In this lecture, we will establish the theoretical and analytical background for turbulent pipe flow. We begin with the turbulence fundamentals, analytical equations, and empirical correlations for calculating the friction factor (f), skin friction coefficient (Cf), and pressure drop. The velocity profile will also be estimated empirically to provide a benchmark for CFD results. Next, we calculate the required near-wall mesh size based on y+ values of 1 and 10, including the determination of baseline parameters such as friction velocity and boundary layer thickness. Finally, we summarize the expected results of the simulation—velocity profiles, pressure losses, and friction factor—which will guide the practical CFD setup in the following lectures.

In this lecture, we move from theory into the practical CFD workflow. We will create the pipe geometry, generate an appropriate mesh, and prepare the case setup in ANSYS Fluent. The importance of mesh refinement near the wall will be highlighted by relating it to the y+ values calculated earlier. To demonstrate the workflow efficiency, we will start from the laminar pipe flow case and modify the geometry and mesh to quickly transition into a turbulent case setup. Preliminary simulation runs will be performed to check solution convergence and ensure the model is correctly capturing the flow physics.

This lecture focuses on analyzing and interpreting the CFD results. We will extract velocity profiles, axial velocity distributions, and pressure variation along the length of the pipe. Using these results, the friction factor and coefficient of friction will be determined and compared with theoretical and empirical predictions. A mesh independence study will be carried out to evaluate solution accuracy, followed by a comparison of different turbulence models and their sensitivity to y+ values. Finally, we will compare meshing approaches in ANSYS Meshing and ICEM CFD, discussing their effect on accuracy and computational efficiency.

In this lecture you will learn that how to split the domain of airfoil into four parts so that we can make hexa mesh (aka Mapped meshing) for the airfoil. 

In this lecture, I have highlighted the common problems faced by students while importing the airfoil coordinates into design modeler. I have also uploaded the airfoil file with and without correction and also excel file in this lecture.

In this tutorial, you will learn how to perform a complete CFD simulation of the NACA 4412 airfoil in ANSYS CFX using the SST turbulence model at 0° Angle of Attack (AoA). This workshop is designed to teach practical aerodynamic simulation techniques used in aerospace and engineering applications.

The tutorial covers the complete CFD workflow from mesh import to post-processing and aerodynamic coefficient evaluation.

What You Will Learn

• Importing Fluent 2D mesh into ANSYS CFX

• Extruding mesh by one cell for quasi-2D simulation

• Setting up material properties and boundary conditions

• Configuring SST turbulence model in CFX

• Creating coordinate frames for AoA studies

• Defining lift and drag coefficient expressions

• Monitoring convergence during runtime

• Optimizing solver settings and time scale factor

• Running the simulation in ANSYS CFX Solver

• Initializing solutions for faster convergence

• Creating velocity and pressure contour plots

• Y+ contour visualization and vector plots

• Creating polylines for Cp plotting

• Plotting pressure coefficient (Cp) distribution over the airfoil surface

Software Used

• ANSYS CFX 2024 R2

• CFD-Post

• ICEM CFD / Fluent Mesh

This tutorial is useful for:

• Aerospace engineering students

• CFD beginners and intermediate users

• Researchers working on airfoil aerodynamics

• Engineers learning ANSYS CFX professionally

• Students preparing academic and research projects

By the end of this workshop, you will understand how to perform a professional-quality airfoil simulation in ANSYS CFX and extract meaningful aerodynamic results such as lift, drag, and Cp distribution.