En este trabajo se evaluo y valido un codigo de elementos finitos para la resoluci on de las ecua... more En este trabajo se evaluo y valido un codigo de elementos finitos para la resoluci on de las ecuaciones de Navier-Stokes, el cual esta siendo desarrollado en conjunto por el Departamento de Mecanica Computacional de la Comision Nacional de Energia Atomica de Argentina y la Universidad de San Pablo, Brazil. Ademas se implemento y valido un esquema numerico, capaz de simular el transporte de escalares en fluidos para problemas de ingenieria. El esquema implementado es un esquema de pasos fraccionados, en donde se aplica primero un paso de adveccion a traves de la tecnica de adveccion semi-lagrangiana y luego un paso de difusion a traves del metodo de elementos finitos. Con el objetivo de lograr un codigo eficiente que sirva para resolver problemas de gran tamano, el codigo se implemento con procesamiento en paralelo.
Calculating the behavior of large composite material structures still demanding large computation... more Calculating the behavior of large composite material structures still demanding large computational effort. The solu-tion proposed to tackle the problem is to combine multi-scale homogenization methods with the high performance computa-tional techniques available. This PhD work aims to implement inside the Alya HPC-code a multi-scale algorithm capable of solving this kind of problems in an efficient and accurate way.
This thesis aims to develop a High-Performance Computing implementation to solve large composite ... more This thesis aims to develop a High-Performance Computing implementation to solve large composite materials problems through the use of the FE2 multi-scale method. Previous works have not been able to scale the FE2 strategy to real size problems with mesh resolutions of more than 10K elements at the macro-scale and 100 3 elements at the micro-scale. The latter is due to the computational requirements needed to carry out these calculations. This works identifies the most computationally intensive parts of the FE2 algorithm and ports several parts of the micro-scale computations to GPUs. The cases considered assume small deformations and steady-state equilibrium conditions. The work provides a feasible parallel strategy that can be used in real engineering cases to optimize the design of composite material structures. For this, it presents a coupling scheme between the MPI multi-physics code Alya (macro-scale) and the CPU/GPU-accelerated code Micropp (micro-scale). The coupled system i...
This poster exposes the results of a new implementation of the FE2 multi-scale algorithm that is ... more This poster exposes the results of a new implementation of the FE2 multi-scale algorithm that is achieved by coupling the multiphysics and massively parallel code Alya with the GPU-based code Micropp. The coupled code is mainly designed to solve large scale and realistic composite material problems for the aircraft industry. Alya is responsible of solving the macro-scale equations and Micropp for solving the representation of fibres at the microscopic level. The poster shows computational performance results that demonstrate that the technique is scalable for real size industrial problems and also how the execution time is dramatically reduced using GPU-based clusters.
The problem of the cost and speed of the experimental method can be solved with the computational... more The problem of the cost and speed of the experimental method can be solved with the computational simulations. They involve to develop physical models in order to get accurate solutions, this can be a difficult task depending on the composite material we are dealing with. The most common numerical procedure used in this field is the finite element method (FEM) that is combined with constitutive laws to relate the physical variables of the problem. These laws relate the stresses σ and the strains that are defined at every point in the domain ant they are obtained through experiments.
En este trabajo se evaluo y valido un codigo de elementos finitos para la resoluci on de las ecua... more En este trabajo se evaluo y valido un codigo de elementos finitos para la resoluci on de las ecuaciones de Navier-Stokes, el cual esta siendo desarrollado en conjunto por el Departamento de Mecanica Computacional de la Comision Nacional de Energia Atomica de Argentina y la Universidad de San Pablo, Brazil. Ademas se implemento y valido un esquema numerico, capaz de simular el transporte de escalares en fluidos para problemas de ingenieria. El esquema implementado es un esquema de pasos fraccionados, en donde se aplica primero un paso de adveccion a traves de la tecnica de adveccion semi-lagrangiana y luego un paso de difusion a traves del metodo de elementos finitos. Con el objetivo de lograr un codigo eficiente que sirva para resolver problemas de gran tamano, el codigo se implemento con procesamiento en paralelo.
Calculating the behavior of large composite material structures still demanding large computation... more Calculating the behavior of large composite material structures still demanding large computational effort. The solu-tion proposed to tackle the problem is to combine multi-scale homogenization methods with the high performance computa-tional techniques available. This PhD work aims to implement inside the Alya HPC-code a multi-scale algorithm capable of solving this kind of problems in an efficient and accurate way.
This thesis aims to develop a High-Performance Computing implementation to solve large composite ... more This thesis aims to develop a High-Performance Computing implementation to solve large composite materials problems through the use of the FE2 multi-scale method. Previous works have not been able to scale the FE2 strategy to real size problems with mesh resolutions of more than 10K elements at the macro-scale and 100 3 elements at the micro-scale. The latter is due to the computational requirements needed to carry out these calculations. This works identifies the most computationally intensive parts of the FE2 algorithm and ports several parts of the micro-scale computations to GPUs. The cases considered assume small deformations and steady-state equilibrium conditions. The work provides a feasible parallel strategy that can be used in real engineering cases to optimize the design of composite material structures. For this, it presents a coupling scheme between the MPI multi-physics code Alya (macro-scale) and the CPU/GPU-accelerated code Micropp (micro-scale). The coupled system i...
This poster exposes the results of a new implementation of the FE2 multi-scale algorithm that is ... more This poster exposes the results of a new implementation of the FE2 multi-scale algorithm that is achieved by coupling the multiphysics and massively parallel code Alya with the GPU-based code Micropp. The coupled code is mainly designed to solve large scale and realistic composite material problems for the aircraft industry. Alya is responsible of solving the macro-scale equations and Micropp for solving the representation of fibres at the microscopic level. The poster shows computational performance results that demonstrate that the technique is scalable for real size industrial problems and also how the execution time is dramatically reduced using GPU-based clusters.
The problem of the cost and speed of the experimental method can be solved with the computational... more The problem of the cost and speed of the experimental method can be solved with the computational simulations. They involve to develop physical models in order to get accurate solutions, this can be a difficult task depending on the composite material we are dealing with. The most common numerical procedure used in this field is the finite element method (FEM) that is combined with constitutive laws to relate the physical variables of the problem. These laws relate the stresses σ and the strains that are defined at every point in the domain ant they are obtained through experiments.
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Papers by Guido Giuntoli