Javier L. Lara

Javier L. Lara
Universidad de Cantabria | UNICAN · Environmental Hydraulics Institute "IH Cantabria"

PhD Civil Engineering

About

168
Publications
48,930
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
4,744
Citations
Introduction
Dr. Javier Lopez Lara is currently the Head of the Coastal Hydrodynamics and Infrastructure Group at IHCantabria. In 1998, he graduated in Civil Engineer with Major in Structures and, in 2002 he got his Ph.D. in Civil Engineering at University of Cantabria (Spain). His research interests are focus on numerical modelling using CFD techniques of water wave mechanics, wave-structure interaction, wave generated turbulence, surf-zone hydrodynamics and environmental flows.
Additional affiliations
January 2007 - present
Universidad de Cantabria
Position
  • Head of Coastal Hydrodynamics and Infrastructures Group
March 2005 - October 2006
Cornell University
Position
  • Research Associate

Publications

Publications (168)
Article
An accurate estimation of the historical harbour wave agitation is fundamental for many practical applications, such as port downtime analyses. In practical harbour agitation studies, usually based on numerical propagations from offshore wave climate towards a harbour (wave downscaling), the accuracy in defining the outer wave climate has an impact...
Conference Paper
Full-text available
The aim of this work is to validate and analyze with the numerical model OpenFOAM, the nonlinear interaction of a WEC under regular waves using the Overset framework. Previous techniques, such as deforming grid approaches, present problems to handle large body motions when modelling wave-structure interactions. Therefore, by means of the Overset me...
Article
Full-text available
Spillway design is key to the effective and safe operation of dams. Typically, the flow is characterized by high velocity, high levels of turbulence, and aeration. In the last two decades, advances in computational fluid dynamics (CFD) made available several numerical tools to aid hydraulic structures engineers. The most frequent approach is to sol...
Data
This video shows the results of concentration fields produced by breaking waves simulated with the numerical model IH2VOF-SED. The top panel shows results during the first waves of the simulation, when the bathymetry is still nearly flat. The bottom panel shows the results after 24 minutes of wave action, when the bathymetry evolved forming a break...
Article
This study presents the new advances achieved in the field of harbour agitation climate assessment. Based on the improvement of an elliptic mild-slope model (MSP), which realistically reconstructs waves inside any-sized basin, represented by high-detailed unstructured meshes, and forced by real-shaped outer spectral data. A new solver is proposed f...
Article
In this work, a new numerical model for cross-shore beach profile evolution, IH2VOF-SED, is developed. It consists in the bidirectional coupling of a 2D RANS hydrodynamic solver and a sediment transport module. The resulting model is extensively validated against three benchmark cases at different scales, attending to the hydrodynamics, bottom shea...
Article
Climate change studies already reported sea level rise as an accepted scenario, which induces changes in nearshore wave conditions. A large range of new experiences including water level, run-up, overtopping, hydrodynamic data for different wave steepnesses and directions was performed in the Leibniz Universität Hannover (LUH) wave basin for a rubb...
Article
Full-text available
Air entrainment is common in free surface flows in large hydraulic structures (e.g., spillways, chutes, energy dissipation structures) and must be considered to assure an effective and safe operation. Due to the large size of the prototype structures, it is infeasible to model individual air bubbles. Therefore, using the OpenFOAM toolbox, an effici...
Article
Although mangroves reduce the daily risk of flood for millions of people, it is still difficult to estimate the protection they provide for variable wave conditions and forest characteristics. This aspect is crucial for the promotion of conservation and restoration of mangrove forests and for the estimation of how the coastal protection service the...
Presentation
Full-text available
Localized air-entrainment in hydraulic structures typically occur at geometry continuities or impinging flows. Laboratory data of an impinging jet experiment (Chanson & Manasseh, 2003) is used to evaluate and compare the performance of a volume-of-fluid and a two-phase Euler models. Both are included in the open-source OpenFOAM software toolbox (Op...
Article
Full-text available
Estimation of the flow energy dissipation induced by an ecosystem that accounts for its characteristics (i.e. biomechanical properties, morphology, density) and the incident hydrodynamic conditions is crucial if ecosystem-based coastal protection measurements want to be implemented. Characterization of a vegetated ecosystem by measuring leaf traits...
Article
Full-text available
There are coastal areas which are particularly prone to landslide-generated tsunami risk. The destructive effects caused by the impulsive waves, generated by landslide sources, can be strongly magnified by the characteristics of the so-called "confined geometries" (e.g. bays, reservoirs, lakes, volcanic islands, fjords, etc.). Complicated physical...
Article
Full-text available
This study considers the wave overtopping loads on a building behind a rubble mound breakwater using 2D numerical modelling. The building will be used as Coast Guard station in Greystones Marina, which is located on the Irish Sea. Similar studies, using physical modelling, were carried out recently by Watson et al. (2018) and Park et al. (2017). Th...
Article
Full-text available
The use of CFD for numerical representation of laboratory wave flume and basins, commonly known as numerical wave tanks (NWT), has become more popular in recent years with the aim of improving knowledge in the field of wave-structure interaction (WSI), both fixed and floating, due to advances that have been made in numerical modelling, mainly with...
Article
Dentro del diseño de cajones de hormigón para la construcción de diques verticales, se ha definido unanueva metodología para el cálculo de las solicitaciones tridimensionales y la estabilidad hidráulica asociadapara todas las fases constructivas de los mismos, basada en el modelado numérico CFD (ComputationalFluid Dynamics) tridimensional y las téc...
Article
Bridge pier scour poses major concerns for public safety and riverine communities because of its ability to undermine pier foundations. A new collar design is introduced as an improvement on the existing Flat Plate Collar (FPC). Uniquely, the three-dimensional collar is specifically designed to contain the horseshoe vortex and guide it safely downs...
Article
In this paper, an extended numerical analysis of the “confined-crest impact” (hereinafter referred as “C-CI”), induced by non-breaking waves on recurved parapet walls, is presented to better understand the physics and characteristics of this impulsive wave phenomenon, which significantly depends on the geometry of the parapet (here made by a sector...
Article
In this work, we present several applications of the 2D-3D multi-domain couplings for Navier-Stokes models developed and validated in its companion (Di Paolo et al. (0000), submitted). The methodology is used to carry out some relevant simulations which include long regular and irregular waves, solitary wave propagation on a shallow foreshore, focu...
Presentation
VIDEOS: 1) Wave overtopping for oblique waves on a vertical breakwater on a rubble-mound foundation (https://vimeo.com/456919845) 2) Regular waves interaction with a vertical breakwater on a rubble-mound foundation (https://vimeo.com/456919285) 3) Coupled mooring analysis of a semisubmersible floating offshore wind platform using the Overset framew...
Article
Port development -as key aspect of sustained economic growth- implies large investments in coastal structures, increasing the risk of structural failures and operational stoppages due to coastal hazards. Then, this paper presents a new approach to statistically characterize and simulate the long-term wave climate to be applied in port risk assessme...
Article
This paper and its companion (Di Paolo et al. (b), submitted) present near-far field coupling schemes of Navier-Stokes (NS) equations for high-fidelity numerical modelling of wave generation, transformation and interaction with structures. The computational domain is subdivided into near and far field zones (2D and 3D subdomains, respectively) in w...
Article
Full-text available
Abstract The accurate modelling of the landslide‐generated tsunami characteristics in the so‐called near‐field is crucial for many practical applications. In this paper we present a new full‐3D numerical method for modelling tsunamis generated by rigid and impermeable landslides in OpenFOAM® based on the Overset mesh technique. The approach has bee...
Presentation
Full-text available
The nonlinear interaction between waves and floating wave energy converters (WECs) has become in the recent years one of the biggest challenges for wave power industry. Large displacements of real structures demand accurate and robust numerical tools to solve the problems more efficiently. However, all this nonlinear interactions between the floati...
Article
This paper presents an innovative vertical breakwater cross-section integrating an overtopping wave energy converter, named OBREC-V, and the analysis of its hydraulic performance and stability response to hydraulic loading. The structure is composed of a vertically-faced caisson with a sloping ramp on the top, a reservoir and a set-back crown-wall....
Article
Multi-environment reactors are an innovative alternative to simplify conventional Biological Nutrient Removal (BNR) treatment trains as they are more compact and can adapt to existing quality requirements. However, maintaining the desired environmental conditions in different zones of the reactor implies the need for deflectors or mixing devices th...
Article
Full-text available
The 7th International Conference on The Application of Physical Modelling in Coastal and Port Engineering and Science, Coastlab18, was organized in Santander, Spain, from 22 to 26 May 2018, by the Instituto de Hidráulica Ambiental de la Universidad de Cantabria, IHCantabria. The conference was organized under the auspices of the International Assoc...
Conference Paper
Full-text available
SE@PORT project aims to improve the overall performance of a single Wave Energy Converter (WEC), developing hybrid systems that combine the use of two technologies over and above individual working principles. An oscillating water column (OWC) and an overtopping converter (OBREC-type in this case) have been designed to be included in Las Palmas har...
Article
AnoxAn is a novel multi-environment reactor for biological nutrient removal (BNR) from wastewater. Although its biological efficacy has been demonstrated on a pilot scale, hydrodynamics is observed to significantly affect the performance of AnoxAn. To study its complex hydraulic behaviour, a model based on Computational Fluid Dynamics 3D (CFD) is c...
Presentation
In recent years, the increase of computational resources make numerical models for studying real fluid-structure interactions very popular.Thus, strong, robust and accurate numerical tools are needed to solve problems more efficiently.Movable structures like wave energy converters (OWC) or floating offshore wind turbines (FOWT), moored ships or flo...
Conference Paper
Full-text available
Probabilistic design analysis is highlighted as a powerful tool during the design/planning phases due to its capability to simulate the hydraulic performance of coastal structures along their lifetime in a context of uncertainty. In this work, a novel methodology for applying a probabilistic approach for non-conventional breakwaters in shallow wate...
Conference Paper
The aim of the present paper is to give some preliminary guidelines for the design of recurved parapet wall.The results of the work are carried out by menas of numerical simulations, carried out with OpenFOAM ®. The goal is to describe the influence of the wave period on the confined-crest impact (Castellino et al., 2018). The confined-crest impact...
Conference Paper
A new methodology has been defined to calculate three-dimensional loads (forces and moments) and hydraulic stability (sliding and overturning) on concrete caissons all alo ng construction stages of their life cycle, from isolated caissons to the final operation phase. The study of wave loading on the caisson has been simulated using a coupling of t...
Conference Paper
In this paper we present a new method for numerically modelling landslide-generatedtsunamis in OpenFOAM® by using a new approach based on the Overset mesh technique. This technique, which is based on the use of two (or more) numerical domains, is new in the coastal engineering field and appears to be extremely powerful to model the interaction betw...
Article
Historic coastal structures have played a key role in small- to medium-size ports, being the driving force for the local development of coastal communities. Because coastal managers require reliable risk-based analysis of the whole life cycle of these coastal structures, previous lifetimes should be studied. This is a differentiating factor with re...
Article
Full-text available
We use a numerical model, already validated for this purpose, to simulate the effect of wave frequency spread on wave transformation and swash amplitudes. Simulations are performed for planar beach slope cases and for offshore wave spectra whose frequency spread changes over realistic values. Results indicate that frequency spread, under normally a...
Article
Full-text available
In a time span of over 3,000 years, the function of harbor breakwaters has remained the same (i.e., the energy dissipation), with differences depending on the general breakwater configurations: rubble mound breakwaters or caisson breakwaters. The recent demands of the sea level rise and the intensification of extreme events related to climate chang...
Article
Full-text available
This study investigates the capacity of a Spartina alterniflora meadow to attenuate waves during storm events based on field observations in the Chesapeake Bay. These observations reveal that environmental conditions including the ratio between water depth and plant height (hr), the ratio between wave height (HS) and water depth, and current direct...
Article
With the aim of better understand and parameterize the physical processes involved in flow-mangrove interaction, wave attenuation and drag forces along a 1:6 scale fringe Rhizophora mangrove forest are studied experimentally. The 26 m long forest is composed by 135 models built reproducing mature Rhizophora mangrove trees with 24 prop roots. Hydrod...
Article
Rubble mound-breakwaters are commonly constructed with a parapet or crown-wall at the crest. The design of these superstructures depends on the expected storm wave load history throughout the service life cycle. In tsunami-prone areas, this design must include tsunami actions since their loads can definitely exceed those of storm waves. However, ts...
Presentation
In recent years, there has been an increasing interest in modelling floating structures in marine environments. A considerable amount of research has been done in the fields of renewable energy, naval engineering and oil-gas industry. Movable structures like wave energy converters (OWC) or floating offshore wind turbines (FOWT), moored ships or flo...
Conference Paper
Full-text available
This paper describes 2-D numerical simulations aiming to reproduce the pressure impulse named confined-crest impact (Castellino et al., 2018), which occurs when a recurved parapet wall and non-breaking wave conditions are interacting. The simulations are carried out by using the IH2VOF and IHFOAM, the latter developed as OpenFOAM additional library...
Article
Full-text available
The hybrid non-conventional breakwaters are innovative coastal structures, which have as a primary function the coastal and harbours protection, but with the important benefit of electricity production, due to their combination with Wave Energy Converters. The most recent example of a non-conventional breakwater is called OBREC, standing for Overto...
Article
Full-text available
Numerical modelling of the interaction of water waves with coastal structures has continuously been among the most relevant challenges in coastal engineering research and practice. During the last years, 3D modelling based on RANS-type equations, has been the dominant methodology to address the mathematical modelling of wave and coastal structure i...
Article
Tsunamis are relatively infrequent but very destructive phenomena that can cause devastating consequences on coastal areas. In view of recent tragic episodes, the scientific community is strengthening their efforts to develop strategies to mitigate the risk of tsunami consequences, specially focused on the potentially affected areas. One of the str...
Article
Mangrove forests exist in intertidal areas of tropical zones and most are characterized by their complex root systems, which attenuates flow energy. Among the mangrove species, Rhizophora species is the most common one, representing approximately 90% of the world mangrove distribution (Ohira et al., 2013). In addition, this species is used in the m...
Article
This paper describes 2-D numerical simulations aiming to reproduce the pressure impulse named confined-crest impact (Castellino et al., 2018), which occurs when a recurved parapet wall and non-breaking wave conditions are interacting. The simulations are carried out by using the IH2VOF and IHFOAM, the latter developed as OpenFOAM additional library...
Article
This paper presents the stability analysis of a non-conventional breakwater cross-section integrating an overtopping wave energy converter, named OBREC. The device consists of a traditional rubble-mound breakwater in which the upper part of the armour layer is replaced by a smooth ramp and a reservoir. The analysis of the structure is carried out...
Presentation
Full-text available
Numerical modelling of the interaction of water waves with coastal and offshore structures has continuously been among the most relevant challenges in engineering research and practice. During the last years, 3D modelling based on RANS-type equations, has been the dominant methodology to address the mathematical modelling of wave and structure inte...
Conference Paper
Numerical modelling of floating bodies is still being a very challenging issue, especially for large body displacements. Despite of the good performance of potential flow models in predicting floating body dynamics, there are still physical processes which are not well reproduced with that approximation. Their strong assumptions yield a lack of acc...
Article
Recent tragic tsunami events, like those that occurred in the Indian Ocean in 2004, and in Japan in 2011, have revealed the need of further work to reduce tsunami risk in coastal areas. An important aspect towards risk reduction is the study of the interaction between tsunami waves and coastal structures as these are the first to receive the tsunam...
Presentation
Velocity caps are part of an offshore intake structure often used to collect water from the ocean for cooling systems in power plants or for desalinization plants. As a general rule, they are used to be placed between 20 and 30 m. However, according to the seabed characteristics,the tower has to be located in shallower water areas (<20 m) where wav...
Presentation
Full-text available
Oceanwaves and current flows (mainly tidal flow) exist simultaneouslyin natural environments. The interaction between wavesand a current flow has attracted great attention fromscience and industry, as it plays an important role in sediment transport,seabed stabilityand in the interaction of waves and current flows with structures in the marine envi...
Conference Paper
Full-text available
This work presents a Level III approach for calculating the ultimate limit states (ULS) of the type section of Laredo's breakwater. The proposed method is based on the simulation of many loading cycles over the breakwater, counting how often the failure threshold of each element is exceeded. A climate emulator based on weather patterns is used to c...
Conference Paper
Full-text available
In the present paper, a two-dimensional VOF-type model (IH2-VOF) based on the Volume-Averaged Reynolds-Averaged Navier-Stokes equations (VARANS) is used to study the wave interaction with a non-conventional rubble-mound breakwater integrated with an Overtopping Device denominated OBREC, an acronym for Overtopping BReakwater for Energy Conversion. T...
Article
The effect of vegetation patchiness on solitary wave propagation, attenuation and wave-induced forces is studied both experimentally and numerically. Vegetation patchiness is simulated with rigid cylinder configurations built by one, eight and four patches tested under emergent, near emergent and submerged conditions. These configurations are param...
Article
The mathematical modeling of the interaction of water waves with porous coastal structures has continuously been among the most relevant challenges in coastal engineering research and practice. Finding a tool to better predict essential processes, relevant to the functionality and stability of breakwaters and jetties, and how they are affected by p...
Conference Paper
Full-text available
This paper presents a summary of the physical tests performed in order to characterize and optimize a low-reflectivity perforated breakwater, currently under construction as a head for an existing vertical breakwater, in the south coast of France, at the Mediterranean sea. The size and number of holes on the main wall of the cylindrical breakwater...