I analyzed the airflow when vehicles pass each other using the moving boundary problem.
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.
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【Analysis Model and Conditions】 - The analysis space is a tunnel with a length of 200.0m, a width of 12.0m, and a height of 5.0m. - Two trains moving relatively to each other are each 100.0m long, 2.8m wide, and 4.0m high. - It is assumed that both trains are traveling at 22.2m/sec (80km/h) and will pass each other. - The total number of grids is 650×77×42=2,102,100. 【Analysis Results】 - The pressure distribution around the train bodies during the passing, along with velocity vectors and wind speed distribution, is illustrated. → Just before the trains pass each other, the pressure reaches a peak, and it rapidly changes from positive to negative pressure at the moment they pass. → In the wind speed distribution, turbulence generated after the train bodies pass is confirmed behind the vehicles (near the center of the space). - This method allows for easy modification of train shapes, station structures, and train speeds for analysis. ● For more details, please contact us or download the catalog.
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In environmental simulation, we develop and sell proprietary 3D fluid analysis programs and provide contract analysis services using these software tools. For over a decade, we have been engaged in thermal fluid analysis in fields such as architecture, civil engineering, machinery, and electronics, handling numerous analyses and accumulating a wealth of know-how and knowledge. Our diverse analysis and visualization functions, honed through practical experience, have received high praise as CFD software from many companies and research institutions. ● Import functionality for BIM-compatible CAD data such as Revit and DXF ● Map information (GIS) data import functionality ● SuperCartesian functionality that freely represents diagonal boundaries and complex curved surfaces ● High-speed, high-precision radiation calculations and high-precision turbulence analysis using DNS ● Moving boundary problem analysis functionality that accommodates the movement of multiple objects in space ● User-friendly interface and easy-to-understand animation features In addition to software support, we also accept contract analyses. Focusing on air conditioning ventilation and wind environment analysis, we provide high cost-performance solutions for a wide range of problems, from simple, small-scale issues to complex, large-scale analyses. We look forward to your visit, along with our abundant analysis case studies.