Manuel, A easy data format for your application would be the EnSight binary format:
1) The mesh topology/geometry is stored in a seperate file. (I have seen remarks that it can be a one-time write, however, I write topology and coordinates every time step but "direct" the reader to only read the coordinates -- my mesh distorts with time during execution.)
2) It provides for scalar, vector, and 2nd-order tensor data at each note and in each cell.
3) It stores each point/cell variable vs time in separate files.4) The association between variable name and the data (in its file) takes place in a *case file, see the attached example. (A simple trick: *.case files are ASCII text and easily edited. After two runs, one can write a third *.case file (assuming the geometry files and time stepping is identical) and reference two files with two, new variable names like Velocity-Reference and Velocity-Trial-Algorithm#1 and their respective data files. A delta-Vel difference can be done with ParaView's Calculator filter.)
5) File Format: http://www2.ensight.com/90_manuals/90-UserManual.pdf Chapter 11
If you want to see a Fortran-90 routine that writes EnSight, let me know. Samuel Manuel González wrote:
I am planning to use Paraview to post-process results from my in-housedeveloped simulation software.After reading the “Paraview Guide”, the “File Formats for VTK” and googling data formats, I still find very difficult to select the data format (among those supported by Paraview) which is more appropriate to my needs:- Type of dataset: polygonal mesh. - Time dependent. Topology is constant over time, but geometry (point coordinates) and attributes are not. - Dataset size: 1e5 points, 1e5 lines, 1e5 2D polygons, 2-4 attributes perline and polygon, 100-500 time steps. Of course, I would like to avoid writing the same (constant) topology foreach time step. And it would be great if the topology could be stored in a separate filefrom the rest of the dataset (I often run several simulations for the same topology). I would appreciate any help to select the right data format for this kind of dataset. Best regards, Manuel ********************************************************* Manuel J. Gonzalez Castro Laboratorio de Ingenieria Mecanica University of A Coruña Spain ********************************************************* _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview
FORMAT
type: ensight gold
GEOMETRY
model: 1 1 fmaego.data.geom change_coords_only
VARIABLE
vector per node: 1 1 Displacement fmaego.data.ndis
vector per node: 1 1 Velocity fmaego.data.nvel
vector per node: 1 1 Acceleration fmaego.data.nacc
vector per node: 1 1 Max-Velocity fmaego.data.nvmx
vector per node: 1 1 Min-Velocity fmaego.data.nvmn
scalar per element: 1 1 Material fmaego.data.emat
scalar per element: 1 1 Material-State fmaego.data.esta
scalar per element: 1 1 Pressure fmaego.data.eprs
scalar per element: 1 1 Bulk-Strain fmaego.data.elnv
scalar per element: 1 1 Strain-Energy-Density fmaego.data.esed
scalar per element: 1 1 Effective-Stress fmaego.data.edev
vector per element: 1 1 Stress*Vel fmaego.data.estv
tensor symm per element: 1 1 Stress fmaego.data.estr
TIME
time set: 1
number of steps: 8
time values: 2.000000000000E-06 6.012792808900E-04
1.201367619611E-03 1.801455958332E-03 2.401740597438E-03
3.001759930802E-03 3.601545944376E-03 4.200202866072E-03
FILE
file set: 1
number of steps: 8
<<attachment: samuelkey.vcf>>
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