Overset

Modeling of in-cylinder flow using overset mesh

Overset mesh has gained popularity in modeling applications with complicated geometries due to its flexibility in handling arbitrary motion. This paper presents a study on application of overset mesh for in-cylinder flow using STAR-CCM+®. Different mesh strategies were investigated including trim, poly, and direct mesh. It was found that the results are similar from different mesh while ploy mesh overall produces more robust results than trim mesh.

Oil splash simulation in final drive with Overset

The reduction of CO2 emissions is one of the biggest challenges to the automotive industry. An optimally designed driveline with effective cooling and lubrication provides substantial CO2 reduction. The cooling and lubrication performance is critical to the functionality and durability of vehicle drive units, such as transmissions and differentials. Final drive includes gears, bearings and shafts to transmit power from the engine to the wheels. Final Drives rely on splash lubrication where the oil flow is driven by the rotation of the gears and guided to important positions.

Aerodynamic crossing tramways in tunnel

Aerodynamic crossing tramways in tunnel by CFD

Alstom designs and manufactures a wide range of trains. The aerodynamic specific topic of tunnel entry and crossing trains in tunnel is an important design topic for high speed train in terms of tympanic comfort and structure load because of complex pressure waves.