| Aerodynamic research on medium speed trains is trying to map the flow of fluid around trains. The train model testing was carried out to study Cd values experimentally using a closed-loop wind tunnels at the Balai Besar Teknologi Aerodinamika, Aeroelastika, dan Aeroakustika. In addition to the experimental method, the computational method can be used to validate the experiment results and to map the fluid flow around the train model and calculate Cd value. The computational results of Cd obtained using ANSYS are compared against Cd values from wind tunnel tests. Further analysis using the ANSYS program with variations in the yaw angle can predict the effects of crosswind on the train model. It is found that vortices are formed around the train body and modifying the head shape and adding fairing increases Cd values. |