Easiest Fluid Simulation Software

Flowsquare+ is a two- and three-dimensional computational fluid dynamics (CFD) software, which has a very handy and intuitive user interface which allows more users to perform their own simulations without too much cost and effort.

Flowsquare+ is available with free or very cheap lincenses, and runs on typical Windows PCs. You don't need to have professional skills to use Flowsquare+. Also, its real-time visualization tools help to understand the flow evolution more intuitively. Anyone can perform their own CFD with Flowsquare+ !

A simulation of room AC visualized by tracer particle coloured based on temperature.



Performing CFD couldn't be easier with Flowsquare+! Your can construct a model based on a few illustrations generated using a paint software such as Microsoft Paint, thanks to its unique algorithm*. Of course, a CAD desinged model can be used for a simulation without any pre-processing such as mesh generation!

Flowsquare+ can be applied to thermofluid problems such as heating/cooling of devices and rooms, and concentration transport problems of a substance such as pollutant dispersion, as well as typical fluid flow related problems. Flowsquare+ also includes many visualization and post-analysis tools, being an easy-to-use, integrated CFD tool.

* PAT. 6813826


Usage Examples

  • International Journal Publications, where Flowsquare+ is utilised:
    • Y. Ishigaki, S. Yokogawa, Y. Minamoto, A. Saito, H. Kitamura, Y. Kawauchi, Pilot Evaluation of Possible Airborne Transmission in a Geriatric Care Facility Using CO2 Tracer gas: A Case Study, JMIR Formative Research, 6 (12):e37587 (2022). doi:10.2196/37587
    • J. Inoue, K. Sato, Toward sustainable meteorological profiling in polar regions: Case studies using an inexpensive UAS on measuring lower boundary layers with quality of radiosondes, Environmental Research, 205, 112468 (2021), doi:10.1016/j.envres.2021.112468
    • M. Simka, P. Latacz, Numerical modeling of blood flow in the internal jugular vein with the use of computational fluid mechanics software. Phlebology, 36 (7), 541-548 (2021). doi:10.1177/0268355521996087
    • J. Inoue, Y. Tobo, K. Sato, F. Taketani, and M. Maturilli, Application of cloud particle sensor sondes for estimating the number concentration of cloud water droplets and liquid water content: case studies in the Arctic region, Atmospheric Measurement Techniques, 14, 4971-4987 (2021). doi:10.5194/amt-14-4971-2021



Flowsquare+ was developed and optimised for 64-bit Windows PC/laptops. Before downloading Flowsquare+, please read the license agreement and disclaimer.

Software License Agreement
There are followig license types for Flowsquare+ (the Software): Trial, Two-D, PRO (1 and 12 months) and Student licenses. With any of these license types, the users can use the software for non-commercial and for commercial purposes. Initially, the Software is alotted with the Trial lincense. To use the Software under a non-Trial license, each user must issue their own lincense, and borrowing and lending, sublicensing, assignment of the license in any form is prohibited.

The developer of Flowsquare+ (the Software) makes no implied or express warranties about the reliability of the Software. The developer of the Software is not responsible for any damages caused by or resulting from the use of the Software.

Recommended Specification (basic)
  • OS: Windows 10/11 (64bit)
  • RAM: 4GB or more
  • CPU: Core i5 or above, Ryzen 5 or above
  • Display resolution: Full HD (1920x1080) or more
Recommended Specification (advanced)
  • OS: Windows 10/11 (64bit)
  • RAM: 16GB or more
  • CPU: Core i7 or above, Ryzen 7 or above
  • Display resolution: Full HD (1920x1080) or more
Latest version: 2022R3.3 (Previous versions)
Warning message (downloading) | Warning display (executing)

Download previous versions

  1. 2022R2.0
  2. 2021R3.0
  3. 2020R2.0

About the warning message when downloading

When you try to download a file distributed on this site using Google Chrome or other applications, you may receive a warning message that says, "this file is not commonly downloaded and may be dangerous". Please select "Continue (save)" to complete the download.

Warning message when downloading.
Warning message when downloading.

This warning appears to be displayed in the following cases:

  • The file includes applications in Windows executable file format (.exe).
  • The file is treated as a minor file with a small number of actual downloads.

About warning display at software startup

After downloading Flowsquare+, you may see a warning message "Your PC has been protected by Windows" at the first time of execution. In this case, please click "More Info" and then "Run anyway" as shown in the following figures.

This warning is displayed by Windows SmartScreen, which is a dialog that is displayed when Microsoft has not been able to confirm the safety of the software, but due to the fact that Microsoft has not kept up with the confirmation, it is often displayed when Flowsquare+ is launched for the first time.

Warning display at software startup (1).
Warning display at software startup (1).
Warning display at software startup (2).
Warning display at software startup (2).



Please choose one from four license types listed below. If your desirable license type is not listed below, please contact us so we can arrange one for you.

  • Trial (free)
    This is a free trial license, available right after doanloading the software without a license subscription. With Trial lincese, all functions can be used, but output files are saved until 300th step. Also, a logo is displayed on the window.
  • PRO
    The PRO license includes all functions without any timestep limiation for two- and three-dimensional simulations. The license term can be chosen from one month and twelve months.
  • Student (Free)
    This license can be applied by students and it valid for one year. Once expired, the students can re-apply the student license as long as they are students. This license is on par with the PRO license in terms of capability.
Summary of the license types.
Summary of the license types.


The Team

Yuki Minamoto, PhD, personal web
Yuki received his BEng and MEng from Tokyo Institute of Technology, and PhD from University of Cambridge. After a postdoc researcher appointment at Sandia National Laboratories in the US, he joined Tokyo Institute of Technology as an assistant professor, and also founded Nora Scientific Co. Inc.

Hirotaka Cooper
Hirotaka received his BEng and MEng from Tokyo Institute of Technology. At the graduate school, he was engaged in intensive research activities in the field of computatinoal non-linear dynamics. His in-depth knowledge of computer science contributes various aspects of Flowsquare+.

Woof woof!