1. Department of Aerospace Engineering Texas A&M University 3409 TAMU College StationTX 77843‐3409 USA
2. Department of Macromolecular Science and Engineering Case Western Reserve University Cleveland OH 44106‐7202 USA
3. Artie McFerrin Department of Chemical Engineering Texas A&M University 3122 TAMU College StationTX 77843‐3122 USA