Overview
There are two ways to postprocess CFD results from FLUENT
– FLUENT postprocessing tools – legacy tools integrated in the FLUENT solver.
– ANSYS CFD-Post application – a state-of-the-art postprocessor for ANSYS CFD products. CFD-Post can run as a standalone postprocessor, or within Workbench
Both postprocessors include many tools for analyzing CFD results
– Isosurfaces
– Vector Plots
– Contour plots (shaded and graded)
– Streamlines and pathlines
– XY plotting
– Animation creation
Contains the ability to postprocess any user-defined quantity either defined through custom field functions or user-defined memory (UDF).
Postprocessing in FLUENT
Many post processing tools are available in FLUENT:
– Surface creation
– Display types
– Rendering options
– Plots of solution data
– Flux reports and Integral calculations
Post processing functions typically operate on surfaces, which can be automatically created by FLUENT from existing zones or by the user.
For more information, please refer to the web-based lecture, “Post-Processing in FLUENT” on the FLUENT User Services Center www.fluentusers.com
Surface Creation
Fluent allows you to select portions of the CFD domain, called surfaces, to be used for visualizing and plotting the flow field.
There are a variety of ways to create surfaces:
– Zone surfaces (surfaces automatically created by solver from zones)
– Plane surfaces (specifying a specific plane in the domain)
– Iso-surfaces (surfaces that have constant value for a specified variable)
– Clipping Surfaces (iso-surfaces trimmed within specified range of values)
– Point surfaces (specifying a particular location in the domain)
– Line and Rake Surfaces (used for display of particle path lines)
Surfaces can be renamed, deleted or moved and used to write profile files.
Post-Processing Rendering Options
The rendering options in FLUENT allow control of the look-and-feel of the post-processing plots, including:
– Views and display options
– Colormaps for contour/vector plots
– Shading on surfaces using Lights
– Annotation of plots
– Surface manipulation
– Scene Composition using plot overlays, different colors, shading, transparency
– Scene animation (fly throughs)
Plots
FLUENT provides tools to generate data plots of the solution:
– XY plots of solution variables
– Histograms to illustrate frequency of distribution
– Fast Fourier Transforms (FFT)
– Residuals
You can modify the colors, titles, legend, axis and curve attributes to customize your plots.
Other data files (experimental, computational) can also be read in to compare results.
Reports
Flux reports
– Net flux is calculated.
– Total Heat Transfer Rate includes radiation.
Surface integrals
– slightly less accurate on user-generated surfaces due to interpolation error.
Volume integrals
Postprocessing with CFD-Post
Starting CFD-Post
Within ANSYS Workbench
– Drag the CFD-Post icon in the Component Systems list to the project tree.
– OR, create a standalone CFD-Post session.
From the Start Menu or Command Line
– Start > Programs > ANSYS 12.0 > ANSYS CFD-Post
CFD-Post can also be started from the CFX-Solver Manager or the CFX Launcher
GUI Layout
No comments:
Post a Comment