Special Issue: In Memoriam of Professor Clayton T. Crowe

Abstract

Professor Clayton T. Crowe of Washington State University (WSU) made seminal contributions in the discipline of Fluids Engineering, starting with his early work on solid fuel combustion for rocket launching applications. In the mid1970s he developed and applied the now wellknown particlein cell model, where a droplet phase is a source of mass, momentum, and energy for the gaseous phase. He then worked with his WSU colleague Dave Stock in developing computational methods for predicting the performance of electrostatic precipitators and cyclone separators. Spray drying has been an enduring part of his research work and a motivation for developing a number of modeling and numerical procedures to capture the thermal and momentum coupling between the dispersed and carrier phases. Since the mid1980s, Clayton was devoted to tackling some of the very fundamental issues of twophase dispersed flows. He contributed to the theory of twofluid modeling and how one obtained the “continuumâ€‌ equations for high dispersed phase volume fractions from the various averaging procedures. He wrote very lucidly on this subject and much of this formed the appendices in his Multiphase Flows with Droplets and Particles book. He was also interested in the carrier phase turbulence, in particular turbulence modulation caused by suspended particles and particle segregation. While contributing significantly in research, he was also an excellent teacher. He received several excellenceinteaching awards and his undergraduate book Engineering Fluid Mechanics (coauthored with several other of his colleagues) has been one of the most popular undergraduate fluid mechanics textbooks for over 35 years. He received the “Fluids Engineering Awardâ€‌ from the ASME and the “Senior Multiphase Flow Awardâ€‌ in the 2001 International Conference on Multiphase Flow (ICMF).