An experimental determination of combustibility

The author describes a laboratory method for determining ignitability, rate of heat release, and total heat release as a measure of the combustibility of materials. The results may be applied to building design and designation of contents with an eye towards reducing the possibility of a major fire. Note: Professor Smith is Director of Chemical Engineering Research, Engineering Experiment Station, The Ohio State University, Columbus, Ohio.     

Changing trends in detergents

In the enormously large and varied field of cleaning agents, a review of the changing trends in the field once held chiefly by soaps. and a few chemicals, is of interest. The author has summarized the general theory and ways of preparing many of the new detergents and has indicated the direction of future research to provide many more products which will serve as agents along side of, or as substitutes for many of the old ones.     

Referate

Ohne Zusammenfassung     

Referate

Ohne Zusammenfassung     

Numerical study on particle motions in swirling flows in a cyclone separator

The purpose of this study is to establish the high-accurate prediction method of particle separation in a cyclone separator. Numerical simulation of the swirling flows in a cyclone separator is performed by using a large eddy simulation (LES) based on a Smagorinsky model. The validity of the simulation and the complicated flow characteristics are discussed by comparison with experimental results. Moreover, particle motions are treated by a Lagrangian method and are calculated with a one-way method. A performance for particle separation is predicted from the results of the particle tracing. As results of our investigation, the influences of the inserted height of the outlet pipe on the performance for particle separation of cyclone separator are shown.