JP
Paint-based modeling
Build simulation domains and boundary conditions with intuitive image inputs.
The Easiest Computational Fluid Dynamics Software
No CAD or mesh generation required / Flowsquare+ 2026R1.0
The easiest fluid simulation software for Windows
Flowsquare+ lets users create simulation domains and boundary conditions with paint-like inputs, then visualize velocity, temperature, and scalar fields while the simulation is running. Easily perform a wide range of fluid flow and heat transfer simulations, including vehicle aerodynamics, indoor airflow, and thermal analysis.
- Free Trialstart testing immediately
- Commercial UseProfessional from JPY 10,450/month
- Easy Inputno CAD or mesh generation
Concept
Turning complex CFD into approachable work
Typical CFD workflows often require CAD preparation, mesh generation, boundary condition setup, and post-processing expertise. Flowsquare+ integrates model construction, simulation, and visualization into one lightweight environment.
Users can define boundary conditions with images, import STL geometry, and visualize velocity, temperature, and scalar fields while the simulation is running.
Unlike conventional CFD workflows, Flowsquare+ does not require separate CAD software, mesh-generation software, or a manual mesh-generation step. Users can create relatively complex three-dimensional geometry using only the standard Windows Paint application through its proprietary interface. CAD-designed models can also be imported in STL format and used for simulation without separate preprocessing.
Proprietary interface: Japanese Patent No. 6813826
3D CAD support
STL geometry can be used directly in simulation workflows.
In-situ visualization
Understand the evolving flow field as the calculation proceeds.
For learning and practice
Useful for education, research, and early engineering studies.
Technical Entry
Explore the functions and workflow
Review CFD basics, input data preparation, STL model handling, result visualization, and simulation settings.
CFD Basics
Introductory concepts behind fluid simulation and what CFD solves.
Basics of Flowsquare+Key features of Flowsquare+ simulations, including image inputs, boundary conditions, and domains.
Simulation WorkflowBasic steps from preparing input files to running a simulation and reviewing results.
Bitmap-Based Model ConstructionHow to define simulation domains and boundary conditions from paint-style bitmap images.
STL Model Input and OptimizationHow to prepare 3D geometry data and adjust shapes for practical simulations.
VisualizationReview streamlines, particles, velocity, pressure, temperature, and other results.
Input ParametersSettings for calculation conditions, boundary conditions, visualization, and simulation control.
Simulation Movie
Simulation result example
A visualization example of flow and temperature fields calculated with Flowsquare+.
Use Cases
User Cases in Industry, Research, and Education
Use cases, published papers, and press materials related to Flowsquare+.
Industry
Best Planning, Inc.
Air conditioning analysis and performance evaluation of residential air conditioning systems using Flowsquare+.
Residence S Residence N Residence B Residence OCustom Development
Aquatic Zone Network Co., Ltd.
Customized Flowsquare+ for environmental simulations and online statistical processing considering resistivity of windbreak fences.
Custom Development
Panasonic Corporation
Customized Flowsquare+ for coupled simulations of fluids and other physical phenomena.
International Publication
HRI 2026
Estimating mobile robot waiting locations using fluid simulation without prior observation.
R. Sakaki et al., Estimation of Mobile Robot Waiting Locations using Fluid Simulation without Prior Observation.
doi:10.1145/3757279.3785561International Publication
Lab on a Chip, 2025
A microfluidic method for in-situ molecular analysis of organelles.
Y. Umeda et al., Microfluidic cell unroofing for the in situ molecular analysis of organelles.
doi:10.1039/D5LC00102AInternational Publication
Drones, 2023
Analysis of how wind affects drone relay communications.
Y. Tajima et al., Analysis of Wind Effect on Drone Relay Communications.
doi:10.3390/drones7030182Press / COVID-19
COVID-19 related use cases
Studies and press coverage on airborne transmission and space shielding by plastic sheets.
UEC QLifeProExamples
Simulation Examples
Download
Download Flowsquare+
Please read and agree to the license agreement and disclaimer before downloading Flowsquare+.
Latest version: Flowsquare+ 2026R1.0
Recommended Specification (basic)
- OS: Windows 11
- RAM: 8GB or more
- CPU: Core i5 / Ryzen 5 or above
- Storage: 10GB or more free space
- Display resolution: Full HD (1920x1080) or higher
Recommended Specification (advanced)
- OS: Windows 11
- RAM: 32GB or more
- CPU: Core i7 / i9, Ryzen 7 / 9 or above
- Storage: 50GB or more free space
- Display resolution: Full HD or higher
Read the software license agreement and disclaimer
Software License Agreement
Flowsquare+ is provided under multiple types of individual licenses. Immediately after installation, a Trial license intended solely for evaluation and verification purposes, and not for commercial use, is assigned. Any individual license other than the Trial license must be issued separately for each user. Publication, reproduction except for backup copies, sale, rental, sublicensing, transfer, assignment, or any other transfer of rights related to the license or license file is strictly prohibited. Obtaining licenses through fraudulent or unauthorized means is also prohibited.
Disclaimer
The developer shall not be liable for any damages arising from the use of this software, whether direct or indirect. Users shall use the software at their own responsibility and risk. Although minimum operational testing has been conducted, the developer makes no guarantees regarding the operation, performance, or accuracy of the software. Before purchasing a paid license, users are strongly advised to conduct sufficient verification and testing using the free Trial license.
Warning message when downloading
When downloading the file, your browser may show a warning that the file is not commonly downloaded and may be dangerous. Please select continue or save to complete the download.
Warning display when launching for the first time
When launching Flowsquare+ for the first time, Windows SmartScreen may show a warning. Click More info, then Run anyway.
Previous versions are available below.
License
License
Licenses are available for evaluation (Trial), commercial use (Professional), and students (Student). Paid licenses can be purchased by invoice payment or issued online.
For invoice payment, group licensing, customization, or technical service inquiries, please contact us.
Services
Consulting, custom development, and CFD services
In addition to Flowsquare+ support, Nora Scientific provides technical consulting, CFD analysis, input-data preparation, custom development, and hands-on training for practical engineering problems.
Technical Consulting
One-time, recurring, and long-term consulting for analysis strategy, modeling, boundary conditions, result interpretation, and software adoption.
CFD Analysis and Input Data
Contract analysis using Flowsquare+ or other CFD software, including boundary-condition setup, input-data preparation, and result reporting.
Custom Development
Customization of Flowsquare+, feature development for specific applications, and integration with internal tools or engineering workflows.
Hands-on Training
Practical seminars designed around the user's field, data, and engineering objectives.
Support
Support
Find setup information, usage guidance, technical answers, and development updates.
Team
The Team
Flowsquare+ is developed and provided by Nora Scientific. The project aims to make fluid dynamics more approachable through easy-to-use simulation software.
Yuki Minamoto, PhD
Yuki received his BEng and MEng from Tokyo Institute of Technology, and his PhD from University of Cambridge. After a postdoctoral researcher appointment at Sandia National Laboratories, he joined Tokyo Institute of Technology as a tenure-track assistant professor before founding Nora Scientific.
He is currently a visiting associate professor at The University of Electro-Communications. His research and development interests include computational fluid dynamics, mathematical optimization, and quantum-inspired computational technologies.
personal web
Hirotaka Cooper
Hirotaka received his BEng and MEng from Tokyo Institute of Technology. At graduate school, he worked on numerical simulations in the field of computational nonlinear dynamics.
His in-depth knowledge of computer science and numerical computation contributes to various aspects of Flowsquare+ development.
Thermo-fluid dynamics is closely related to industrial products and natural and urban environments, but understanding and analyzing these phenomena is generally difficult.
Flowsquare+, developed by Nora Scientific, is an inexpensive and easy-to-use fluid dynamics analysis tool used by companies, researchers, and educational institutions in Japan and abroad.