Lesson plan
PLOT3D file format
In computational fluid dynamics, the PLOT3D file format is a standard file format used for storing grid and results data. PLOT3D was created by NASA Ames Research Center in 1982 by Pieter Buning and remains an often used file format. It can only store a structured grid. The structured grid allows random access, that is by knowing the block number, i location, j location, and k location, any grid point value or result value may be extracted. Additionally, given the location of any value, the block number, i location, j location, and k location may be determined. This makes it simple to iterate through a series of volumetric elements and calculate all required properties for the purpose of a CFD analysis. The most basic format includes two different files, a grid file (G-file) and a solution file (Q-file). The filename extensions used vary, though .q is common for Q-files. Grid files may use .g, .x, .xy, or .xyz, among other extensions. The grid file contains the coordinates of the solution grid, while the solution file contains information typical of a CFD solution, flow density, flow momentum (a vector), and flow energy. Data may be stored in either binary or ASCII text format and floating point values may be either single or double precision.…
Article summary
In computational fluid dynamics, the PLOT3D file format is a standard file format used for storing grid and results data. PLOT3D was created by NASA Ames Research Center in 1982 by Pieter Buning and remains an often used file format. It can only store a structured grid. The structured grid allows random access, that is by knowing the block number, i location, j location, and k location, any grid point value or result value may be extracted. Additionally, given the location of any value, the block number, i location, j location, and k location may be determined. This makes it simple to iterate through a series of volumetric elements and calculate all required properties for the purpose of a CFD analysis. The most basic format includes two different files, a grid file (G-file) and a solution file (Q-file). The filename extensions used vary, though .q is common for Q-files. Grid files may use .g, .x, .xy, or .xyz, among other extensions. The grid file contains the coordinates of the solution grid, while the solution file contains information typical of a CFD solution, flow density, flow momentum (a vector), and flow energy. Data may be stored in either binary or ASCII text format and floating point values may be either single or double precision.…
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
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