Experimental and Modelling Studies onLiquid-Liquid Slug Flow Capillary MicroreactorsZur Erlangung des akademischen Grades einesDr.-Ing.vom Fachbereich Bio- und Chemieingenieurwesen der Universit¨at Dortmundgenehmigte Dissertationvorgelegt vonM.Tech-Ing. Madhvanand N. KashidausSonand, IndiaTag der mu¨ndlichen Pru¨fung: 26.03.20071. Gutachter: Prof. Dr. David W. Agar2. Gutachter: Prof. Dr. Stefan TurekDortmund 2007Dedicated to My MotherIAcknowledgementIt is a great pleasure for me to acknowledge all the people who helped me to accom-plish this dissertation. First and foremost, I wish to express my deep felt gratitudetowards my supervisors, Prof. Dr.-Ing. David W. Agar and Prof. Dr. Stefan Turek,for giving me an opportunity to work in their groups. I am highly indebted fortheir insights, advice, encouragement, easy accessibility and freedom forwork whichhelped me to explore new ideas and to complete the work in time. I am thankful toboth of them for sharing ideas on many varied issues such as report writing, timemanagement, presentation techniques etc. which helped me to develop my personalskills as well. Thank you for being wonderful teachers! I would also like to thankchairman of the doctoral commission, Prof. Dr.-Ing. Jakob J¨orissen, and members,Prof. Dr.-Ing. Karl Strauß and Prof. Dr.-Ing. Eugeny Kenig, for evaluating mywork.