•A brief introduction to FLUENT user-defined
functions
•Overview of FLUENT Data Structure and Macros
•Two Examples
•Where to get more information and help
•UDF Support
•What is a User Defined Function?
–A UDF is a
function (programmed by the user) written in C which can be dynamically linked
with the FLUENT solver.
•Standard C functions
–Trigonometric,
exponential, control blocks, do-loops, file i/o, etc.
•Pre-Defined Macros
–Allows access to
field variable, material property, and cell geometry data and many utilities
•Why program UDFs?
–Standard
interface cannot be programmed to anticipate all needs:
•Customization of boundary conditions, source
terms, reaction rates, material properties, etc.
•Customization of physical models
•User-supplied model equations
•Adjust functions (once per iteration)
•Execute on Demand functions
•Solution Initialization
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