Practical Guides in Chemical Engineering are a cluster of short texts that each provides a focused introductory view on a single subject‎.‎ The full library spans the main topics in the chemical process industries that engineering professionals require a basic understanding of‎.‎ They are ‎'‎pocket publications‎'‎ that the professional engineer can easily carry with them or access electronically while working‎.‎ Each text is highly practical and applied‎,‎ and presents first principles for engineers who need to get up to speed in a new area fast‎.‎ The focused facts provided in each guide will help you converse with experts in the field‎,‎ attempt your own initial troubleshooting‎,‎ check calculations‎,‎ and solve rudimentary problems‎.‎ Dimensional Analysis provides the foundation for similitude and for up and downscaling‎.‎ Aeronautical‎,‎ Civil‎,‎ and Mechanical Engineering have used Dimensional Analysis profitably for over one hundred years‎.‎ Chemical Engineering has made limited use of it due to the complexity of chemical processes‎.‎ However‎,‎ Chemical Engine‎.‎‎.‎‎.‎