Kedar Naik and Joe Lubinski, seniors in ME, placed 2nd in the Physical Sciences Division of the USC's 11th Annual Undergraduate Symposium for Scholarly and Creative Work, held this year on April 15, for their AME 441 (Senior Lab) project on modifications of heat transfer due to tube oscillations in cross-flow heat exchangers.

A cross-flow heat exchanger is a series of smaller tubes running crosswise through a larger tube for the purpose of exchanging heat between fluids in the smaller and the larger tubes. Vortices shed as fluid in the larger tube flows across the smaller tubes can induce vibration in the smaller tubes. Naik and Lubinski measured the heat transfer coefficient due to streamwise oscillations for 77 different oscillation conditions and observed notable enhancements in heat transfer for oscillations at the Strouhal frequency (the natural vortex shedding frequency) and at its 2^nd harmonic as well as an amplitude dependence.

	Kedar Naik and Joe Lubinski display their award certificates after taking second place in the USC 11th Annual Undergraduate Symposium for Scholarly and Creative Work.

The USC Annual Undergraduate Symposium for Scholarly and Creative Work is held each Spring, offering students from different disciplines around the University an opportunity to showcase their significant work. Students submit their work—in this case, a poster presentation—the day before the symposium for private evaluation by a panel of faculty judges, and then display their work publicly the next day on Trousdale Parkway. Naik and Lubinski were one of the thirty-two entries in the category Physical Sciences, Mathematics and Engineering.

Naik and Lubinski were advised by Prof. T. Pottebaum; Dr. Yen-Lin Han who taught AME 441; and Prabu Sellappan, graduate assistant.