アールフロー List of Products and Services

"R-FLOW" is a domestically produced general-purpose thermal fluid and powder analysis software with a 30-year history. By adopting a uniquely developed "dynamic domain decomposition method," R-FLOW has made it possible for the first time in the world, as a commercial software, to analyze baffled mixing tanks and twin-screw extruders. Additionally, in 2002, it independently developed a representative particle model (coarse-grained model) applying DEM (Discrete Element Method), leading practical powder analysis as a pioneer in the field. 【Features】 ■ Fluid and powder coupled analysis such as waste combustion reaction analysis and spray/drying analysis using DEM and representative particle models ■ Free surface flow analysis using the MPS method (Meshless Particle Method) ■ Various specialized functions for mixing tank and screw extruder analysis, including databases related to various mixing blades, mixing tanks, and screw extruder shapes ■ Single-axis/twin-screw extruder analysis *For more details, please refer to the catalog or feel free to contact us.

• Image analysis software

A case study of multiphase flow analysis that reproduces the combustion process of waste introduced into a stoker-type incinerator. The behavior of the waste is analyzed using a unique representative particle (coarse-grained) model developed by applying the DEM (Discrete Element Method), which is a powder analysis technique. The waste introduced from the waste inlet moves towards the ash discharge direction while resting on the grate inside the incinerator. Primary air is blown in from below the grate, and secondary air is blown in from above, allowing the waste to undergo the combustion processes of drying, pyrolysis, and char combustion as it moves over the grate, gradually breaking down into smaller fragments. The gases targeted in the combustion analysis are eight components, including oxygen, and the analysis considers the generation and disappearance of heat and chemical species associated with combustion, treating them as compressible gases. The waste is represented as bonded particles that adhere to each other due to adhesive forces, and by incorporating a bonding model where the adhesive forces between the bonded particles gradually decrease as combustion progresses, the process of the initially large mass of waste breaking apart is reproduced.

• Other analyses
• Software (middle, driver, security, etc.)

A case study of sludge combustion analysis in a fluidized bed incinerator using sand as a fluidizing medium. Both sludge and sand are analyzed using a unique representative particle (coarse-grained) model developed by applying DEM (Discrete Element Method). The introduced sludge is fluidized together with sand. Air is blown in from the bottom of the furnace, and the sludge is fluidized while undergoing the combustion processes of drying, pyrolysis, and char combustion, gradually breaking down into smaller fragments. The gases targeted in the combustion analysis are eight components, including oxygen, and the analysis considers the generation and disappearance of heat and chemical species associated with combustion, treating it as compressible gas.

• Other analyses
• Software (middle, driver, security, etc.)

A case study of multiphase flow analysis of gas, catalyst particles, and droplet behavior in a Fluid Catalytic Cracking (FCC) unit in the petroleum refining process. The behavior of catalyst particles and droplets is analyzed using a uniquely developed representative particle (coarse-grained) model that applies the discrete element method (DEM), a technique for powder analysis. On the other hand, the gas flow with heat is analyzed using a lattice (mesh). Droplets evaporate by receiving heat from high-temperature catalyst particles through the gas, and simultaneously, a large amount of steam is generated within the FCC unit as a result of the evaporation.

• Image analysis software

This is a case study of multiphase flow analysis that reproduces the process of droplets (fine particles) drying as they come into contact with high-temperature gas inside a spray dryer. The behavior, temperature, and evaporation rate of droplets injected from the top of the tank are analyzed using a discrete element method (DEM) model that incorporates a uniquely developed representative particle (coarsening) model. As drying progresses, the particles (droplets) gradually become smaller and either disappear within the tank or exit through the outlet at the bottom. Meanwhile, high-temperature gas flows in from the top of the tank and exits from the bottom. The concentration of water vapor in the gas is also analyzed. In the figure, the particles are displayed larger than their actual size.

• Image analysis software

A case study of multiphase flow analysis of fluid dynamics and gas absorption reactions in an aerated stirred tank used for cell culture and other applications. The analysis considers not only the flow rate but also gas hold-up, liquid-phase oxygen concentration, liquid-phase carbon dioxide concentration, bubble-phase oxygen concentration, and bubble-phase carbon dioxide concentration, taking into account mass transfer between the gas and liquid phases. Additionally, it incorporates the consumption of oxygen and the generation of carbon dioxide due to cellular respiration, as well as a bubble coalescence and breakup model, and analyzes the bubble size distribution.

• Image analysis software

A case study analyzing the oil flow within the final drive (final gear), which is one of the power transmission devices, using the particle method (MPS method).

• Image analysis software

Case study of multiphase flow analysis in a trickle bed reactor used in petroleum refining and petrochemical processes. The trickle bed reactor is filled with catalyst, and the flow of gas and liquid through the spaces between the catalysts is reproduced through a coupled analysis using lattice methods and particle methods (MPS method). The flow of liquid is analyzed using the particle method (MPS method), while the flow of gas is analyzed using a lattice (mesh).

• Image analysis software

The process of cleaning metal shavings and chips remaining inside the metal mold by a jet water flow ejected from the nozzle is reproduced through a coupled analysis of the particle method (MPS method) and DEM (Discrete Element Method). The flow of water is analyzed using the particle method (MPS method), while the metal shavings and chips are analyzed using DEM (Discrete Element Method) with bonded particles.

• Image analysis software

Introducing the "Guided High-Efficiency Piezo Fan" handled by R-Flow. In conventional piezo fans, some of the flow that is ejected forward leaks from the sides of the fan, resulting in a weaker discharge flow. This issue has been overcome by adding guides on both sides of the fan. The guided piezo fan efficiently directs the flow forward without any lateral leakage, significantly increasing the discharge flow compared to conventional models. 【Features】 ■ International patents obtained (Japan, USA, Europe) ■ Guides on both sides of the fan ■ No lateral leakage ■ Efficiently directs flow forward ■ Significantly stronger discharge flow compared to conventional models *For more details, please refer to the PDF document or feel free to contact us.

• fan

"R-VIEW" is software designed to meet the needs of those who want to quantitatively understand actual flow patterns and validate results obtained from fluid simulations through visualization experiments, enabling easy measurement of three-dimensional velocity distributions. In addition to a simple shape creation function, it includes post-processing and graph display features for visualizing particle (tracer) trajectories and three-dimensional velocity distributions. 【Processing Flow】 1. Particle extraction 2. Input of device shape and camera calibration 3. Extraction of the three-dimensional position of particles 4. Post-processing *For more details, please refer to the PDF document or feel free to contact us.

• Software (middle, driver, security, etc.)

SCREWFLOW-MULTI is a thermal fluid analysis software designed for high-viscosity resins in single and twin-screw extruders. It is recommended for those who want to evaluate mixing in screw extruders, conduct powder analysis, or perform thermal flow analysis of high-viscosity fluids! 【Contents】 ■ Flow analysis within twin-screw extruders ■ Particle analysis using connected particles ■ Flow analysis of the injection molding back process ■ Integrated analysis within screw extruders using a combination of DEM and MPS methods *For more details, please refer to the PDF materials or feel free to contact us.

• Image analysis software
• Contract Analysis

General waste contaminated with radioactive cesium (Cs) that spread due to the accident at the Fukushima Daiichi Nuclear Power Plant is being incinerated at municipal waste incineration facilities. In this context, we developed a Cs behavior analysis code to evaluate the concentration and distribution of Cs that volatilized during incineration, as well as the attachment of Cs to the main ash and fly ash generated by the incineration of general waste. This document introduces the analysis flow of the "waste combustion and Cs behavior analysis code in the incinerator," along with diagrams illustrating the agglomeration of CsCl particles and their attachment to the main ash and fly ash. [Contents (excerpt)] ■ Overview of waste combustion and Cs behavior analysis in the incinerator ■ Overview of the analysis code and analysis flow ■ Analysis of the gas phase during the waste combustion process in the incinerator ■ Combustion reactions considered in waste combustion analysis ■ Analysis of the solid phase during the waste combustion process in the incinerator, etc. *For more details, please refer to the PDF document or feel free to contact us.

• Contract Analysis