"Design Analysis is Determined by What You Understand": Professor Daimon, a Pioneer in Space Development, Discusses the True Value of 1D Simulation. Newtonworks Holds Thermal and Energy Management Seminar
Newtonworks Co., Ltd. held a thermal and energy management seminar featuring Professor Yu Daimon of the University of Tsukuba, a leading figure in space development. The seminar highlighted that 1D simulation is not merely a simplified version of 3D, but a strategic tool that enhances the 'resolution of thought' for designers.
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Newtonworks Co., Ltd. (Headquarters: Chuo-ku, Tokyo; President: Toshikazu Yamanashi) held a seminar titled "Why 1D? Learning from Space Development Insights! The Essence of Multi-Physics Modeling and its Application to Thermal and Energy Management" in Kyobashi, Tokyo, on Thursday, April 16, 2026.
Professor Yu Daimon of the University of Tsukuba
The event was a great success, with a full house. Professor Daimon, a leading expert who has spearheaded space development at JAXA, was invited as a special lecturer. He delivered a valuable lecture on the importance of 1D modeling cultivated in the harsh environment of space development and the essence of design.
The essence of 1D analysis lies in questioning and exploring "boundary conditions."
While many engineers struggle with the enormous computation time of 3D CFD (Computational Fluid Dynamics) and its discrepancies with reality, Professor Daimon arrived at the perspective of "defining input conditions oneself."
Starting with the question, "Are the given flow rates and temperatures truly correct?" he introduced 1D analysis to verify physical phenomena from upstream processes through simulation. He presented the trajectory of positioning 1D CAE not as a simplified version of 3D, but as a strategic tool for understanding the causal relationships of the entire system.
Advanced 1D Model Construction Supported "LE-9" Engine Development
The "LE-9" engine, the heart of the H3 rocket scheduled for launch this season, played a significant role in its development using the 1D system simulation software "SimulationX."
Construction of advanced physical models integrating regenerative cooling, phase change, and combustion reactions.
Prediction of behavior in extreme environments difficult to reproduce in ground tests.
Rapid feedback for ensuring overall system stability.
Professor Daimon instilled the importance of analysis within the company by conducting experiments himself and proving the accuracy of the data. This style, highly integrating actual machine testing and simulation, became the key to overcoming the challenges of space development.
Visualizing the "Unknown" and Accelerating Collaboration with Control Design
Even in areas where understanding physical phenomena is extremely difficult, such as "contact ignition" of attitude control thrusters, Professor Daimon maintained his belief in "visualization." By translating complex ignition phenomena into 1D models, he established a common language with control engineers. The episode of overcoming conflicts between engineers and achieving collaborative design resonated deeply with the audience.
"Design analysis is determined by what you understand."
To conclude his lecture, Professor Daimon proposed the following definition for 1D simulation:
"1D is not a simplified version of 3D. It is important to differentiate between physical/causal detail and spatial detail. What matters is not the superiority of dimensions, but the 'resolution of thought' of the designer."
Furthermore, the lecture concluded with the powerful words, "Design analysis is not determined by what you calculate, but by what you understand," making it not just a technical discussion but one that penetrates the essence of next-generation engineering.
Lecture by Newtonworks
In the same seminar, Newtonworks also conducted two sessions directly relevant to practical work.
"Modeling Methods for Heat Sources and Thermal Fluid Circuits for System Analysis"
This session explained specific modeling approaches for efficiently analyzing complex thermal fluid systems.
"Optimization from the Interaction of 'Detail' and 'Overall': Thermal and Energy Simulation Connecting Cities to Batteries"
This session introduced the latest simulation technology that integrally captures thermal management, from microscopic devices to macroscopic urban infrastructure.
Newtonworks will continue to contribute to solving complex design challenges and creating value through analysis technology.
Click here for the held seminar
Introduction to Thermal and Energy Management Solutions [YouTube Playtime: approx. 4 minutes]
What is 1DCAE?
"A smart design style that first confirms 'logical operation' using block diagrams before starting to draw blueprints."
It is contrasted with 3D CAE and refers to 1D in the sense of one dimension, but "1D" goes beyond the meaning of one dimension. It is a design concept that "simply expresses the essence of things and improves foresight," and is a method of simulating the entire system from a bird's-eye view in the upstream design phase where there is no shape.
What is SimulationX?
It is 1D CAE software developed by Keysight Technologies.
It features an easy-to-use GUI that can be deployed not only to specialists but also to on-site designers and experimenters.
It is sold in Japan by Newtonworks Co., Ltd.
What is Newtonworks Co., Ltd.?
Headquarters: Chuo-ku, Tokyo. President: Toshikazu Yamanashi. With CAE (Computer Aided Engineering) as its core business, it contributes to solving complex design challenges and creating value.
Professor Yu Daimon of the University of Tsukuba
The event was a great success, with a full house. Professor Daimon, a leading expert who has spearheaded space development at JAXA, was invited as a special lecturer. He delivered a valuable lecture on the importance of 1D modeling cultivated in the harsh environment of space development and the essence of design.
The essence of 1D analysis lies in questioning and exploring "boundary conditions."
While many engineers struggle with the enormous computation time of 3D CFD (Computational Fluid Dynamics) and its discrepancies with reality, Professor Daimon arrived at the perspective of "defining input conditions oneself."
Starting with the question, "Are the given flow rates and temperatures truly correct?" he introduced 1D analysis to verify physical phenomena from upstream processes through simulation. He presented the trajectory of positioning 1D CAE not as a simplified version of 3D, but as a strategic tool for understanding the causal relationships of the entire system.
Advanced 1D Model Construction Supported "LE-9" Engine Development
The "LE-9" engine, the heart of the H3 rocket scheduled for launch this season, played a significant role in its development using the 1D system simulation software "SimulationX."
Construction of advanced physical models integrating regenerative cooling, phase change, and combustion reactions.
Prediction of behavior in extreme environments difficult to reproduce in ground tests.
Rapid feedback for ensuring overall system stability.
Professor Daimon instilled the importance of analysis within the company by conducting experiments himself and proving the accuracy of the data. This style, highly integrating actual machine testing and simulation, became the key to overcoming the challenges of space development.
Visualizing the "Unknown" and Accelerating Collaboration with Control Design
Even in areas where understanding physical phenomena is extremely difficult, such as "contact ignition" of attitude control thrusters, Professor Daimon maintained his belief in "visualization." By translating complex ignition phenomena into 1D models, he established a common language with control engineers. The episode of overcoming conflicts between engineers and achieving collaborative design resonated deeply with the audience.
"Design analysis is determined by what you understand."
To conclude his lecture, Professor Daimon proposed the following definition for 1D simulation:
"1D is not a simplified version of 3D. It is important to differentiate between physical/causal detail and spatial detail. What matters is not the superiority of dimensions, but the 'resolution of thought' of the designer."
Furthermore, the lecture concluded with the powerful words, "Design analysis is not determined by what you calculate, but by what you understand," making it not just a technical discussion but one that penetrates the essence of next-generation engineering.
Lecture by Newtonworks
In the same seminar, Newtonworks also conducted two sessions directly relevant to practical work.
"Modeling Methods for Heat Sources and Thermal Fluid Circuits for System Analysis"
This session explained specific modeling approaches for efficiently analyzing complex thermal fluid systems.
"Optimization from the Interaction of 'Detail' and 'Overall': Thermal and Energy Simulation Connecting Cities to Batteries"
This session introduced the latest simulation technology that integrally captures thermal management, from microscopic devices to macroscopic urban infrastructure.
Newtonworks will continue to contribute to solving complex design challenges and creating value through analysis technology.
Click here for the held seminar
Introduction to Thermal and Energy Management Solutions [YouTube Playtime: approx. 4 minutes]
What is 1DCAE?
"A smart design style that first confirms 'logical operation' using block diagrams before starting to draw blueprints."
It is contrasted with 3D CAE and refers to 1D in the sense of one dimension, but "1D" goes beyond the meaning of one dimension. It is a design concept that "simply expresses the essence of things and improves foresight," and is a method of simulating the entire system from a bird's-eye view in the upstream design phase where there is no shape.
What is SimulationX?
It is 1D CAE software developed by Keysight Technologies.
It features an easy-to-use GUI that can be deployed not only to specialists but also to on-site designers and experimenters.
It is sold in Japan by Newtonworks Co., Ltd.
What is Newtonworks Co., Ltd.?
Headquarters: Chuo-ku, Tokyo. President: Toshikazu Yamanashi. With CAE (Computer Aided Engineering) as its core business, it contributes to solving complex design challenges and creating value.