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Finite Element Modelling of a Cellular Electric Microenvironment
Published on: May 18, 2021
Capillary filling with pseudo-potential binary Lattice-Boltzmann model.
1Istituto per le Applicazioni del Calcolo CNR, Viale del Policlinico 137, 00161 Roma, Italy. chibbaro@iac.rm.cnr.it
The European Physical Journal. E, Soft Matter
|February 21, 2009
Summary
This study investigates capillary filling in binary fluids using a lattice Boltzmann model. Results confirm Washburn
Area of Science:
- Fluid dynamics
- Interfacial phenomena
- Computational physics
Background:
- Capillary filling is crucial in microfluidics and porous media.
- Understanding binary fluid behavior at interfaces is complex.
- Existing models require validation for specific wetting conditions.
Purpose of the Study:
- To systematically study capillary filling of binary fluids.
- To analyze methods for imposing contact angles in simulations.
- To validate theoretical laws with numerical simulations.
Main Methods:
- Mesoscopic lattice Boltzmann model for immiscible fluids.
- Simulation of diffusive interface dynamics.
- Analysis of contact angle phenomena, including complete wetting.
Main Results:
- Numerical results quantitatively agree with Washburn's law when fluid viscosity ratios are accurate.
- The study validates the use of lattice Boltzmann methods for capillary filling.
- Precursor films were observed to advance with a square-root law.
Conclusions:
- The lattice Boltzmann model accurately captures binary fluid capillary filling.
- Washburn's law is applicable under specific viscosity conditions.
- Precursor film dynamics differ from bulk interface behavior.
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