Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

Sorted by: relevance · author · university · dateNew search

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

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


Université Catholique de Louvain

1. Hillewaert, Koen. Development of the discontinuous Galerkin method for high-resolution, large scale CFD and acoustics in industrial geometries.

Degree: 2013, Université Catholique de Louvain

The recent advent of unstructured high order methods holds the promise of transforming industrial computational fluid dynamics practices. These novel methods combine high precision to high geometrical flexibility, but also provide excellent serial and parallel efficiency up to very large core counts. They also provide many possibilities for adaptive resolution, including accurate non-conformal connections and order adaptation. Due to the combination of these features, these methods are technically better suited for industrial scale resolving computations than the second order finite volume codes that pervade industrial CFD. As this type of computations will be required in the near future, and industrial simulation practices have not yet been firmly established, there is a unique window of opportunity to introduce these novel high-potential methods. Of these methods, the discontinuous Galerkin method is arguably the most mature, in terms of the theoretical framework, its practical deployment and applications. The main objective of this work is the development of this method for tackling scale-resolving simulations of turbomachinery flows. This thesis treats important practical and theoretical steps towards this goal. The first contribution is the study of the stability of the interior penalty method on hybrid meshes. Through the sharp computation of a trace inverse inequality, already available for simplex meshes, for all types of elements, and the generalisation of the coercivity analysis, optimal penalty parameters are found. In particular a specific variant for high aspect ratio meshes, typical for CFD, has been found. A further development concerns the definition of optimal data structures and assembly routines, based on the evaluation of computational performance of algebraic primitives. It has been shown how to define an extremely flexible matrix structure, whilst obtaining very high efficiency. By the reorganisation of assembly routines the increase of computational complexity with interpolation order is largely compensated higher computational efficiency. Both matrix-free GMRES and p-multigrid iterative strategies are furthermore implemented and compared. For the p-multigrid strategy, a generic framework is presented that provides high-quality transfer operators for h- and p-multigrid. Finally, a number of conceptual extensions to the DGM are proposed, namely the practical implementation of a non-conformal method for incompressible flows, as well as the application to frequential formulations, in particular of the Linearised Euler Equations including Perfectly Matched Layers. A first industrial CFD application is shown, which concerns the direct numerical simulation of transitional flow in a low pressure turbine cascade.

(FSA 3)  – UCL, 2013

Advisors/Committee Members: UCL - SST/IMMC/IMMC - Institute of Mechanics, Materials and Civil Engineering, Remacle, Jean-François, Winckelmans, Grégoire, Legat, Vincent, Chatelain, Philippe, Geuzaine, Philippe, Dick, Erik, Abgrall, Rémi, Chevaugeon, Nicolas.

Subjects/Keywords: Computational fluid dynamics; Discontinuous Galerkin; Finite element methods; Fast assembly; Iterative methods; Computational acoustics; Stability analysis; Interior penalty methods

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

Hillewaert, K. (2013). Development of the discontinuous Galerkin method for high-resolution, large scale CFD and acoustics in industrial geometries. (Thesis). Université Catholique de Louvain. Retrieved from http://hdl.handle.net/2078.1/128254

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):

Hillewaert, Koen. “Development of the discontinuous Galerkin method for high-resolution, large scale CFD and acoustics in industrial geometries.” 2013. Thesis, Université Catholique de Louvain. Accessed October 15, 2019. http://hdl.handle.net/2078.1/128254.

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

MLA Handbook (7th Edition):

Hillewaert, Koen. “Development of the discontinuous Galerkin method for high-resolution, large scale CFD and acoustics in industrial geometries.” 2013. Web. 15 Oct 2019.

Vancouver:

Hillewaert K. Development of the discontinuous Galerkin method for high-resolution, large scale CFD and acoustics in industrial geometries. [Internet] [Thesis]. Université Catholique de Louvain; 2013. [cited 2019 Oct 15]. Available from: http://hdl.handle.net/2078.1/128254.

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

Council of Science Editors:

Hillewaert K. Development of the discontinuous Galerkin method for high-resolution, large scale CFD and acoustics in industrial geometries. [Thesis]. Université Catholique de Louvain; 2013. Available from: http://hdl.handle.net/2078.1/128254

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


Université Catholique de Louvain

2. Wu, Liang. Numerical simulation of Czochralski bulk crystal growth process : investigation of transport effects in melt and gas phases.

Degree: 2008, Université Catholique de Louvain

The main objective of this thesis aims at developing a new generation of software products, in order to obtain a fully automatic simulator predicting the entire Czochralski process while handling correctly the switches between the different growth stages. First of all, new efficient, robust and high-quality automatic mesh generation algorithms with enough flexibility for any complex geometry were implemented, including a 1D mesh generator by global grade-adaptive method, a 2D initial triangulation algorithm by improved sweep line technique and an automatic 2D shape-quality unstructured mesh generator by modified incremental Delaunay refinement technique. Secondly, a Finite Element Navier-Stokes solver based on unstructured meshes was developed and validated. Enhanced turbulence models based on the classical mixing-length or k-l model, together with a generic transformation method to avoid negative k when solving the turbulent kinetic energy equation by the Newton-Raphson iterative method were introduced and implemented. Moreover, laminar and turbulent mathematical models governing the gas convection, thermal distribution and oxygen concentration were developed, and Finite Element numerical methods to solve these governing equations on unstructured meshes were implemented, while appropriate numerical approaches to capture the wall shear stress exerted by the gas flow and experienced by the silicon melt were investigated. Finally, a series of numerical experiments devoted to investigate the industrial Czochralski crystal growth process under various growth conditions are presented based on all the developments implemented. Comparisons of the simulation results with literature and available experimental observations are also presented, and conclusions are drawn based on these simulation results and observations.

(FSA 3)  – UCL, 2008

Advisors/Committee Members: UCL - FSA/MECA - Département de mécanique, Dupret, François, Samin, Jean-Claude, Winckelmans, Grégoire, Van den Bogaert, Nathalie, Ryckmans, Yves, Regnier, Vincent, Legat, Vicent, Dick, Erik.

Subjects/Keywords: Numerical modelling; Crystal growth; Melt convection; Mesh generation; Oxygen transport; Gas convection

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

Wu, L. (2008). Numerical simulation of Czochralski bulk crystal growth process : investigation of transport effects in melt and gas phases. (Thesis). Université Catholique de Louvain. Retrieved from http://hdl.handle.net/2078.1/19634

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):

Wu, Liang. “Numerical simulation of Czochralski bulk crystal growth process : investigation of transport effects in melt and gas phases.” 2008. Thesis, Université Catholique de Louvain. Accessed October 15, 2019. http://hdl.handle.net/2078.1/19634.

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

MLA Handbook (7th Edition):

Wu, Liang. “Numerical simulation of Czochralski bulk crystal growth process : investigation of transport effects in melt and gas phases.” 2008. Web. 15 Oct 2019.

Vancouver:

Wu L. Numerical simulation of Czochralski bulk crystal growth process : investigation of transport effects in melt and gas phases. [Internet] [Thesis]. Université Catholique de Louvain; 2008. [cited 2019 Oct 15]. Available from: http://hdl.handle.net/2078.1/19634.

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

Council of Science Editors:

Wu L. Numerical simulation of Czochralski bulk crystal growth process : investigation of transport effects in melt and gas phases. [Thesis]. Université Catholique de Louvain; 2008. Available from: http://hdl.handle.net/2078.1/19634

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

.