For more information:
tezduyar@gmail.com

Computational Model of the Aerodynamics of a
Hummer with Rotating Antenna
CDT Steven Kedrowski, USMA
Principal Investigator:
Professor Tayfun E. Tezduyar,
T*AFSM
This project utilized a method newlydeveloped by the T*AFSM to
accommodate the mesh update requirements of flow problems with spinning
geometries. The ShearSlip Mesh Update Method (SSMUM) is being used in
conjunction with the DeformingSpatialDomain/Stabilized SpaceTime
(DSD/SST) formulation, also developed earlier by the T*AFSM. The DSD/SST
formulation, enhanced with the SSMUM, can be very effectively applied to
modeling of geometries that undergo rotations or straightline
translations. This is accomplished by letting, at each time step, the
elements in a thin zone undergo "shear" deformation. This zone is
remeshed frequently via regeneration of element connectivity. CDT
Kedrowski generated the geometric model and the finite element mesh, and
carried out the parallel computations to solve the timedependent
NavierStokes equations around the Hummer with rotating antenna.
In this project, CDT Kedrowski was helped by Dr. Marek Behr, at that time
a resarch associate supervised by Tezduyar. Figure
1 shows the computer model of the Hummer and Antenna. Figure 2 shows the
computed flow field at an instant when the Antenna has rotated 180
degrees.
Figure 1. Model of the Hummer and Antenna.
Figure 2. Computed flow field around the Hummer at an instant when the
Antenna has rotated 180 degrees. Air velocity.
