1. Aerospace Engineer, National Aeronautics and Space Administration (NASA) Glenn Research Center, Fluid Physics and Transport Branch, Mail Stop 77-5, 21000 Brookpark Rd., Cleveland, OH 44135 (corresponding author).
2. Research Assistant, Dept. of Civil Engineering, Case Western Reserve Univ., 2104 Adelbert Rd., Cleveland, OH 44106-7201.
3. Summer Faculty, National Aeronautics and Space Administration (NASA) Glenn Research Center, Fluid Physics and Transport Branch, 21000 Brookpark Rd., Cleveland, OH 44135.
4. Aerospace Engineer, National Aeronautics and Space Administration (NASA) Glenn Research Center, Fluid Physics and Transport Branch, Mail Stop 110-3, 21000 Brookpark Rd., Cleveland, OH 44135.