[NotiAMCA] Defensa Tesis L. Garelli "FLUID STRUCTURE INTERACTION USING AN ALE FORMULATION" (FICH UNL)

[Mario Storti]

DOCTORADO EN INGENIERÍA
FACULTAD DE INGENIERÍA Y CIENCIAS HÍDRICAS   UNIVERSIDAD NACIONAL DEL LITORAL
INSTITUTO DE DESARROLLO TECNOLÓGICO PARA LA INDUSTRIA QUÍMICA

DEFENSA PÚBLICA DE LA TESIS DOCTORAL

Titulo: FLUID STRUCTURE INTERACTION USING AN ARBITRARY LAGRANGIAN
EULERIAN FORMULATION

ABSTRACT:
Multidisciplinary and Multiphysics coupled problems represent nowadays a
challenging field when studying even more complex phenomena that appear in
nature and in new technologies (e.g. Magneto-Hydrodynamics, Micro-Electro-
Mechanics, Thermo-Mechanics, Fluid-Structure Interaction, etc.). Particularly,
when dealing with Fluid-Structure Interaction problems several questions arise,
namely the coupling algorithm, the mesh moving strategy, the Galilean Invari-
ance of the scheme, the compliance with the Discrete Geometric Conservation
Law (DGCL), etc. Therefore, the aim of this thesis is the development and
implementation of a coupling algorithm for existing modules or subsystems,
in order to carry out FSI simulations with the focus on distributed memory
parallel platforms. Regarding the coupling techniques, some results on the
convergence of the strong coupling Gauss-Seidel iteration are presented. Also,
the precision of different predictor schemes for the structural system and the
influence of the partitioned coupling on stability are discussed. Another key
point when solving FSI problems is the use of the   Arbitrary Lagrangian
Eulerian formulation   (ALE), which allows the use of moving meshes. As
the ALE contributions affect the advective terms, some modifications on the
stabilizing and the shock-capturing terms, are needed. Also, the movements of
the fluid mesh produces a volume change in time of the elements, which adds
to the fluid formulation an extra conservation law to be satisfied. The law is
known as the Discrete Geometric Conservation Law (DGCL). In this thesis a
new and original methodology for developing DGCL compliant formulations
based on an Averaged ALE Jacobians Formulation (AJF) is presented.

Tesista: Ing. Luciano GARELLI

Director:  Dr. Mario Storti
Codirector: Dr. Rodrigo Paz

Lunes 19 de diciembre de 2011   11:00 hs.
Aula Magna FICH

Jurado:
. Marcela Cruchaga (Univ de Santiago de Chile)
. Sergio Idelsohn (CIMEC-INTEC, CONICET-UNL, Santa Fe)
. Axel Larreteguy (Univ Argentina de la Empresa, UADE, Buenos Aires)
. Carlos Sacco (Inst Univ Aeronáutico, Córdoba)

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Mario Alberto Storti [cel. +54-342-5122135]
CIMEC (INTEC/CONICET-UNL)
Predio CONICET-Santa Fe
Colect. Ruta Nac. 168 Km 472, Paraje El Pozo
3000 Santa Fe, Argentina
Tel: +54-342-4511594 (ext 1015), Tel/Fax: +54-342-4511169
Home: +54-342-4550193, e-mail: mario.storti at gmail.com
http://www.cimec.org.ar/mstorti
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