Fei, L;
Scagliarini, A;
Montessori, A;
Lauricella, M;
Succi, S;
Luo, K;
(2018)
Mesoscopic model for soft flowing systems with tunable viscosity ratio.
Physical Review Fluids
, 3
(10)
, Article 104304. 10.1103/PhysRevFluids.3.104304.
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Abstract
We propose a mesoscopic model of binary fluid mixtures with tunable viscosity ratio based on a two-range pseudopotential lattice Boltzmann method, for the simulation of soft flowing systems. In addition to the short-range repulsive interaction between species in the classical single-range model, a competing mechanism between the short-range attractive and midrange repulsive interactions is imposed within each species. Besides extending the range of attainable surface tension as compared with the single-range model, the proposed scheme is also shown to achieve a positive disjoining pressure, independently of the viscosity ratio. The latter property is crucial for many microfluidic applications involving a collection of disperse droplets with a different viscosity from that of the continuum phase. As a preliminary application, the relative effective viscosity of a pressure-driven emulsion in a planar channel is computed.
| Type: | Article |
|---|---|
| Title: | Mesoscopic model for soft flowing systems with tunable viscosity ratio |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevFluids.3.104304 |
| Publisher version: | https://doi.org/10.1103/PhysRevFluids.3.104304 |
| Language: | English |
| Additional information: | This is the published version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10061938 |
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