Easiest Fluid Simulation Software

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

Flowsquare+ runs on ordinary Windows PCs. You can build 2D and 3D models by drawing with paint software (we recommend Microsoft Paint), and in-situ visualization tools help users understand their flow fields intuitively. Flowsquare+ is used in a wide range of fields by users with various backgrounds as a handy fluid flow simulation tool.

First, please see "User Cases" and "Simulation Examples.

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 2D and 3D models based on a few illustrations generated using paint software such as Microsoft Paint, thanks to its unique algorithm*. Of course, a CAD 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


User cases

Use cases that have received permission or requests for listing, as well as published papers and press materials using Flowsquare+.

  • Best Planning, Inc. (Japan)
    Air conditioning analysis and performance evaluation of residential air conditioning systems using Flowsquare+.
  • Aquatic Zone Network Co., Ltd. (Japan)
    Customized version of Flowsquare+ that can perform environmental simulations and various online statistical processes considering resistivity of windbreak fence
  • Panasonic Corporation (Japan)
    Customized version of Flowsquare+ that enables coupled simulations of fluids and other physical phenomena
  • International Journal Publications
    Items in 《.》 are items for which Flowsquare+ is utilized in the research paper.
    • 《Ecological Evaluation of Ancient Humans from Fluid Aspects》
      A. J. Trájer, Ecological evaluation of the development of Neanderthal niche exploitation, Quaternary Science Reviews, 310, 108127 (2023). doi:10.1016/j.quascirev.2023.108127
    • 《Prediction of fluid forces acting on drones》
      Y. Tajima, T. Hiraguri, T. Matsuda, T. Imai, J. Hirokawa, H. Shimizu, T. Kimura, K. Maruta, Analysis of Wind Effect on Drone Relay Communications, Drones 7(3) 182 (2023). doi:10.3390/drones7030182
    • 《Prediction of fluid flow in cerebral veins》
      M. Simka, M. Skuła, G. Bielaczyc, Validation of models of venous outflow from the cranial cavity in the supine and upright body positions, Phlebological Review 30 (1) 8-12(2022). doi:10.5114/pr.2022.131065
    • 《Prediction of the development of droplets in a facility》
      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
    • 《Prediction of flow field in fluid devices》
      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
    • 《Accuracy verification and calibration of mathematical models related to heat transfer》
      C. Marcel, J. Villot, Urban Heat Island index based on a simplified micro scale model, Urban Climate, 39, 100922 (2021). 10.1016/j.uclim.2021.100922
    • 《Prediction of blood flow in the internal jugular vein》
      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
    • 《Flow analysis in cloud particle sensors.》
      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+ use case in the studies related to the spread of COVID-19 infection



Flowsquare+ is 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: 2024R1.1 (Previous versions)
Warning message (downloading) | Warning display (executing)

Download previous versions

  1. 2023R3.0
  2. 2022R3.3
  3. 2021R3.0
  4. 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 a license type 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 downloading the software without license subscription for testing purpose. 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 before starting Nora Scientific.

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+.
Nora Scientific

Thermo-fluid dynamics is closely related to industrial products and various natural and urban environments, but understanding and analyzing its phenomena are generally difficult. This is because (i) the phenomena are invisible and therefore difficult to understand intuitively, (ii) determining numerical methods and conditions requires a great deal of knowledge, and (iii) performing numerical analysis requires specialized pre- and post-processing.

Flowsquare+, developed by Nora Scientific, is an inexpensive and easy-to-use fluid dynamics analysis tool that is used by many companies and research and educational institutions in Japan and abroad to help understand fluid dynamics.

It's a very cool piece of software! Thank you for bringing it to the world.
Anonymous user