UDF-User defined function (ANSYS Fluent)

UDF (User-Defined Function) in ANSYS Fluent

Course Type: Learn at Your Pace

UDF (User-Defined Function) in ANSYS Fluent is an industry-standard CFD programming course for practicing engineers.
It starts from basic C programming and then progresses to advanced UDF development inside Fluent.
Therefore, you learn how to write, compile, and hook C-based functions to extend solver capability with custom boundary conditions, source terms, and material models.

Each module links coding concepts to real engineering use. Consequently, you will understand both the “how” and the “why,” and you will be ready to apply UDFs in production CFD projects.

What You Will Learn

• C essentials tailored for ANSYS Fluent users
• UDF structure, build workflow, and solver hooks
• Custom boundary conditions, material properties, and source terms
• Best practices for compiling, debugging, and version control
• Fluent macros for repeatable, professional UDF development

Course Content in Detail

• Introduction
  • Introduction to UDF and Course Overview
• Module 1: Introduction to C Programming
  • Basics of C and syntax
  • Variables, data types, and operators in C
  • Control structures and functions in C
  • Pointers, arrays, and memory management in C
  • File handling (I/O)
• Module 2: Getting Started with UDFs in ANSYS Fluent
  • Structure and syntax of a UDF
  • Writing your first UDF
  • Compiling and hooking UDFs in Fluent
• Module 3: Intermediate UDF Development Techniques
  • Different DEFINE macros in UDF
  • Looping in UDFs
  • Customizing material properties with UDFs
  • Linearizing and adding source terms via UDFs
  • Developing time-dependent UDFs
  • Enhancing boundary conditions with UDFs
  • User-defined memories and scalars
• Module 4: Advanced UDF Applications
  • Multi-phase flow UDFs
  • UDF parallelization
  • UDF for dynamic meshing
• Certificate

Who Should Take This Course

• Practicing CFD engineers who need solver customization
• Researchers building advanced models and UDF-based workflows
• Professionals connecting C programming with Fluent development

Instructor

Dr. Sandeep Mouvanal – Founder of Flowthermolab; PhD (IIT Madras); post-doctoral researcher (University of Nottingham).
He brings extensive experience in solver development and UDF programming for real industrial CFD.