FAQ

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Here you can find answers to some frequently asked questions about using the OnScale plugin in BeamTool 9.

Getting Started

What do I need?

OnScale plugin is a free tool included in the latest version of BeamTool. There is no requirement to download or install the OnScale software. In order to access OnScale simulation you simply need to have the two following requirements:

  • BeamTool 9
  • An OnScale BeamTool account

Can I try before I buy?

Yes, there is a free 10 day trial available for both the latest version of BeamTool and an OnScale account:

How do I get support?

A: You can get support through the following methods.

OnScale

What is a Core-Hour? 

A Core-Hour is how OnScale measures and charges computation time on the cloud. It’s the product of the number of cores used for a simulation and the number of hours the simulation takes to run. If running multiple simulations in parallel, the total Core-Hour cost is the sum of all simulations cost.

For example:

  • One simulation running on 2 cores for 1 hour uses 2 Core-Hours
  • One simulation running on 4 cores for 2 hour uses 8 Core-Hours
  • Ten simulations running on 2 cores for 0.1 hours (6 minutes) uses 2 Core-Hours

How long will a typical job take?

The time to run a simulation is very dependant on the model scenario, including:

  • Simulation time
    • Running a simulation for a longer time period will increase the time to complete the simulation
  • Model size
    • The larger the model size, the longer the model will take to complete
    • Model size can be impacted by the size of the model region and the density of the FEA mesh.
  • Number of cores used for each simulation
    • OnScale simulations solve time scales linearly with the number of cores used with more cores allowing for a faster simulation time.

What meshing should I use? How will it affect accuracy?

The meshing of OnScale jobs in BeamTool is defaulted to a suitable level to provide accurate results for the model scenario. The meshing can be adjusted in the advanced settings which allows for the number of elements per wavelength to be defined. The minimum wavelength is always used and is determined by the probe frequency and the slowest material velocity (considering both bulk and shear). Increasing the number of elements per wavelength will provide a more accurate result but generates a larger model size that will take longer to solve. Reducing the number of elements per wavelength can make the model faster to run but can reduce result accuracy. Therefore, a trade-off between accuracy and simulation time is often required.

Do the simulations run in parallel?

Yes, this is the major advantage of OnScale where users have an unlimited number of licenses and access to scalable cloud hardware. This allows for 10s, 100s, or even 1,000s of simulations to be run in parallel. When BeamTool beamsets are simulated, all beams are automatically simulated in parallel to obtain results faster.

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