Flow visualizations of perpendicular blade vortex interactions

Helium bubble flow visualizations have been performed to study perpendicular interaction of a turbulent trailing vortex and a rectangular wing in the Virginia Tech Stability Tunnel. Many combinations of vortex strength, vortex-blade separation (Z(sub s)) and blade angle of attack were studied. Photographs of representative cases are presented. A range of phenomena were observed. For Z(sub s) greater than a few percent chord the vortex is deflected as it passes the blade under the influence of the local streamline curvature and its image in the blade. Initially the interaction appears to have no influence on the core. Downstream, however, the vortex core begins to diffuse and grow, presumably as a consequence of its interaction with the blade wake. The magnitude of these effects increases with reduction in Z(sub s). For Z(sub s) near zero the form of the interaction changes and becomes dependent on the vortex strength. For lower strengths the vortex appears to split into two filaments on the leading edge of the blade, one passing on the pressure and one passing on the suction side. At higher strengths the vortex bursts in the vicinity of the leading edge. In either case the core of its remnants then rapidly diffuse with distance downstream. Increase in Reynolds number did not qualitatively affect the flow apart from decreasing the amplitude of the small low-frequency wandering motions of the vortex. Changes in wing tip geometry and boundary layer trip had very little effect

A Chromosome Frequency Test for Linkage of the Rhesus Blood Factors

Author Institution: The Ohio State University, Columbus, Ohi

The Genetics of Certain Common Variations in Coleus

Author Institution: The Ohio State University, Columbus, Ohi

Gastrojejunocolic fistula

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/32608/1/0000749.pd

A Series of Five Multiple Alleles

Author Institution: The Ohio State University, Columbus 10, Ohi

Simple Modes of Inheritance and the Study of Twins

Author Institution: The Ohio State Universit

Initiating New Community and Field Education Partnerships: The Congregational Social Work Education Initiative

At the start of a new academic year in August 2007, the Joint Master of Social Work Program in Greensboro, North Carolina, launched a new field education venture – The Congregational Social Work Education Initiative (CSWEI).  North Carolina Agricultural & Technical State University (NCA&TSU) and the University of North Carolina at Greensboro (UNCG) created and operate a single master of social work program which opened in 1997.  The universities have a rich history of cooperation with managing a joint undergraduate social work internship program since 1978. The Council on Social Work Education has identified that field education as the signature pedagogy for social work education.  The success of any field education experience is dependent upon having students complete their field education experience within community- based programs and services.   However, such training opportunities have changed, which has placed more pressure in locating quality field educational sites or in the development of new models