• 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 ...

• A comparison of numerical approaches for the design of mooring systems for wave energy converters 

  Touzon, I.; Nava, V.; de Miguel, B.; Petuya, V. (2020-07-01)

  This paper analyses the numerical outcome of applying three different well-known mooring design approaches to a floating wave energy converter, moored by means of four catenary lines. The approaches include: a linearized ...

• Review of systems engineering (Se) methods and their application to wave energy technology development 

  Ruiz‐minguela, P.; Nava, V.; Hodges, J.; Blanco, J.M. (2020-10-01)

  The design of effective and economically viable wave energy devices involves complex decision‐making about the product based on conceptual design information, including stakeholder requirements, functions, components and ...

• Small scale experimental validation of a numerical model of the HarshLab2.0 floating platform coupled with a non-linear lumped mass catenary mooring system 

  Touzon, I.; Nava, V.; Gao, Z.; Mendikoa, I.; Petuya, V. (2020-03-15)

  When focusing on mooring system numerical modelling, the efforts are focused on validating models that increase the accuracy and maintain the computation time under reasonable limits. In this paper an approach for modelling ...

• Frequency domain modelling of a coupled system of floating structure and mooring Lines: An application to a wave energy converter 

  Touzon, I.; Nava, V.; Gao, Z.; Petuya, V. (2021-01-15)

  Floating structures for single offshore renewable energy devices, i.e. wave energy converters, tend to be significantly smaller than those of the traditional offshore industry and the interaction between floater motions ...

• Metallic microswimmers driven up the wall by gravity 

  Brosseau, Quentin; Balboa, F.; Lushi, Enkeleida; Wu, Yang; Ristroph, Leif; Ward, Michael D.; Shelley, Michael J.; Zhang, Jun (2021-07-21)

  Experiments on autophoretic bimetallic nanorods propelling within a fuel of hydrogen peroxide show that tail-heavy swimmers preferentially orient upwards and ascend along inclined planes. We show that such gravitaxis is ...

• 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 ...

• 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 ...

• Molecular Dynamics Test of the Stress-Thermal Rule in Polyethylene and Polystyrene Entangled Melts 

  Nieto, D.; Sgouros, A.P.; Vogiatzis, G.G.; Tzoumanekas, C.; Georgilas, V.; Verbeeten, W.M.H.; Theodorou, D.N. (2020-02-03)

  Anisotropic thermal transport induced by deformation and the linear relation between the thermal conductivity and stress tensors, also known as the stress-thermal rule (STR), are tested via molecular dynamics simulations ...

• 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 ...

• Hydrodynamic identification of NAUTILUS FOWT platform from small scale tests 

  Galván, J.; Sánchez-Lara, M.; Garrido-Mendoza, C.; Pérez-Morán, G.; Boulluec, M.L.; Augier, B.; Rodriguez-Arias, R.; Nava, V. (2019)

  A small-scale tank test campaign of the NAUTILUS offshore wind floating semisub-mersible platform was held at the Ifremer Deep Water Basin within the framework of the MaRINET 2 project. The support structure consists in ...

• Mooring system monitoring of offshore renewable energy floating platforms 

  Touzon, I.; Garcia-Corcuera, A.; Nava, V.; Rodriguez-Arias, R.; de Miguel, B. (2019)

  An appropriate schedule of the operations for the maintenance (both long and short term) of offshore renewable energy devices can be a crucial key factor for assessing the economic viability of marine energy projects. ...

• 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 ...

• 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 ...

• Reducing variability in the cost of energy of ocean energy arrays 

  Topper, M.B.R.; Nava, V.; Collin, A.J.; Bould, D.; Ferri, F.; Olson, S.S.; Dallmann, A.R.; Roberts, J.D.; Ruiz Minguela, P.; Jeffrey, H.F. (2019-09)

  Variability in the predicted cost of energy of an ocean energy converter array is more substantial than for other forms of energy generation, due to the combined stochastic action of weather conditions and failures. If the ...

• 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 ...

• 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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