Software Alternatives, Accelerators & Startups

ANSYS Fluent VS OpenFOAM

Compare ANSYS Fluent VS OpenFOAM and see what are their differences

ANSYS Fluent logo ANSYS Fluent

ANSYS engineering simulation and 3D design software delivers product modeling solutions with unmatched scalability and a comprehensive multiphysics foundation.

OpenFOAM logo OpenFOAM

OpenFOAM® - Official home of The Open Source Computational Fluid Dynamics (CFD) Toolbox.
  • ANSYS Fluent Landing page
    Landing page //
    2023-01-26
  • OpenFOAM Landing page
    Landing page //
    2021-08-02

ANSYS Fluent features and specs

  • Comprehensive Physics Modeling
    ANSYS Fluent offers extensive modeling capabilities encompassing fluid dynamics, heat transfer, turbulence, and various multiphase flows, enabling accurate simulations across a wide range of applications.
  • High Accuracy
    With advanced numerical algorithms, Fluent provides highly accurate results, which are validated across numerous industries and academic studies.
  • User-friendly Interface
    The software features a user-friendly graphical interface, making it easier for both beginners and experienced users to set up and analyze simulations.
  • Extensive Post-Processing Tools
    Fluent includes a suite of post-processing tools that allow users to visualize and analyze simulation results in detail through contour plots, vector plots, and animations.
  • Strong Technical Support and Community
    ANSYS offers extensive documentation, tutorials, and customer support, as well as an active user community that can help with troubleshooting and learning.
  • Scalability
    Fluent is highly scalable and can run on a wide range of platforms, from personal workstations to high-performance computing clusters, making it suitable for different project sizes.

Possible disadvantages of ANSYS Fluent

  • Cost
    ANSYS Fluent is a high-end software, often accompanied by significant licensing fees, which may not be affordable for smaller companies or individual users.
  • Steep Learning Curve
    Despite its user-friendly interface, the comprehensive features and advanced functionalities of Fluent can result in a steep learning curve for new users.
  • Resource Intensive
    Running complex simulations in Fluent can be computationally demanding, requiring significant processing power and memory, which might necessitate high-performance computing resources.
  • Dependency on Accurate Input
    The accuracy of Fluent simulations is heavily dependent on the quality of input data and initial conditions, which means that inaccurate or insufficient input can lead to unreliable results.
  • Occasional Stability Issues
    Users sometimes report stability issues or crashes during large, complex simulations, which can disrupt workflow and require troubleshooting.

OpenFOAM features and specs

  • Open Source
    OpenFOAM is free to use and its source code is openly available under the GPL license, allowing for extensive customization and transparency in computational fluid dynamics (CFD) simulations.
  • Extensibility
    Users can extend and modify the functionality of OpenFOAM to suit specific needs or integrate new algorithms, making it highly adaptable to various projects and research requirements.
  • Community and Support
    A robust community of users and developers contributes to forums, documentation, and collaboration, providing substantial peer support and shared knowledge.
  • Versatility
    OpenFOAM supports a wide range of physical models and simulation types, from simple incompressible flow to complex multiphase flows and chemical reactions, making it suitable for diverse applications.
  • Parallel Computing
    Optimized for parallel processing, OpenFOAM can run efficiently on high-performance computing systems, thereby handling large-scale simulations effectively.

Possible disadvantages of OpenFOAM

  • Steep Learning Curve
    OpenFOAM requires a significant investment of time to learn and master, as it involves understanding complex physics, programming concepts, and software-specific syntaxes.
  • Limited GUI
    Unlike some commercial CFD software, OpenFOAM lacks a sophisticated graphical user interface (GUI), necessitating users to rely on command-line input and scripting for setup and execution of simulations.
  • Documentation Quality
    Although community-driven, the documentation can sometimes be incomplete or outdated, making it challenging for new users to find reliable and up-to-date instructions and tutorials.
  • Performance Variation
    Performance and stability can vary depending on the specific simulation setup and hardware used, which may require users to conduct extensive testing and optimization.
  • Dependency Management
    Installing and maintaining OpenFOAM and its dependencies can be complex, often requiring specific versions of libraries and compilers to ensure compatibility and optimal performance.

ANSYS Fluent videos

ANSYS Fluent: Overview of the Mapped Interface Technique for CHT Simulations

OpenFOAM videos

What is OpenFoam? | Skill-Lync

More videos:

  • Tutorial - How to run your first simulation in OpenFOAM® - Part 1 - tutorial
  • Tutorial - CFD tutorial for beginners | What is OpenFOAM? | SKILL-LYNC

Category Popularity

0-100% (relative to ANSYS Fluent and OpenFOAM)
Numerical Computation
57 57%
43% 43
Technical Computing
56 56%
44% 44
Simulation Software
59 59%
41% 41
CFD
60 60%
40% 40

User comments

Share your experience with using ANSYS Fluent and OpenFOAM. For example, how are they different and which one is better?
Log in or Post with

Social recommendations and mentions

Based on our record, OpenFOAM seems to be a lot more popular than ANSYS Fluent. While we know about 19 links to OpenFOAM, we've tracked only 1 mention of ANSYS Fluent. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

ANSYS Fluent mentions (1)

  • Cannot access the ansys.com website (Access denied)
    I live in Iraq and whenever I try to access "ansys.com", I get the error. Source: over 2 years ago

OpenFOAM mentions (19)

  • OpenFOAM on Debian 12
    In openfoam.org, there is not compiled binaries for Debian (any version). So one should install it using docker (I prefer to do not use it) or by compiling the code from the source. I consider compiling from source, but I do prefer binaries. Source: almost 2 years ago
  • Please help me get running OpenFOAM
    Hello I am a mechanical engineering student in my last year. So I made the wisest decision to learn OpenFOAM. But there is the catch. I have no idea how to use Linux or how to emulate Linux on Windows 10. I found a lot of videos on Youtube how to download an start OpenFOAM but every one of them was using different methods each time so I got confused. Can anyone please help or direct me? Thank you for your answers... Source: about 2 years ago
  • Step by Step (Written not Video) Tutorial for FEM with Air
    As far as air flow simulation, I got slightly farther with Open Foam than I did in FreeCAD directly. Still, I got in way over my skill level and stopped before getting anything useful. Source: about 2 years ago
  • Open source FEA tools instead of ANSYS Workbench and APDL
    There are two versions of openfoam, one closed source (which is the one I linked to in my original comment, my apologies about that) and the open source version. But what you're describing makes it sound like fenics might be your best option. Source: over 2 years ago
  • command not found and looping
    I suggest you install per the instructions at openfoam.com or openfoam.org instead of using apt. Source: over 2 years ago
View more

What are some alternatives?

When comparing ANSYS Fluent and OpenFOAM, you can also consider the following products

SimScale - SimScale makes high-fidelity engineering simulation truly accessible. From anywhere. At any scale. In the cloud.

MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming

Wolfram Mathematica - Mathematica has characterized the cutting edge in specialized processing—and gave the chief calculation environment to a large number of pioneers, instructors, understudies, and others around the globe.

SimFlow - SimFlow is a powerful CFD software, focused on engineering and science.

COMSOL Multiphysics - COMSOL is the developer of COMSOL Multiphysics software, an interactive environment for modeling and simulating scientific and engineering problems.

Simscale CFD - SimScale CFD is a cloud-based leading CAE platform that offers access to CFD, FEA, and thermodynamics simulation capabilities 100% via a standard web browser.