• The role of the particle aspect ratio in the discharge of a narrow silo 

  Pongó, T.; Fan, B.; Hernández-Delfin, D.; Török, J.; Stannarius, R.; Hidalgo, R. C.; Börzsönyi, T. (2022-10-01)

  The time evolution of silo discharge is investigated for different granular materials made of spherical or elongated grains in laboratory experiments and with discrete element model (DEM) calculations. For spherical grains, ...

• The complex viscosity of Möbius macromolecules 

  Piette, J. H.; Moreno, N.; Fried, E.; Giacomin, A. J. (2020-09-01)

  Using general rigid bead-rod theory, we explore the effect of twisting a macromolecule on its rheological properties in suspensions. We thus focus on macromolecules having the form of Möbius bands so that the number of ...

• 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 ...

• 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 ...

• 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 ...

• 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 ...

• 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, ...

• A numerical method for suspensions of articulated bodies in viscous flows 

  Balboa, F.; Delmotte, B. (2022-09-01)

  An articulated body is defined as a finite number of rigid bodies connected by a set of arbitrary constraints that limit the relative motion between pairs of bodies. Such a general definition encompasses a wide variety of ...

• Technology-Agnostic Assessment of Wave Energy System Capabilities 

  Ruiz‐minguela, P.; Blanco, J.M.; Nava, V.; Jeffrey, H.F. (2022-04-01)

  Developing new wave energy technologies is risky, costly and time-consuming. The large diversity of concepts, components and evaluation criteria creates a vast design space of potentially feasible solutions. This paper ...

• Experimental investigation of anomalous molecular probe diffusion in entangled polymer melts 

  Nieto, D.; Ramakrishnan, V.; Smoukov, S. K.; Venerus, D. C. (2022-01-01)

  Investigations on the diffusion of small molecules or particles in polymeric materials are important to numerous technologies and can also be used to gain insight on polymer chain dynamics. Systems where the probe size is ...

• 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 ...

• 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, ...

• 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 ...

• Self-diffusion of spherocylindrical particles flowing under non-uniform shear rate 

  Hernández-Delfin, D.; Weinhart, T.; Hidalgo, R. C. (2022-04-07)

  This work is devoted to study numerically the self-diffusion of spherocylindrical particles flowing down an inclined plane, using the discrete element method (DEM). This system is challenging due to particles being ...

• 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 ...

• Time-adaptive Adomian decomposition-based numerical scheme for Euler equations 

  Garcia, I.; Remaki, L. (2022-04-21)

  Time efficiency is one of the more critical concerns in computational fluid dynamics simulations of industrial applications. Extensive research has been conducted to improve the underlying numerical schemes to achieve time ...

• Numerical Approaches for Loads and Motions Assessment of Floating WECs Moored by Means of Catenary Mooring Systems 

  Touzon, I.; Petuya, V.; Nava, V.; Alonso-Reig, M.; Mendikoa, I. (2022)

  Technologies for harvesting offshore renewable energy based on float- ing platforms, such as offshore wind, wave and tidal energies, are currently being developed with the purpose of achieving a competitive cost of energy. ...

• Motile dislocations knead odd crystals into whorls 

  Bililign, E. S.; Balboa, F.; Ganan, Y. A.; Poncet, A.; Soni, V.; Magkiriadou, S.; Shelley, M.J.; Bartolo, D.; Irvine, W.T.M. (2021-01-01)

  The competition between thermal fluctuations and potential forces governs the stability of matter in equilibrium, in particular the proliferation and annihilation of topological defects. However, driving matter out of ...

• 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 ...

• Thermal conductivity of amorphous polymers and its dependence on molecular weight 

  Kiessling, A.; Nieto, D.; Vogiatzis, G.G.; Venerus, D. C. (2021-07-16)

  Thermal conductivity is an important transport property governing the performance of polymers in non-isothermal conditions. Nevertheless, its dependence on molecular weight M has not been the subject of as much attention ...

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