環境シミュレーション List of Products and Services

We have been engaged in various thermal fluid analysis services for over a decade, working hard and brainstorming with many customers, accumulating a wealth of know-how, insights, and presentation skills. The contracted analysis we provide has many advantages, such as: - Usable even by users who cannot operate software. - Convenient when time is limited or when the volume of analysis work is large. - Results can be interpreted by beginners in reports and other documents. - Conducted by experts, ensuring no concerns about the accuracy of the results. We promise to further enhance the level of analysis through organic collaboration with our customers while shedding light on unknown phenomena through simulation and opening new horizons of knowledge. For more details, please contact us or download the catalog.

• Analysis Services

The close-up tsunami load simulation research began with the aim of re-evaluating the tsunami load specifications that evacuation buildings should have, by gaining a detailed understanding of the behavior of loads on buildings caused by tsunamis resulting from frequent trench-type earthquakes. However, in light of the unprecedented damage caused by the Great East Japan Earthquake and the resulting large tsunami, the need for simulations that were not included in previous settings has arisen. Specifically, tsunami load evaluations for wave heights of 10 to 20 meters and assessments of tsunami loads on groups of buildings are now considered essential and urgent for the design of not only evacuation buildings but also facilities constructed along the coast and urban planning. For more details, please download the catalog.

• Other analyses
• Contract Analysis

The airflow analysis within the power supply unit aims to clarify the characteristics of airflow within a typical power supply unit used as an analysis model. The power supply unit plays a crucial role in providing stable power to computers, including PCs, and since it contains many high-temperature heat-generating components, how efficiently it can dissipate heat is a significant point. For more details, please download the catalog.

• Other analyses
• Contract Analysis

In the thermal airflow analysis of electronic device enclosures, we conducted ventilation analysis through numerical simulations within the enclosures. With the improvement of technology, electronic components are increasingly shrinking, making thermal issues within the enclosures unavoidable. The placement of high-heat-generating components and ventilation parts such as fans can significantly affect the performance of the devices themselves. We conducted the analysis to gain insights into this. For more details, please download the catalog.

• Other analyses

SuperCartesian: In the analysis of airflow within the engine cylinder, we accurately represented the intake manifold and valve shapes, and conducted airflow analysis from the intake manifold to inside the engine cylinder. When predicting the performance of an internal combustion engine, it is crucial to understand the airflow characteristics of the mixture being delivered into the cylinder. These airflow characteristics are significantly influenced by the shapes of the intake manifold and valves, which in turn affect combustion efficiency. For more details, please download the catalog.

• Other analyses

Moving Boundary: The analysis of airflow around cooling towers during fan rotation aims to clarify the characteristics of airflow both inside and outside the cooling tower by adopting a general cooling analysis model. Cooling towers are one of the air conditioning systems commonly installed in large commercial facilities, factories, and government offices, and they are devices used to cool circulating water. By spraying water in droplets from above and blowing air with a fan to contact it with outside air, the temperature is lowered to create cooling water. For more details, please download the catalog.

• Other analyses

Moving Boundary: In the flow analysis of a mixing tank caused by the rotation of an impeller, we conducted a numerical simulation that visualizes the behavior of the fluid within the tank, incorporating moving boundaries. The mixing and blending of fluids in a mixing tank is one of the important processes in the chemical and bio fields. There are various types of blade shapes, and the goal is to sufficiently mix and blend the contents of the mixing tank. For more details, please download the catalog.

• Other analyses

Moving Boundary: The internal airflow analysis of the Sirocco fan aims to investigate the airflow characteristics within the Sirocco fan by modeling the basic shape of the fan and applying moving boundary conditions to the blades. The Sirocco fan is a centrifugal multi-blade fan with forward-curved blades, and its characteristics involve many factors such as the shape of the blades, the number of blades, and the shape of the casing. For more details, please download the catalog.

• Other analyses

In the thermal fluid analysis of the continuous casting machine mold, we conducted a thermal fluid analysis related to the continuous casting equipment in steelmaking plants. We faithfully modeled the mold and immersion nozzle to reproduce the flow within the molten steel bath, which is extremely important for controlling the solidification shell thickness and reducing non-metallic inclusions, making it an essential requirement for high-speed casting equipment. In this analysis, we simulated the impact of the molten steel flowing from the immersion nozzle on the flow state within the mold, as shown in the diagram below. For more details, please download the catalog.

• Other analyses

The thermal flow analysis within the thermal storage tank reproduces the ducts and structures inside the tank and conducts thermal flow analysis regarding the flow velocity and temperature stratification of the liquid within the tank. When predicting the performance of the thermal storage tank, it is crucial to understand the temperature distribution changes of the fluid inside the tank. This characteristic is greatly influenced by the shape and flow velocity within the tank, which in turn affects the temperature stratification of the liquid in the thermal storage tank. For more details, please download the catalog.

• Other analyses

The analysis of the wind environment around the Minami-Oi Mansion examined the impact on the wind environment in the surrounding area for a residential building located in the urban area of Ota Ward, Tokyo, during the summer (southwest wind) and winter (north wind). There have been frequent issues related to the wind environment (building wind) concerning the construction of relatively low-rise apartments, around 10 stories, primarily in Tokyo. The situation is such that a building of about 30 meters in scale is being constructed in an area densely populated with single-story buildings (around 6 meters high). Therefore, if the planned building is positioned in a way that obstructs the wind path of the block, there are concerns about the deterioration of the surrounding wind environment. For more details, please download the catalog.

• simulator
• Contract Analysis
• Structural Analysis

The analysis of the wind environment around high-rise buildings aims to investigate the degree of impact on the surrounding area, which inevitably increases. In urban areas, it is not uncommon for buildings over 100 meters in height to be constructed; however, in such cases, the impact on the wind environment (building wind) differs significantly compared to situations where relatively low-rise apartments are built in residential areas. For buildings exceeding 100 meters, the recirculation zones that appear on the approach (upwind) side and the wakes (downstream vortices) that occur behind them are naturally very large, resulting in a correspondingly significant impact on the surroundings. This analysis examined the changes in the wind environment when high-rise buildings are constructed in areas where the surrounding space is relatively open. For more details, please download the catalog.

• Contract Analysis
• Structural Analysis

The wind environment analysis around the condominium was conducted for condominium buildings located in urban areas, with results for summer (southwest wind) and winter (north wind). When constructing or expanding buildings in urban areas, the wind conditions within the site or surrounding area can change significantly. This is known as the wind environment (building wind) issue. Generally, an investigation is conducted on the changes in wind speed distribution caused by the presence of the planned building for all wind directions (8 or 16 directions), comparing it to the conditions before construction. For a simplified evaluation, analysis is conducted only for the prevailing winds of each season. For more details, please download the catalog.

• simulator
• Contract Analysis
• Structural Analysis

Moving Boundary: The analysis of wind pressure acting on a moving train was conducted using numerical simulations that take into account the moving boundary. There are concerns that strong winds, such as those caused by typhoons, can overturn moving trains. Therefore, understanding the wind pressure acting on a moving train is crucial. For more details, please download the catalog.

• simulator
• Contract Analysis
• Structural Analysis

The purpose of wind environment analysis in sloped terrain is to examine some of the challenging issues that exist within wind environment analysis. Analyzing areas that include sloped and undulating terrain is one of these issues. The reason for this is that the differences in elevation between buildings and their foundations make it difficult to create analysis models. Another reason is the question of how to set the conditions for approaching wind on sloped terrain. As with analyses on flat land, a power-law distribution is generally used as the basis, but it is preferable to establish a distribution along the slope of the terrain. Furthermore, there is a need to set the height of the sky plane higher than in standard analyses. For more details, please download the catalog.

• Contract Analysis
• Structural Analysis

The air conditioning analysis in a refrigerated warehouse was conducted using an example of a freezer equipped with an automatic conveyor. Air conditioning analysis has traditionally been performed in large spaces such as atriums and domes, but recently it has increasingly been applied to specialized spaces as well. Examples include automated warehouses, clean rooms, underfloor air conditioning, displacement ventilation, and food factories, each of which has stringent air conditioning performance requirements, making it difficult to set equipment specifications. For more details, please download the catalog.

• simulator
• Contract Analysis
• Structural Analysis

The analysis of the thermal environment in heated swimming pools focused on the air conditioning analysis during heating, where the cold draft from the circular roof glass surface becomes a problem. The temperature distribution in large spaces tends to be more disturbed compared to smaller spaces. This is generally because large spaces are more likely to have uneven wall flow and heat loads, making it difficult for the conditioned air to circulate in the occupied zone. Recent air conditioning analyses have become capable of accurately simulating actual properties, including the three-dimensional shape of the structure, the behavior of supply and return air, and various heat loads. For more details, please download the catalog.

• simulator
• Contract Analysis
• Structural Analysis

The thermal flow analysis of the cooling tower was conducted to predict white smoke generation during winter for a large 8-cell configuration, taking into account external wind and humidity (water vapor movement). There are many thermal flow devices related to building equipment whose characteristics and behaviors are not well understood. The cooling tower is one of them, but by precisely setting the structure, flow conditions, and thermal conditions of each cell of the cooling tower, it becomes possible to reproduce the thermal flow state quite accurately. For more details, please download the catalog.

• Contract Analysis
• Structural Analysis
• simulator

The air conditioning analysis within the foundry examined the air conditioning of the factory space with ventilation from the outside during still air conditions. In facilities such as factories, functionality such as air conditioning performance and ventilation efficiency takes precedence over design considerations. When evaluating the ventilation and air conditioning performance of the factory space, even if the ventilation and air conditioning airflow are set according to the heat generation of each section, the air flow between sections does not guarantee that the living area is always maintained at the specified temperature. Therefore, it is necessary to carefully consider the arrangement of nozzles and airflow settings. For more details, please download the catalog.

• simulator
• Contract Analysis
• Structural Analysis

It is known that there are significant fluctuations in speed and pressure before and after trains pass each other in narrow spaces such as tunnels and subway stations. This is very important for the design of vehicles, tunnels, and associated structures. In this analysis, we simulated the airflow and pressure fluctuations affecting the surroundings when the train bodies pass each other using a moving boundary problem. For more details, please download the catalog.

• Thermo-fluid analysis
• simulator
• Contract Analysis

The air conditioning analysis within an electrical components factory was conducted using a factory that has a clean room as an example. Unlike general architecture, where aesthetics (design) are emphasized, in facilities such as factories, functionality such as air conditioning performance and ventilation efficiency takes precedence over design. Even when achieving the same ventilation and air conditioning performance, there is often significant potential for cost reduction regarding the arrangement of ducts and outlets. For more details, please download the catalog.

• simulator
• Contract Analysis
• Structural Analysis

It is known that there are significant speed and pressure fluctuations at the front and rear of vehicles running in narrow spaces such as tunnels and subway stations. In this analysis, we conducted simulations regarding the impact on the area around the platform (airflow, pressure) when a train passes, using the moving boundary problem. For more details, please download the catalog.

• Thermo-fluid analysis
• simulator
• Contract Analysis

What are the ventilation characteristics around the windbreak room of the sliding door? In sliding doors that open and close based on traffic volume, it is important to capture the temporal changes in ventilation airflow. This analysis treats the sliding part as a moving object, aiming to gain insights into the circulation of air inside and outside. For more details, please download the catalog.

• Thermo-fluid analysis
• simulator
• Contract Analysis

What are the ventilation characteristics of revolving doors? In revolving doors, where the opening area changes significantly over time, it is important to capture the temporal variation of the ventilation airflow. This analysis treats the revolving section as a moving object, aiming to gain insights into the circulation of air inside and outside. For more details, please download the catalog.

• Thermo-fluid analysis
• simulator
• Contract Analysis

Thermal fluid equipment related to building facilities often has many unknown characteristics and behaviors. Cooling towers are one such example, but by precisely setting the structure, flow conditions, and thermal conditions of each cell in the cooling tower, it is possible to reproduce the thermal fluid state quite accurately. In this analysis, we conducted a cooling tower thermal fluid analysis considering external winds to examine the impact of the airflow state around high-rise buildings and the arrangement of multiple cooling towers with different specifications on the temperature distribution of the heat released from each cell to the outside air. For more details, please download the catalog.

• Thermo-fluid analysis
• simulator
• Contract Analysis

To reduce air conditioning load, natural ventilation that actively circulates outside air into the building is effective. Recently, incorporating structures such as eco voids and eco shafts into the basic design stage has gained attention for efficient natural ventilation. At that time, the size of the openings for bringing in outside air and their installation positions must be appropriate. In this analysis, we conducted ventilation analysis to examine the relationship between opening conditions and ventilation status. We modeled the target building and accurately reproduced the internal and external spaces of the building. For more details, please download the catalog.

• Thermo-fluid analysis
• simulator
• Contract Analysis

The entrance hall targeted for analysis is a large space with a height of approximately 20 meters. During the basic design phase, it is crucial to verify whether there are any issues with the temperature distribution and airflow in the living area based on the position, number, wind speed, and temperature of the air conditioning air outlets. This is very important for considering comfort and energy efficiency. Additionally, it is necessary to take into account the variations in conditions due to the seasons. In this analysis, we detailed the internal space of the building, the arrangement of the air outlets and inlets, and the thermal load, conducting air conditioning analysis for summer, winter, and transitional periods. For more details, please download the catalog.

• Thermo-fluid analysis
• simulator
• Contract Analysis

In recent years, there have been many cases where natural ventilation utilizing outside air is actively incorporated during intermediate periods. Among these, a ventilation method that uses shafts installed within the building as exhaust and supply air systems has been considered from the basic design stage to efficiently carry out natural ventilation. The selection of appropriate locations and sizes for supply and exhaust openings is extremely important, and conducting thermal airflow simulations can provide insights into the overall operation of the building. In this analysis, we assumed windy conditions and performed thermal airflow simulations based on the plans at the basic design stage. For more details, please download the catalog.

• Thermo-fluid analysis
• simulator
• Contract Analysis

In server rooms and data centers, there are many servers and IT equipment, and heat management is essential for their stable operation. As a countermeasure, the exhaust fans on the back of the server racks are positioned to face each other, creating a pathway (hereinafter referred to as the hot aisle) that primarily directs exhaust from the racks upward. Conversely, the intake sides at the front of the server racks are also positioned to face each other, creating a pathway (hereinafter referred to as the cold aisle) that primarily introduces cool air from the floor into the server racks. This arrangement allows for efficient exhaust. However, at the top of the server racks, there is a risk of drawing in high-temperature exhaust from the equipment (short-circuiting), so we considered countermeasures and conducted a comparison based on the presence or absence of a partition (hereinafter referred to as aisle capping) at the top of the cold aisle. For more details, please download the catalog.

• Thermo-fluid analysis
• simulator
• Contract Analysis

The natural ventilation analysis of high-ceiling spaces conducts an examination of natural ventilation in buildings with high ceilings during the summer and in calm conditions. In large spaces, there is often a trial-and-error approach to maintaining a comfortable temperature distribution by not solely relying on air conditioning but also expecting natural ventilation. During the summer and transitional periods, the temperature distribution within the space often stratifies, with higher temperatures at the top due to solar radiation and wall convection. Therefore, if there are openings at the upper part, density-driven convection can occur, allowing hot air to be expelled outside the building. In recent thermal environment analyses, if the size, position, and opening ratio of the openings are known, it is also possible to directly calculate the ventilation airflow rate. For more details, please download the catalog.

• simulator
• Contract Analysis
• Structural Analysis

The ventilation analysis of wholesale markets involved the natural ventilation analysis of building complexes in the presence of external winds. In recent years, advancements in thermal environment analysis technology through numerical calculations have made it possible to perform analyses with over a million meshes even on personal computer-based systems, allowing for detailed construction of building structures. If the detailed structure of the building can be represented, it becomes possible to directly evaluate the state of wind circulation by simultaneously solving the thermal and flow fields of the internal and external spaces. For more details, please download the catalog.

• simulator
• Contract Analysis
• Structural Analysis

[Purpose of Analysis] This is an analysis case aimed at understanding the thermal environment in areas where people move, such as concourses and corridors, when constructing a train station building. Due to the influence of the window arrangement of the station building and the solar radiation that passes through those windows, as well as the fluctuations in the number of people staying inside the station at different times, the thermal environment varies by time. As a result, it is currently challenging to grasp the thermal environment during the basic design phase of the station building. In this analysis case, we modeled a hypothetical train station in a regional city during the summer at 4 PM using WindPerfectDX. We considered the solar radiation load transmitted, absorbed, and re-radiated by the fixed windows on the west side of the concourse, the heat load from human bodies and lighting, and the convective load from the roof and walls, with the aim of understanding the thermal environment in the concourse and corridors of the station building.

• Thermo-fluid analysis
• simulator
• Contract Analysis

We have developed a software called "PocketMyHome" in collaboration with Computer System Research Institute Co., Ltd., which enables ventilation simulation based on WebCAD, and we have started offering it to our customers. This product allows for 3D shape input from the web, simulation execution, and result display, all operable on CAD, achieving a revolutionary speed-up with a total time of about 15 minutes from input start to result display. The calculation engine uses our WindPerfect, which is renowned for its analytical accuracy. We invite you to view a demo and confirm its capabilities. For more details, please contact us or download the catalog.

• 3D CAD

◆Moving Boundary Problem: It is possible to move multiple objects independently and arbitrarily. The analysis of moving boundary problems, such as the movement of complex objects, opening and closing doors, and rotating machinery, which was essentially impossible in unstructured grids, can now be easily performed. It is also possible to feedback the fluid forces acting on the objects into their motion. ● Changes in degrees of freedom such as axial movement and rotation around each coordinate axis can be achieved through simple motion definitions. ● Analysis is possible not only for solid structures with volume but also for thin structures (shells) without thickness. ● Various conditions can be assigned to moving objects, such as heat transfer and mass transfer boundaries, as well as free surface flows. ● The situation of time-varying flow fields can be animated along with the movement of moving objects for detailed examination. ◆ e-flowDX Tsunami Load Analysis Version In response to the unprecedented damage caused by the Great East Japan Earthquake and the resulting tsunami, there has arisen a necessity for simulations that were not part of previous settings. Specifically, the evaluation of tsunami loads from waves as high as 10 to 20 meters and the assessment of tsunami loads on groups of buildings are now considered essential and urgent for the design of facilities built along the coast, not just for evacuation buildings, but also for urban planning.

• Contract Analysis
• Thermo-fluid analysis
• simulator

● WindPerfectDX 2012 Edition 2 Released! It has been reborn as software that can solve problems in the fields of architecture and civil engineering, from simple to complex and large-scale, with easy operations for airflow and temperature. ―――――― ◆ Features 1. Wind environment and external airflow simulation 2. Heat island simulation 3. Natural ventilation simulation 4. Wind load simulation (planned for release) 5. Other simulations (rainwater drainage and snow retention issues, performance verification of cool bits, and other thermal fluid-related problems) ―――――― <Simple interface, 3D CAD data import function, and diverse result visualization features> - With an easy-to-use interface, built-in various data, and excellent 3D graphics visualization capabilities, it is widely usable from beginners in analysis to heavy users of CFD. - By incorporating CAD data import and CFD parts functionality, it strongly supports simulation operations in BIM. - Equipped with numerous convenient features for various analyses, including wind damage rank evaluation, radiation calculation, PMV evaluation, condensation determination, heat island assessment, parameter evaluation, and airflow thermal balance checks.

• Thermo-fluid analysis
• simulator
• Contract Analysis