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Research by William Lindberg
Stratified Flow Past Complex Topography
Dr. William R. Lindberg, (1993-present)
Consider a prevailing wind which is blowing normal to the crests of a set of parallel hills. In the valley created by the hills, conditions may exist for extended periods where there is no clearing out of the air in the valley, especially in winter conditions. This air exchange is termed 'ventilation' and is critical to the air quality within the valley. The same type of conditions may exist in the ocean or the larger lakes, where there are basins which require ventilation conditions to occur in order to maintain a healthy ecosystem (i.e. replenish the basin water which has accumulated waste material or has depleted its dissolved gas supply). Time dependent flows are the norm in most of these situations (tidal motion, atmospheric variability). The research is a combination numerical and experimental effort to examine these very complex, but important, flows.
Digital Image Processing of Fluid Flow and Mixing
Dr. William R. Lindberg, (1988-present)
The digital imaging capability of current computer systems has the potential for greatly improved methods of examining complex flow behavior. The combination of high resolution video, digital image capture and analysis enable the researcher to remotely measure velocity and concentration fields in fluid systems. We are in the process of developing or refining a number of techniques for particle image velocimetry (PIV) and laser induced fluorescence (LIF) based on this technology.