CFX-Intro 14.5 Appendix B Profile BCs
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Transcript of CFX-Intro 14.5 Appendix B Profile BCs
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8/13/2019 CFX-Intro 14.5 Appendix B Profile BCs
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2012 ANSYS, Inc. December 21, 2012 1 Release 14.5
14. 5 Release
Introduction to ANSYS
CFX
Appendix B
Profile Boundary Conditions
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2012 ANSYS, Inc. December 21, 2012 2 Release 14.5
Introduction
Lecture Theme:
Rather than using constant values of variables (velocity, pressure, temperature,etc), it is more accurate to use experimental results and create profile boundary
conditions based on interpolation of values from data files
Another option is to create a profile boundary from results at some location in a
previous simulation
Learning Aimsyou will learn:
Output methods for Profile Boundary Conditions
Importing Profiles, and profile format
Visualization of imported profiles
Learning Objectives:
To be able to use obtained data for highest accuracy CFD boundary conditions
Introduction CFD Data Other Data Application Usage
Profile
Data File
Results File
from First
Simulation
Solver File
containing
new input
data
CFD-Post CFX-Pre
Experimental Data Formatting
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Using Previous CFD Data
Profile
Data File
Results
File from
First
Simulation
Solver File
containing
new inputdata
CFD-Post CFX-Pre
Inlet Velocity
Outside Temperature
Pressure Profile
Relative Pressure
Relative Static Pressure
Static Temperature
Stationary Frame Total Temperature
Total Temperature
User Defined Variables
Introduction CFD Data Other Data Application Usage
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2012 ANSYS, Inc. December 21, 2012 4 Release 14.5
Using Other Data
Profile
Data File
Experimental
Data
Solver File
containing
new inputdata
CFX-PreFormatting
Example of a valid Profile file. Note that the header information [Name],
[Spatial Fields] and [Data] must be entered correctly for the profile to be
valid. More details are available in the documentation
Introduction CFD Data Other Data Application Usage
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2012 ANSYS, Inc. December 21, 2012 5 Release 14.5
Import into CFX-Pre
Initialize (read in) the profile in CFX-Pre. This is done by selectingTools>Initialize Profile Data and selecting the profile file. You can load
multiple profile files and each can be applied in more than one location
Introduction CFD Data Other Data Application Usage
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Applying Profile
Assign the profile data to a boundary
condition Select the appropriate profile from
the drop-down list, then click
Generate Values
The Boundary Details panel will be
modified to use the profile data
These changes will not be appliedunless you click Apply
Tip: you can shift a profile bymodifying the x, y, z values passedinto the function, e.g.
in1.Velocity u(x+10[m],y,z)
Introduction CFD Data Other Data Application Usage
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Visualization
Boundary conditions can bevisualized in CFX-Pre
You can create a Boundary Contouror a Boundary Vector plot of theprofile data
Introduction CFD Data Other Data Application Usage
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Usage
The profile data is read into the CFX-Solver each time the solver isstarted or restarted
(i.e. the profile file can be edited between solver runs without returning toCFX-Pre
CFX-Solver
CFX-Pre
CFD-Post
.def & .csv
.res
Introduction CFD Data Other Data Application Usage
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