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+34 946 567 842
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+34 946 567 843
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mellero@bcamath.org
Information of interest
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Apparent slip mechanism between two spheres based on solvent rheology: Theory and implication for the shear thinning of non-Brownian suspensions
Vazquez-Quesada, A.; Español, P.; Ellero, M.
(2018-12-10)
Analytical results for the apparent slip between two spheres in a simple biviscous model of a shear thinning fluid are presented. Velocity profiles and apparent slip lengths along the surfaces are analyzed in order to ...
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Arbitrary flow boundary conditions in smoothed dissipative particle dynamics: A generalized virtual rheometer
Moreno, N.; Ellero, M. (2021-01-01)
In this work, a methodology to perform rheological studies on smoothed dissipative particle dynamics under arbitrary flow configurations is introduced. To evaluate the accuracy and flexibility of the proposed methodology, ...
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A conservative lubrication dynamics method for the simulation of dense non-colloidal suspensions with particle spin
Kumar, S.S.P.; Vazquez-Quesada, A.; Ellero, M. (2021-02-15)
In this paper, a novel Fast Lubrication Dynamics method that can efficiently simulate dense non-colloidal suspensions is proposed. To reduce the computational cost in the presented methodology, interparticle lubrication-based ...
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Dynamics and rheology of a suspension of super-paramagnetic chains under the combined effect of a shear flow and a rotating magnetic field
Rossi, E.; Ruiz-Lopez, J.A.; Vazquez-Quesada, A.; Ellero, M. (2021)
This study presents an analysis of the dynamics of a single and multiple chains of spherical super-paramagnetic beads suspended in a Newtonian fluid under the combined effect of an external rotating magnetic field and a ...
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Hydrodynamics of spike proteins dictate a transport-affinity competition for SARS-CoV-2 and other enveloped viruses
Moreno, N.; Moreno-Chaparro, D.; Balboa, F.; Ellero, M. (2022-12-01)
Many viruses, such as SARS-CoV-2 or Influenza, possess envelopes decorated with surface proteins (a.k.a. spikes). Depending on the virus type, a large variability is present in the surface-proteins number, morphology and ...
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Limited Visual Range in the Social Force Model: Effects on Macroscopic and Microscopic Dynamics
García, A.; Hernández-Delfin, D.; Lee, D.-J.; Ellero, M. (2023-01-15)
The Social Force Model has been widely used to simulate pedestrian dynamics. Its simplicity and ability to reproduce some collective patterns of behavior make it an adequate tool in the field of pedestrian dynamics. However, ...
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Mesoscopic modelling and simulation of espresso coffee extraction
Ellero, M.; Navarini, L. (2019)
A mesoscopic model for the simulation of espresso extraction based on the Smoothed Particle Hydrodynamics method is presented. The model incorporates some essential features such as bimodal granulometry (fines-coarses) of ...
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Mesoscopic simulations of inertial drag enhancement and polymer migration in viscoelastic solutions flowing around a confined array of cylinders
Nieto, D.; Ellero, M. (2022-07-01)
We study the flow around a periodic array of cylinders using a mesoscopic viscoelastic fluid that mimics polymeric solutions. We model our fluid employing a novel mesoscopic method based on Smoothed Dissipative Particle ...
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Mesoscopic simulations of inertial drag enhancement and polymer migration in viscoelastic solutions flowing around a confined array of cylinders
Nieto, D.; Ellero, M. (2022-07-01)
We study the flow around a periodic array of cylinders using a mesoscopic viscoelastic fluid that mimics polymeric solutions. We model our fluid employing a novel mesoscopic method based on Smoothed Dissipative Particle ...
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Modeling swelling effects during coffee extraction with smoothed particle hydrodynamics
Mo, C.; Navarini, F.; Ellero, M.; Liverani, F.S. (2022-04-01)
It is commonly assumed that coffee particles swell during filtration, but it has not been clarified how different degrees of swelling affect the extraction. In this article, we propose a grain swelling model to investigate ...
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Modeling the effect of flow-induced mechanical erosion during coffee filtration
Chaojie, M.; Johnston, R.; Navarini, L.; Ellero, M. (2021-09)
The espresso extraction process involves a complex transport inside a geometry-changing porous medium. Large solid grains forming the majority of the porous medium can migrate, swell, consolidate and they can also ...
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Non-affine motion and selection of slip coefficient in constitutive modeling of polymeric solutions using a mixed derivative
Nieto, D.; Español, P.; Ellero, M. (2023-01-01)
Constitutive models for the dynamics of polymer solutions traditionally rely on closure relations for the extra stress or related microstructural variables (e.g., conformation tensor) linking them to flow history. In this ...
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Normal lubrication force between spherical particles immersed in a shear-thickening fluid
Vazquez-Quesada, A.; Wagner, N.J.; Ellero, M. (2018-12-07)
In this work, the inverse bi-viscous model [Physics of Fluids 29, 103104 (2017)] is used to describe a shear-thickening fluid. An analytical velocity profile in a planar Poiseuille flow is utilized to calculate an approximate ...
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Numerical investigation of the rheological behavior of a dense particle suspension in a biviscous matrix using a lubrication dynamics method
Kumar, S.S.P.; Vazquez-Quesada, A.; Ellero, M. (2020-05-19)
This paper presents a numerical approach to predict the rheology of dense non-colloidal suspensions with a biviscous matrix. A biviscous matrix is characterized as a fluid with two shear rate dependent viscosities i.e. one ...
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Shear-thickening of a non-colloidal suspension with a viscoelastic matrix
Vazquez-Quesada, A.; Español, P.; Tanner, R.I.; Ellero, M. (2019)
In this work we study the rheology of a non-colloidal suspension of rigid spherical particles interacting with a viscoelastic matrix. Three-dimensional numerical simulations under shear flow are performed using the ...
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SPH simulations of thixo-viscoplastic fluid flow past a cylinder
Rossi, E.; Garcia de Beristain, I.; Vazquez-Quesada, A.; López-Aguilar, J. E.; Ellero, M. (2022-10-01)
Thixotropic materials are complex fluids that display time-dependent viscosity and/or yield-stress response upon the application of a fixed deformation, while recovering their original structured-state when the deformation ...
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Tribological variable-friction coefficient models for the simulation of dense suspensions of rough polydisperse particles
Ruiz-Lopez, J.A.; Prasanna Kumar, S. S.; Vazquez-Quesada, A.; De Vicente, J.; Ellero, M. (2023-03-01)
The rheology of concentrated suspensions of particles is complex and typically exhibits a shear-thickening behavior in the case of repulsive interactions. Despite the recent interest arisen, the causes of the shear-thickening ...