Numerical Study of a Medium-Speed Train with the Influence of Wall on One Side

Vivien S. Djanali*, Quraisy Amri, Agus Windharto

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This study was conducted to determine the aerodynamic drag on the surface of the medium-speed train, especially when passing through a wall on one side of the railroad tracks. A steady, three-dimensional numerical study was carried out. The train was designed to operate on a narrow-gauge track. The turbulence model used was the k-ω SST. The type of meshing used was a combination of hexahedral and tetrahedral cells. The simulation was performed at velocities of 120 km/h (33.3 m/s) and 160 km/h (44.4 m/s), which correspond to the Reynolds numbers based on the height of the train of 7.76 × 106 and 10.34 × 106, respectively. There were two variations of the distance of the wall to the center of the railway tracks, i.e., 2.35 m (0.69H) and 6 m (1.76H), with H is the height of train. The results obtained showed that a train with the influence of a wall at a distance of 2.35 m has a higher drag coefficient than that with a wall at a distance of 6 m. The closer the distance of the wall increased the drag experienced by the train. At a wall distance of 2.35 m, there was a difference in the value of the pressure coefficient on the sides of train surface of the train. The resulting pressure coefficient on the surface close to the wall was smaller than the open airside.

Original languageEnglish
Title of host publicationRecent Advances in Mechanical Engineering - Select Proceedings of ICOME 2021
EditorsIvan Tolj, M.V. Reddy, Achmad Syaifudin
PublisherSpringer Science and Business Media Deutschland GmbH
Number of pages10
ISBN (Print)9789811908668
Publication statusPublished - 2023
Event5th International Conference on Mechanical Engineering, ICOME 2021 - Virtual, Online
Duration: 25 Aug 202126 Aug 2021

Publication series

NameLecture Notes in Mechanical Engineering
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364


Conference5th International Conference on Mechanical Engineering, ICOME 2021
CityVirtual, Online


  • Aerodynamic
  • Drag coefficient
  • Medium-speed train
  • Pressure coefficient


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