475 citations · 1k across the 12 of their papers we have counts for
12 papers
A Viscoelastic Catastrophe
Kristian Ejlebjerg Jensen, Peter Szabo, Fridolin Okkels
We use a differential constitutive equation to model the flow of a viscoelastic flow in a cross-slot geometry, which is known to exhibit bistability above a critical flow rate. The…
Implementation of the Log-Conformation Formulation for Two-Dimensional Viscoelastic Flow
K. E. Jensen, P. Szabo, F. Okkels
We have implemented the log-conformation method for two-dimensional viscoelastic flow in COMSOL, a commercial high-level finite element package. The code is verified for an Oldroyd…
Topology optimization of robust superhydrophobic surfaces
A. Cavalli, P. Bøggild, F. Okkels
In this paper we apply topology optimization to micro-structured superhydrophobic surfaces for the first time. It has been experimentally observed that a droplet suspended on a bru…
Optimal homogenization of perfusion flows in microfluidic bio-reactors; a numerical study
Fridolin Okkels, Martin Dufva, Henrik Bruus
To ensure homogeneous conditions within the complete area of perfused microfluidic bio-reactors, we develop a general design of a continuously feed bio-reactor with uniform perfusi…
Mass and charge transport in micro and nano-fluidic channels
N. A. Mortensen, L. H. Olesen, F. Okkels +1
We consider laminar flow of incompressible electrolytes in long, straight channels driven by pressure and electro-osmosis. We use a Hilbert space eigenfunction expansion to address…
Scaling behavior of optimally structured catalytic microfluidic reactors
Fridolin Okkels, Henrik Bruus
In this study of catalytic microfluidic reactors we show that, when optimally structured, these reactors share underlying scaling properties. The scaling is predicted theoretically…