Abstract
Vortex methods are numerical methods for simulating
uid
ow.
They use a simple formulation where only the trajectories of discrete vortex particles
are simulated. In our method we combine a high order particle-mesh based vortex
method with an iterative penalization method to simulate external
ows around
arbitrary geometries such as bridge decks. The method only uses a discretized ge-
ometry as input and can easily simulate an arbitrary motion of the geometry. As
vorticity is a bounded quantity and the velocity eld can easily be calculated for
a mixture of free-space- and periodic boundary conditions, the method allows for
a minimized domain and hence minimal computational resources. However in an
external
ow problem, vorticity is produced in the boundary layers and transported
downstream, consequently the computational domain must grow in time to encap-
sulate the entire vorticity eld. We present a method for truncating this domain
by supplementing the free-space- and periodic conditions with an out
ow condition.
The method is conveniently applied within the eld of bridge aerodynamics as it
can be used for the calculation of the aerodynamic net forces, which depend highly
on the geometry and the wake forming behind it. This is demonstrated in 2D and
3D simulations
Original language | English |
---|---|
Publication date | 2015 |
Number of pages | 1 |
Publication status | Published - 2015 |
Event | 68th Annual Meeting of the American Physical Society's Division of Fluid Dynamics (DFD) - Boston, United States Duration: 22 Nov 2015 → 24 Nov 2015 https://apsdfd2015.mit.edu/home |
Conference
Conference | 68th Annual Meeting of the American Physical Society's Division of Fluid Dynamics (DFD) |
---|---|
Country/Territory | United States |
City | Boston |
Period | 22/11/2015 → 24/11/2015 |
Internet address |