# [NotiAMCA] Seminario de Mecánica Computacional el 26/11 a las 17:30 hs

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Vie Nov 14 14:56:32 ART 2008

```Estimados,
El miércoles 26 de noviembre a las 17:30 hs en el salón del Consejo de la
FIUBA (Paseo Colón 850 PB, Buenos Aires, Argentina) 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

Eduardo Dvorkin

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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.

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------------ próxima parte ------------
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.

------------ próxima parte ------------