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Swiss National Supercomputing Centre

Jerry Clarke, US Army Research Laboratory

Renato N. Elias, NACAD/COPPE/UFRJ, Rio de Janerio, Brazil

Swiss National Supercomputing Centre

Bill Daughton, LANL

Visualization Software

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What is Visualization Software?

  • For scientific simulations

​

  • Visualize data from simulations

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  • Provide means to analyze results from

simulations

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Data

Visualization

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Forms of Data

Uniform Rectilinear

(vtkImageData)

Non-Uniform Rectilinear

(vtkRectilinearData)

Curvilinear

(vtkStructuredData)

Polygonal

(vtkPolyData)

Unstructured Grid

(vtkUnstructuredGrid)

Multi-block

Hierarchical Adaptive Mesh Refinement (AMR)

Hierarchical Uniform AMR

Octree

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Application Domain Examples

Mesh Types

  • Point, Curve, 2D/3D Rectilinear, Curvilinear, Unstructured
  • Domain Decomposed, AMR
  • Time Varying
  • Primarily linear element support, limited quadratic element support

Field Types

  • Scalar, Vector, Tensor, Material Volumes, Fractions, Species

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Parallel Visualization

For visualization of extremely

large datasets

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Data Types

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  • Introduce ParaView

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  • Introduce VisIt

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  • VisIt Interface

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  • Example Project with VisIt

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​

  • Open-source, scalable, multi-platform visualization application
  • Supports distributed computational models

in order to process large datasets

  • Flexible and intuitive user interface

​

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ParaView Architecture

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User Interface

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User Interface

Menu Bar

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User Interface

Tool Bars

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User Interface

Pipeline

Browser

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User Interface

Properties

Panel

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User Interface

3D View

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VisIt

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VisIt

Interface

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VisIt Pipeline

Databases

How you read data

Plots

How you render data

Operators

How you transform/manipulate

data

Expressions

How you create new fields

Queries

How you extract quantitative

information

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VisIt Tutorial

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Aneurysm Simulation

  • Provides “pressure” and “velocity” information for each time step
  • SILO file format
  • Large amount of time steps
  • Static Analysis → for a single time step
  • Transient Analysis → over time

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