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+34 946 567 842
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+34 946 567 842
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vnava@bcamath.org
Information of interest
- Orcid: 0000-0002-3207-3517
BCAM Researcher at BCAM and TECNALIA - Offshore Renewable Energy Group
Scientific Interests:
- Computational stochastic mechanics and linearisation techniques
- Computational fluid dynamics
- Wave mechanics of ocean waves
- Short term and long term statistics of ocean waves
- Propagation models of ocean waves
- Hydrodynamics of floating bodies
- Systems for harnessing of energy from ocean waves
- Offshore floating and fixed systems for wind energy.
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A methodology for expert knowledge imbrication in mooring system design using Bayesian based optimization
Aristondo, A.; Abanda, A.
; Esteras, M.; Nava, V.; Penalba, M. (2025)
Mooring system design optimisation is a complex problem requiring a specific technical expertise. Because of the large number of parameters influencing the design and their related uncertainty, efficient design methodologies ...
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Development and Validation of a Health-aware Floating Offshore Wind Farm Simulation Platform: FOWLTY
Peña-Sanchez, Y.; Penalba, M.; Knudsen, T.; Nava, V.; Pardo, D. (2024-12)
Offshore wind energy is now an important game player towards the achievement of United Nations’ Sustainable Goals 7 (clean and affordable energy) and 13 (climate change) due to its huge potential but, given the harsh ...
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Targeting the high frequency tail of wave spectra for energy harvesting in marine sensor networks
Davidson, J.P.; Nava, V. (2024-12)
While the conventional philosophy of wave energy conversion is to target the large amounts of power in the peak of the input wave spectrum, this study proposes that for the application of powering marine sensor networks ...
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Gaussian Mixture autoencoder for uncertainty-aware damage identification in a Floating Offshore Wind Turbine
Fernandez-Navamuel, A.; Gorostidi, N.; Pardo, D.; Nava, V.; Chatzi, E. (2024-11)
This work proposes an uncertainty-aware approach to the inverse problem of damage identification in a Floating Offshore Wind Turbine (FOWT). We design an autoencoder architecture, where the latent space represents the ...
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Fault detection and identification for control systems in floating offshore wind farms: A supervised Deep Learning methodology
Fernandez-Navamuel, A.; Peña-Sanchez, Y.; Nava, V. (2024-10-15)
This study employs a data-driven Fault Detection and Isolation (FDI) methodology in Floating Offshore Wind Turbine (FOWT) farms. The main objective of the work lies in classifying faults impacting the components of the ...
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Reducing spatial discretization error on coarse CFD simulations using an openFOAM-embedded deep learning framework
Gonzalez-Sieiro, J.; Pardo, D.; Nava, V.; Calo, V.M.; Towara, M. (2024-09-09)
We propose a method for reducing the spatial discretization error of coarse computational fluid dynamics (CFD) problems by enhancing the quality of low-resolution simulations using deep learning. We feed the model with ...
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Revisiting excitation force estimation in WECs: On the (mis)use of structure-based estimation approaches
Faedo, N; García-Violini, D.; Peña-Sanchez, Y.; Nava, V.; Ringwood, J.V. (2024-08-03)
Wave excitation force (torque) estimators, vital in wave energy systems, generally combine the nominal representation of a wave energy converter (WEC) with an excitation force (perturbation) model. Thus, this model-based ...
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Condition monitoring of mooring systems for Floating Offshore Wind Turbines using Convolutional Neural Network framework coupled with Autoregressive coefficients
Sharma, S.; Nava, V. (2024-06-15)
This research presents a novel approach proposed for the monitoring of mooring systems in Floating Offshore Wind Turbines (FOWTs), employing a combination of Convolutional Neural Networks (CNNs) and Auto-Regressive (AR) ...
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Control co-design for wave energy farms: Optimisation of array layout and mooring configuration in a realistic wave climate
Peña-Sanchez, Y.; García-Violini, D.; Penalba, M.; Zarketa, A.; Ferri, F.; Nava, V.; Ringwood, J.V. (2024-06-01)
This paper presents a novel Control Co-Design (CCD) methodology aimed at economically optimising the layout of wave energy converter (WEC) arrays. CCD ensures the synergy of optimised WEC and array parameters with the final ...
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Monitoring Mooring Lines of Floating Offshore Wind Turbines: Autoregressive Coefficients and Stacked Auto-Associative-Deep Neural Networks
Sharma, S.; Nava, V. (2024)
This study introduces a pioneering monitoring system designed to mitigate operational costs and enhance the sustainability of Floating Offshore Wind Turbines (FOWT). The proposed framework combines Autoregressive models ...
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Diagnosis of the health status of mooring systems for floating offshore wind turbines using autoencoders
Gorostidi, N.; Pardo, D.; Nava, V. (2023-11-01)
Floating offshore wind turbines (FOWTs) show promise in terms of energy production, availability, and sustainability, but remain unprofitable due to high maintenance costs. This work proposes a deep learning algorithm to ...
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On building physics-based AI models for the design and SHM of mooring systems
Nava, V.; Aristondo, A.; Varo, V.; Esteras, M.; Touzon, I.; Boto, F.; Mendikoa, I.; Ruiz-Minguela, P.; Gil-Lopez, S.; Gorostidi, N.; Pardo, D. (2023-01-01)
Expert systems in industrial processes are modelled using physics-based approaches, data-driven models or hybrid approaches in which however the underlying physical models generally constitute a separate block with respect ...
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Faulty wind farm simulation: An estimation/control-oriented model
Peña-Sanchez, Y.; Penalba, M.; Nava, V. (2023-01-01)
A large percentage of the electricity generation cost of wind turbines (WTs) is related to the operation and maintenance of the WTs. To reduce such costs, fault detection and isolation (FDI) and fault tolerant control (FTC) ...
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MONITORING MOORING (MONIMOOR) LINES OF FLOATING STRUCTURES USING DEEP LEARNING-BASED APPROACHES
Sharma, S.; Nava, V.; Gorostidi, N. (2023)
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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 ...
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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. ...
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Predictive Maintenance of Floating Offshore Wind Turbine Mooring Lines using Deep Neural Networks
Gorostidi, N.; Nava, V.; Aristondo, A.; Pardo, D. (2022)
The recent massive deployment of onshore wind farms has caused controversy to arise mainly around the issues of land occupation, noise and visual pollution and impact on wildlife. Fixed offshore turbines, albeit beneficial ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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. ...
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Finite Element Simulations of Two-phase Flow and Floating Bodies Using FEniCS-HPC
Moragues, M.; Castanon, D.; Degirmenci, N.C.; Jansson, J.; Nava, V.; Krishnasamy, E.; Hoffman, J. (2018-07)
We present a variational multiscale stabilized finite element method to solve the variable density incompressible Navier-Stokes equations for the simulation of two-phase flow. We introduce a level-set method based on the ...
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On intermediate-scale open-sea experiments on floating offshore structures: Feasibility and application on a spar support for offshore wind turbines
Ruzzo, C.; Fiamma, V.; Collu, M.; Failla, G.; Nava, V.; Arena, F. (2018-06-28)
Experimental investigation of floating structures represents the most direct way for achieving their dynamic identification and it is particularly valuable for relatively new concepts, such as floating supports for offshore ...
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Layout Optimisation of Wave Energy Converter Arrays
Mercadé Ruiz, P.; Nava, V.; Topper, M.B.R.; Ruiz Minguela, P.; Ferri, F.; Kofoed, J.P. (2017-08-24)
This paper proposes an optimisation strategy for the layout design of wave energy converter (WEC) arrays. Optimal layouts are sought so as to maximise the absorbed power given a minimum q-factor, the minimum distance between ...
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A numerical study on the hydrodynamic impact of device slenderness and array size in wave energy farms in realistic wave climates
Penalba, M.; Touzon, I.; Lopez-Mendia, J.; Nava, V. (2017-07-10)
The future of wave energy converters lies in the design and realization of farms comprising of several devices, given the level of actual power flow for the individual devices and because of several operational issues. ...
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Simulation of the HarshLab floating platform for offshore experimentation using FEniCS-HPC
Moragues, M.; Castanon, D.; Jansson, J.; Nava, V.; Krishnasamy, E.; Degirmenci, N.C.; Nguyen, V.D.; Garrido, C.; Sanchez, M.; Rodriguez-Arias, R. (2017)
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Numerical investigation of the aerodynamic performance for a wells-type turbine in a wave energy converter
Stipcich, G.; Ramezani, A.; Nava, V.; Touzon, I.; Sanchez-Lara, M.; Remaki, L. (2015-12-31)
Ocean waves constitute an extensive energy resource, whose extraction has been the subject of intense research activity in the last three decades. Among the different variants of Wave Energy Converters, the principle of ...
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Adaptive simulation of unsteady flow past the submerged part of a floating wind turbine platform
Jansson, J.; Nava, V.; Sanchez, M.; Aguirre, G.; de Abreu, R.V.; Hoffman, J.; Villate, J.L. (2015-12-31)
Offshore floating platforms for wind turbines represent challenging concepts for designers trying to combine an optimal compromise between cost effectiveness and performance. Modelling of the hydrodynamic behaviour of the ...
