Transcript of In-situ Visualization and Analysis of Plasma Surface Interaction Simulations Wathsala...
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- In-situ Visualization and Analysis of Plasma Surface
Interaction Simulations Wathsala Widanagamaachchi SCI Institute,
University of Utah Mentors : Li-Ta Lo, Chris Sewell & Jim
Ahrens
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- What are PSI simulations? Tungsten in future nuclear fusion
reactors When exposed to helium & hydrogen plasmas, Surface
defects and bubbles form Molecular dynamics (MD) simulations Data :
LAMMPS simulation of Plasma Surface Interaction
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- What is in-situ visualization & analysis? In-situ is a
Latin phrase on site or in position Motivation Ever-increasing
sizes of simulation data Post-processing is challenging disk I/O
and the network bandwidths Data reduction method to the output data
Apply visualization & analysis during runtime
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- ParaView pipeline Reproduce existing ParaView pipeline Using
Threshold Gaussian Splatter Isosurface Box Clip Glyph Tungsten
Cavities Helium Bubbles
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- LAMMPS + VTK Pipeline Collocate simulation with visualization
& analysis LAMMPS as an external library within C++ At each
time step, Simulation Visualization & analysis Lessons learnt :
Working with LAMMPS & VTK
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- LAMMPS + VTK Pipeline
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- Serial & Parallel versions Serial : complete Parallel :
technical issues with some VTK filters Gaussian Splatter Fast
Splatter Lessons learnt : Creating a ParaView plugin Filters are
not parallel
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- Visualization Feedback from a domain scientist Definitions of
Helium bubbles & Tungsten cavities all Helium atoms reachable
through links shorter than the lattice unit (within the simulation)
is considered to be in one bubble Realistic parameters to be used
Helium atoms clustering in LAMMPS Evolution of bubbles &
cavities Details to output (Data files & images) Running an
entire simulation Larger dataset Karl Hammond, Department of
Nuclear Engineering, University of Tennessee
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- Visualization Feedback from an artist Better color maps
Francesca Samsel, Los Alamos National Laboratory Lessons learnt :
Importance of color in visualizations
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- Visualization Camera movement, Timers Rendering issues depth
ordering Correct image
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- Analysis Helium clustering using LAMMPS Evolution of Helium
bubbles Volume overlap of bubbles New color map to show evolution
Displaying of statistics Percentage of atoms Helium bubbles, splits
& merges
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- Video
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- Thank you.