[NotiAMCA] Seminario de Víctor Calo : Cancelado

[Victorio Sonzogni]

Deseamos comunicarle que el Seminario del Dr. V. Calo
programado para el 26 de noviembre ha sido cancelado.


 

-------------------------------------------
Sent: Viernes, 14 de Noviembre de 2008 14:57
To: notiamca en venus.santafe-conicet.gov.ar
Subject: [NotiAMCA] Seminario de Mecánica Computacional el 26/11 a las 17:30
hs



Estimados,

El miércoles 26 de noviembre a las 17:30 hs en el salón del Consejo de la
FIUBA (Paseo Colón 850 PB) desarrollaremos un seminario de Mecánica
Computacional.

El expositor será Víctor Calo (Ing. Civil FIUBA y Ph.D. U. Texas at Austin¡

Víctor está actualmente pasando a trabajar a,

Earth and Environmental Science and Engineering and Applied

Mathematics and Computational Science, King Abdullah University of

Science and Technology (KAUST)

El tema de la charla será:

Variational and Multiscale Modeling

Abstract

A variational framework for modeling non-linear multi-physics problems

is presented for standard and isogeometric finite element methods. The

variational formulation is designed such that fundamental mathematical

and physical features of the solution are built into the weak form,

while the formulation is kept flexible and robust. The construction of

the variational form is twofold. First, a multiscale decomposition of

the solution into coarse and fine scales is introduced a priori. The

coarse scales are identified with the finite element approximation,

while the fine scales are identified with the subgrid scales and need

to be modeled. Using the Navier-Stokes equations as a model problem, a

residual-based approximation of the fine scales is made, and

alternative approximations of the fine scales based on element

subproblems are currently being explored. Second, weak imposition of

boundary conditions and coupling is used to introduce physical

modeling when necessary. To discuss in detail the different parts

inherent to the methodology, variational multiscale decomposition is

used to derive a turbulence model for Large Eddy Simulation (LES) and

weak imposition of boundary conditions is used to build a consistent

wall model for wall-bounded turbulent flows. Following, this

variational framework is used to model drug delivery in idealized and

patient-specific geometrical models of the cardiovascular system,

where the variational multiscale method is used to stabilize the weak

form and weak imposition of boundary conditions is used to model

endothelial permeability. In the simulations presented NURBS-based

isogeometric analysis is employed to describe the geometry and

discretize the balance equations. To conclude future research

directions and applications will be discussed.