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Mesh generation for the simulation of Li-ion batteries on supercomputers using GPUs

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Mesh on a complicated shape similiar to Li-ion electrode particles

Short Description

Electric cars such as the Tesla Roadster have a high demand for better Li-ion batteries.
Microscopic image of electrode particles in a Li-ion battery
Visualization of Lithium concentration in an electrode particle

We are developing a simulation software that will help significantly improve the performance of next-generation Li-ion batteries. These batteries are widely used as portable power sources, in your smartphone or laptop as well as in Boeing’s 787 Dreamliner or Tesla automobiles. Our software will be designed to run on Piz Daint, Europe’s fastest supercomputer.

Your task is to investigate algorithms and/or develop a software to generate the geometrical model of electrodes in Li-ion batteries for the simulation on supercomputers equipped with GPUs. Depending on your interests, we can define a more theoretical or a hands-on programming project.

Status: Available

Looking for 1-2 students in Electrical Engineering, Computer Science or related fields
Project duration can be defined according to your needs
Contact: Michael Bieri

Prerequisites

Be fluent in a programming language, preferably Matlab, C, C++ or Java
Background in computer engineering or computer science
No knowledge about numerical simulation or batteries required

Character

10-40% Research about existing approaches
20-80% Programming
10-40% Theory

Professor

Mathieu Luisier

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Detailed Task Description

Project Overview

Our software will be designed for Piz Daint, Europe's fastest supercomputer.
Nvidia Tesla GPU with a peak performance of 1.3 TFLOPs (10x faster than high-end CPU).

Over the last couple of years, Graphics Processing Units (GPUs), originally designed for video games, have evolved into high performance parallel processors. GPUs provide a peak performance up to 10x higher than a high-end 8-core CPU and are therefore widely used in current supercomputer architectures. However, in order to fully leverage their computational power, novel approaches for numerical simulation have to be developed.

The first step in many simulation techniques such as the Finite Element Method (FEM) is to approximate the geometry of the model by a (triangular) mesh. Even though most batteries are manufactured in simple cylindrical or cubic shapes, the performance-critical inner electrodes are complicated structures with scales going from nanometers to several 100 micrometers. It is a challenging task to build a useful mesh on such a multi-scale structure. Furthermore, the topology of the mesh has to be highly regular in order to achieve good performance on GPUs.

Goals

Depending on your interests, you will work on one or more of the following sub-tasks:

  • Generation of realistic electrode structures either by simulation or from real-world data in collaboration with experimental groups.
  • Research and evaluation of currently existing algorithms and libraries for the construction of regular meshes.
  • Implementation and investigation of your own or existing algorithms. The focus could be set on theoretical considerations as well as on a high performance implementation.
  • Integration and adaption of an existing mesh generator into our simulation software..
  • Investigation of mesh generation directly on GPUs.

Practical Details

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