Thermal and Fluid Dynamic Performance of Pin Fin Heat Transfer Surfaces Der Technischen Fakultät der Universität Erlangen-Nürnberg zur Erlangung des Grades DOKTOR-INGENIEUR vorgelegt von Naser Sahiti Erlangen, 2006 Als Dissertation genehmigt von der Technischen Fakultät der Universität Erlangen-Nürnberg Tag der Einreichung: 17. Oktober 2005 Tag der Promotion: 27. Januar 2006 Dekan: Prof. Dr.-Ing. A. Leipertz Berichterstatter: Prof. Dr. Dr. h. c. F. Durst Prof. Dr.-Ing. W. Arlt Ass. Prof. Dr. A. Dewan Acknowledgments During my work on the present thesis I have been fortunate to interact with many people who helped me in one way or another to complete this project. It gives me great pleasure to have the opportunity to address my special thanks to them. First of all I express my deepest thanks to my supervisor, Prof. F. Durst, who gave me the op-portunity to finish the thesis in his institute. His creative ideas, encouragement and valuable criticism have profoundly contributed to the completion of the present thesis. I remain greatly indebted to him for his permanent guidance and his continuing disposition in discussing various aspects of the work. I express special thanks to Prof. W. Arlt and Prof. A. Dewan for their willingness to write evaluations of my thesis. Thanks are due to Prof. A.