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You searched for +publisher:"Université Catholique de Louvain" +contributor:("Danilov, Sergey"). Showing records 1 – 2 of 2 total matches.

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Université Catholique de Louvain

1. Blaise, Sébastien. Development of a finite element marine model.

Degree: 2009, Université Catholique de Louvain

Numerical models are very helpful to understand the behaviour of the marine system. Ocean models have been developed for more than forty years, and their design is an area of active research. If the representation of the physics has been highly improved, the fundamental numerical technique has not evolved: they still use the finite difference method on structured grids. Recent efforts focus on developing the new generation of ocean models, taking advantage of the potential of modern numerical methods. Based on unstructured grids, such models allow to faithfully represent complex topographic features such as the coastlines, narrow straits and islands. The mesh resolution can be refined locally in regions of interest or where the dynamics is more demanding. This PhD dissertation focuses on the development of a three-dimensional baroclinic marine model using the Discontinuous Galerkin finite element method. The model is described, with some results of baroclinic simulations. The rest of the thesis is devoted to different types of unresolved physics. Two different boundary layers are introduced: the bottom velocity boundary layer and the boundary layer of the residence time. Both parameterisation and representation using the extended finite element method are discussed. A chapter is dedicated to the treatment of the horizontal density gradient in baroclinic column models. Attention is paid to the stability of the method under different configurations. Then, the turbulence modelling in three-dimensional models is studied by comparing the effect of different turbulence closure models on a simulation of the flow around a shallow-water island.

(FSA 3)  – UCL, 2009

Advisors/Committee Members: UCL - FSA/MECA - Département de mécanique, Deleersnijder, Eric, Remacle, Jean-François, Winckelmans, Grégoire, Legat, Vincent, Beckers, Jean-Marie, Burchard, Hans, Danilov, Sergey.

Subjects/Keywords: Finite element method; Ocean model; Discontinuous Galerkin; Residence time; Turbulence; Boundary layer

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Blaise, S. (2009). Development of a finite element marine model. (Thesis). Université Catholique de Louvain. Retrieved from http://hdl.handle.net/2078.1/28565

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Blaise, Sébastien. “Development of a finite element marine model.” 2009. Thesis, Université Catholique de Louvain. Accessed October 20, 2019. http://hdl.handle.net/2078.1/28565.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Blaise, Sébastien. “Development of a finite element marine model.” 2009. Web. 20 Oct 2019.

Vancouver:

Blaise S. Development of a finite element marine model. [Internet] [Thesis]. Université Catholique de Louvain; 2009. [cited 2019 Oct 20]. Available from: http://hdl.handle.net/2078.1/28565.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Blaise S. Development of a finite element marine model. [Thesis]. Université Catholique de Louvain; 2009. Available from: http://hdl.handle.net/2078.1/28565

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Université Catholique de Louvain

2. Pestiaux, Alice. Parameterization of subgrid-scale processes in finite element sea ice - ocean models.

Degree: 2015, Université Catholique de Louvain

With the continuous improvement of models for better climate studies and predictions, simulating small scale physical processes remain a challenge. From this perspective, subgrid-scale parameterizations are used whenever such processes cannot be explicitly represented and when their inclusion is beneficial to simulations. However, the parameterizations result from approximations of the reality and also present drawbacks in specific circumstances. In order to prevent these parameterizations from shifting to unphysical behaviours, numerical artefacts are frequently used. In models based on the finite element method, these artefacts are distinctive due to the specificity of the formalism itself. The goal of this doctoral thesis is first to find the best compromise between these numerical artefacts and the preservation of physical processes, through the study of subgrid-scale oceanic parameterizations in a model based on the finite element method. Second, a coupled sea ice – ocean model is built from two disctinct models in order to take advantages of each of them, i.e., unstructured meshes and sophisticated representation of sea ice physics. Through this thesis, these different models are successively used in configurations of increasing complexity, in order to understand the impacts of parameterizations on the models physics accuracy and their skills with respect to observations.

(SC - Sciences)  – UCL, 2015

Advisors/Committee Members: UCL - SST/ELI/ELIC - Earth & Climate, UCL - Faculté des Sciences, Fichefet, Thierry, Deleersnijder, Eric, De Keersmaecker, Marie-Laurence, Goosse, Hugues, Legat, Vincent, Danilov, Sergey, Vancoppenolle, Martin.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Pestiaux, A. (2015). Parameterization of subgrid-scale processes in finite element sea ice - ocean models. (Thesis). Université Catholique de Louvain. Retrieved from http://hdl.handle.net/2078.1/165095

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Pestiaux, Alice. “Parameterization of subgrid-scale processes in finite element sea ice - ocean models.” 2015. Thesis, Université Catholique de Louvain. Accessed October 20, 2019. http://hdl.handle.net/2078.1/165095.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Pestiaux, Alice. “Parameterization of subgrid-scale processes in finite element sea ice - ocean models.” 2015. Web. 20 Oct 2019.

Vancouver:

Pestiaux A. Parameterization of subgrid-scale processes in finite element sea ice - ocean models. [Internet] [Thesis]. Université Catholique de Louvain; 2015. [cited 2019 Oct 20]. Available from: http://hdl.handle.net/2078.1/165095.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pestiaux A. Parameterization of subgrid-scale processes in finite element sea ice - ocean models. [Thesis]. Université Catholique de Louvain; 2015. Available from: http://hdl.handle.net/2078.1/165095

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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