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Simon Cox (University of Southampton) Engineering Workflows (= ‘Scripts’)

Simon Cox (University of Southampton) Engineering Workflows (= ‘Scripts’). Scenario: Design optimisation Model device, discretize, solve, postprocess, optimise Scripting approach Flexibility & High-level functionality Quick application development

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Simon Cox (University of Southampton) Engineering Workflows (= ‘Scripts’)

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  1. Simon Cox (University of Southampton)Engineering Workflows (= ‘Scripts’) • Scenario: Design optimisation • Model device, discretize, solve, postprocess, optimise • Scripting approach • Flexibility & High-level functionality • Quick application development • Extend user’s existing PSE e.g. Matlab, Python, ... • … is our execution/ enactment engine too • Favourite things to do • Create, Retrieve, Cut ‘n’ Shut (Re-use anything and everything) • Configure, Execute, Monitor (Bring Grid to user) • Share, Steer, Dynamically modify (Semantic support)

  2. Energy Bandgap Photonic Crystal - Optimisation User CAD Model & Parameters CAD Model & Parameters Location, size & density of holes determine the optical bandgap. Discretization “On the Grid” Numerical Solver Intermediate Result The aim of this design optimisation process is to find a configuration which maximises this bandgap and minimizes energy loss. Optimised Design User User: Molinari CAD Model A Parameter1 Rad Parameter2 Pos Optimise BGap Computed X Iter Log File

  3. Design

  4. Matlab Grid-Enabled Scripting Environment • Motivations: • Flexible, transparent access to computational resources • Easy to use for engineers (and in widespread use) • Our Approach • Matlab chosen as the hosting environment • Extend the user’s existing PSE • High-level functionality • Quick application development • … is our execution/ enactment engine too • Computational resources exposed in the form of Matlab functions • Job submission to Globus server using Java Cog • Job submission to Condor pool via Web services interface • Integration of CAD, Mesh generation, and Fluent solver via the use of intermediate data format, often standard-based, or package-neutral • Hybrid search strategies to make the best use of different search methods • Can also use Python, Jython, etc.

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