamics
Uǧis Lācis, Michele Pellegrino, Johan Sundin +4
The motion of the three-phase contact line between two immiscible fluids and a solid surface arises in a variety of wetting phenomena and technological applications. One challenge…
Predicting drag on rough surfaces by transfer learning of empirical correlations
Sangseung Lee, Jiasheng Yang, Pourya Forooghi +2
Recent developments in neural networks have shown the potential of estimating drag on irregular rough surfaces. Nevertheless, the difficulty of obtaining a large high-fidelity data…
Near-wall turbulence alteration with the Transpiration-Resistance Model
Seyed Morteza Habibi Khorasani, Uǧis Lācis, Simon Pasche +2
A set of boundary conditions called the Transpiration-Resistance Model (TRM) are investigated in altering near-wall turbulence. The TRM has been previously proposed by \citet{Lacis…
Roughness on liquid-infused surfaces induced by capillary waves
Johan Sundin, Stéphane Zaleski, Shervin Bagheri
Liquid-infused surfaces (LIS) are a promising technique for reducing friction, fouling and icing in both laminar and turbulent flows. Previous work has demonstrated that these surf…
Droplet impact on surfaces with asymmetric microscopic features
Susumu Yada, Blandine Allais, Wouter van der Wijngaart +3
The impact of liquid drops on a rigid surface is central in cleaning, cooling and coating processes in both nature and industrial applications. However, it is not clear how details…
Steady moving contact line of water over a no-slip substrate
Uǧis Lācis, Petter Johansson, Tomas Fullana +4
The movement of the triple contact line plays a crucial role in many applications such as ink-jet printing, liquid coating and drainage (imbibition) in porous media. To design accu…
Lift induced by slip inhomogeneities in lubricated contacts
Aidan Rinehart, Uǧis L{ā}cis, Thomas Salez +1
Lubrication forces depend to a high degree on elasticity, texture, charge, chemistry, and temperature of the interacting surfaces. Therefore, by appropriately designing surface pro…
Droplet leaping governs microstructured surface wetting
Susumu Yada, Shervin Bagheri, Jonas Hansson +4
Microstructured surfaces that control the direction of liquid transport are not only ubiquitous in nature, but they are also central to technological processes such as fog/water ha…
Higher order homogenized boundary conditions for flows over rough and porous surfaces
Y. Sudhakar, Ugis Lacis, Simon Pasche +1
We derive a homogenized macroscopic model for fluid flows over ordered homogeneous porous surfaces. The unconfined free-flow is described by the Navier-Stokes equation, and the Dar…
Modal Analysis of Fluid Flows: Applications and Outlook
Kunihiko Taira, Maziar S. Hemati, Steven L. Brunton +5
We present applications of modal analysis techniques to study, model, and control canonical aerodynamic flows. To illustrate how modal analysis techniques can provide physical insi…
Interaction between hairy surfaces and turbulence for different surface time scales
Johan Sundin, Shervin Bagheri
Surfaces with filamentous structures are ubiquitous in nature on many different scales, ranging from forests to micrometer-sized cilia in organs. Hairy surfaces are elastic and por…
Edge state modulation by mean viscosity gradients
Enrico Rinaldi, Philipp Schlatter, Shervin Bagheri
Motivated by the relevance of edge state solutions as mediators of transition, we use direct numerical simulations to study the effect of spatially non-uniform viscosity on their e…
A computational continuum model of poroelastic beds
Uǧis Lācis, Giuseppe Antonio Zampogna, Shervin Bagheri
Despite the ubiquity of fluid flows interacting with porous and elastic materials, we lack a validated non-empirical macroscale method for characterizing the flow over and through…
Passive control of a falling sphere by elliptic-shaped appendages
Uǧis Lācis, Stefano Olivieri, Andrea Mazzino +1
The majority of investigations characterizing the motion of single or multiple particles in fluid flows consider canonical body shapes, such as spheres, cylinders, discs, etc. Howe…
A framework for computing effective boundary conditions at the interface between free fluid and a porous medium
Uǧis Lācis, Shervin Bagheri
Interfacial boundary conditions determined from empirical or ad-hoc models remain the standard approach to model fluid flows over porous media, even in situations where the topolog…