Gabriel Barajas

Gabriel Barajas
Universidad de Cantabria | UNICAN · Environmental Hydraulics Institute "IH Cantabria"

Degree in Physical Sciences, Master Degree in Integrated Coastal Zone Management
CFD Developer & Physicist

About

36
Publications
6,648
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106
Citations
Introduction
Gabriel Barajas currently works at the Environmental Hydraulics Institute "IH Cantabria", Universidad de Cantabria. Gabriel does research in Fluid-Structure interaction, Naval Engineering and Ocean Engineering.

Publications

Publications (36)
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
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
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
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
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
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
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
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
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...
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...
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...
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...
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...
Article
Over the last years Navier-Stokes numerical models have been developed to accurately simulate wave interaction with all kinds of coastal structures, focusing on both functionality and stability of coastal structures. Although several models have been used to simulate wave interaction with coastal structures in two dimensions (2DV) there are a vast...
Conference Paper
Wave breaking is mainly a three-dimensional flow problem characterized by wave energy dissipation due to turbulence. The understanding of the wave breaking mechanism on a beach is essential in studying coastal processes. The complexity of the wave-induced turbulence flow is also increased by the presence of a two-phase flow, which introduces buoyan...
Article
Full-text available
This paper describes the capability of a new model, called IH-3VOF to simulate wave-structure interaction problems using a three-dimensional approach. The model is able to deal with physical processes associated with wave interaction with porous structures. The model considers the VARANS equations, a volume-averaged version of the traditional RANS...

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