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CFD.NINJA is a group founded in 2014, since then we have been dedicated to the research and dissemination of topics related to Computational Fluid Dynamics (CFD) for which we use various CFD simulation software such as ANSYS FLUENT, ANSYS CFX, ANSYS MESHING, ANSYS ICEM CFD, OpenFoam, DesignModeler, SpaceClaim, Rocky DEM, Autodesk Inventor, Ensight, etc.
We invite you to subscribe to our youtube channel, Facebook page, Twitter and Instagram where we share monthly ANSYS CFD tutorials. Eventually, we do a giveaway for CFD books and gift cards where our subscribers participate.



More than 150 Free Tutorials using Ansys Fluent, Ansys CFX, Ansys Meshing, DesignModeler, SpaceClaim, Autodesk Inventor, ICEM CFD.

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CFD.NINJA Tutorials

We have a large number of tutorials that we have developed over several years and we make them available to you. In many of them, you can download files, geometries, and meshes. Soon we will be uploading more tutorials for experts and beginners of ANSYS CFD. We hope you can share this website with your friends and colleagues.

Source: Ansys
Computational fluid dynamics (CFD) is a tool with amazing flexibility, accuracy and breadth of application. But serious CFD, the kind that provides insights to help you optimize your designs, can be out of reach unless you choose your software carefully. To get serious CFD results, you need serious software. Ansys CFD goes beyond qualitative results to deliver accurate quantitative predictions of fluid interactions and trade-offs. These insights reveal unexpected opportunities for your product — opportunities that even experienced engineering analysts can miss.

Ansys Fluent Tutorials

Source: Ansys

Fluent software contains the broad, physical modeling capabilities needed to model flow, turbulence, heat transfer and reactions for industrial applications. These range from air flow over an aircraft wing to combustion in a furnace, from bubble columns to oil platforms, from blood flow to semiconductor manufacturing and from clean room design to wastewater treatment plants. Fluent spans an expansive range, including special models, with capabilities to model in-cylinder combustion, aero-acoustics, turbomachinery and multiphase systems.

Ansys Fluent | Hydraulic Jump

Free surface is the surface of a fluid that is subject to zero parallel shear stress, such as the interface between two homogeneous fluids, for example, liquid water and the air in the Earth's atmosphere. Unlike liquids, gases cannot form a free surface on their...

Ansys Fluent – Centrifugal Pump (Impeller)

A centrifugal pump is a mechanical device designed to move a fluid by means of the transfer of rotational energy from one or more driven rotors, called impellers. Fluid enters the rapidly rotating impeller along its axis and is cast out…

Ansys Fluent | How to Plot Graph? | XY Plot

In this tutorial, you will learn how to generate an XY Plot and save its picture (Post-Processing) using Ansys Fluent.

Ansys Fluent – Fluidized Bed

A fluidized bed is a physical phenomenon occurring when a quantity of a solid particulate substance (usually present in a holding vessel) is placed under appropriate conditions to cause a solid/fluid mixture to behave as a fluid.

Ansys CFX Tutorials

Source: Ansys

Ansys CFX is a high-performance computational fluid dynamics (CFD) software tool that delivers reliable and accurate solutions quickly and robustly across a wide range of CFD and multiphysics applications. CFX is recognized for its outstanding accuracy, robustness and speed when simulating turbomachinery, such as pumps, fans, compressors and gas and hydraulic turbines.

Ansys CFX – How to add new material?

By default, your local materials list will include a single fluid material (air) and a single solid material (aluminum). If the fluid involved in your problem is air, you can use the default properties for air or modify the properties.

Ansys CFX – Import Pressure to Ansys Mechanical (FSI)

Fluid-structure interaction (FSI) is the multiphysics study of how fluids and structures interact. The fluid flow may exert pressure and/or thermal loads on the structure. These loads may cause structural deformation significant enough to change the fluid flow itself.

Ansys CFX – Flow around a Cylinder / Parameters DesignPoint (DP)

External flows past objects have been studied extensively because of their many practical applications. For example, airfoils are made into streamline shapes in order to increase the lifts, and at the same time, reducing the aerodynamic drags exerted on the wings.

Ansys CFX – NACA Airfoil 4412

During the late 1920s and into the 1930s, the NACA developed a series of thoroughly tested airfoils and devised a numerical designation for each airfoil — a four digit number that represented the airfoil section’s critical geometric properties.

Ansys CFX – NACA 4412 (Structured Mesh)

Ansys CFX – NACA 4412 (Structured Mesh)

Source: NASA The NACA four-digit wing sections define the profile by:[1] First digit describing maximum camber as percentage of the chord. Second digit describing the distance of maximum camber from the airfoil leading edge in tenths of the chord. Last two digits...



Source: CFD Direct OpenFOAM is the free, open source CFD software developed primarily by OpenCFD Ltd since 2004. It has a large user base across most areas of engineering and science, from both commercial and academic organisations. OpenFOAM has an extensive range of...

Ansys Meshing Tutorials

Source: Ansys

Meshing is an integral part of the engineering simulation process where complex geometries are divided into simple elements that can be used as discrete local approximations of the larger domain. The mesh influences the accuracy, convergence and speed of the simulation. Furthermore, since meshing typically consumes a significant portion of the time it takes to get simulation results, the better and more automated the meshing tools, the faster and more accurate the solution.

Ansys provides general purpose, high-performance, automated, intelligent meshing software which produces the most appropriate mesh for accurate, efficient multiphysics solutions — from easy, automatic meshing to highly crafted mesh. Methods available cover the meshing spectrum of high-order to linear elements and fast tetrahedral and polyhedral to high-quality hexahedral and Mosaic. Smart defaults are built into the software to make meshing a painless and intuitive task delivering the required resolution to capture solution gradients properly for dependable results.

Ansys Meshing – Sizing

By default, Use Adaptive Sizing is set to Yes, unless Physics Preference is set to CFD or Nonlinear Mechanical (in which case the default is Capture Curvature set to Yes),

Ansys Meshing – Hexahedral Mesh

The MultiZone mesh method provides automatic decomposition of geometry into mapped (structured/sweepable) regions and free (unstructured) regions. It automatically generates a pure hexahedral mesh where possible and then fills the more difficult to capture regions with unstructured mesh.

Ansys Meshing – Section Plane

Meshing is an integral part of the engineering simulation process where complex geometries are divided into simple elements that can be used as discrete local approximations of the larger domain. The mesh influences the accuracy, convergence and speed of the simulation.

Ansys Meshing – CutCell

The CutCell meshing process involves the following approach:
Objects, material points (optional), and size functions are defined.
The initial size of the Cartesian grid is computed based on the minimum and maximum size set for the size functions.

Ansys Meshing | Inflation

Ansys Meshing | Inflation

Source: Ansys You can set the Use Automatic Inflation control so that inflation boundaries are selected automatically depending on whether or not they are members of Named Selections groups. The following options are available: None Program Controlled All Faces in...

Ansys Meshing – Keyframe Animation

Ansys Meshing – Keyframe Animation

Source: Ansys You can make animations based on keyframes. Keyframes define the start and endpoints of each section of animation. Keyframes are linked together by drawing a number of intermediate frames, the number of which is set by the # of Frames field in the...

Ansys DesignModeler Tutorials

Ansys DesignModeler – Freeze & Unfreeze

The Freeze feature is an advanced modeling tool available from the Tools Menu. Freeze has two applications: it allows for an alternative method for assembly modeling with multiple body parts.

Ansys DesignModeler – Projection vs Imprint Face

The Projection feature allows you to project points on edges/faces and edges on faces/bodies. This feature can be executed on both frozen and active bodies.

Ansys DesignModeler – Imprint Face

Similar to Slice, Imprint Faces imprints curves onto the faces of active bodies in the model. The bodies themselves are not split into multiple pieces. It is available whenever active bodies are present.

Ansys DesignModeler – Edge Split

The Split Edges feature allows for the splitting of edges (including Line body edges) into two or more pieces. The edges selected for the operation can come from either active or frozen bodies.

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