Geophysical Fluid Dynamics
- Location: Room OB17, Basement, Kathleen Lonsdale Building
- Telephone Extension: 32410
- Laboratory Manager: Dr Carolina Lithgow-Bertelloni
The Geophysical Fluid Dynamics Laboratory is a state of the art facility for
the joint visualization of velocity and temperature of viscous flow, boasting
unique custom made automated equipment for 3-D imaging and advanced
software for data acquisition and post-processing. We are focused on Earth
and planetary scale problems.
The automated system is a custom designed and built motion control system
of a camera member with two 3-chip CCD cameras in a stereoscopic arrangement
and of a fiber optic halogen lightline with a positional accuracy and repeatability
better than 4 microns. The illumination of many planes of a given volume allows for 3-D
particle image velocimetry (PIV) and thermometry (PIT) with liquid crystals.
The system is controlled by open-source custom software written in visual basic
that controls automatic data acquisition in situ and remotely. Data acquisition is fast
and reliable. Post-processing with a novel hybrid PTV/PIV algorithm produce highly
accurate velocity images. TLC measurements are complemented by a finite-volume
solver of the temperature field given the measured velocities.