Chemistry and Chemical Engineering

  Chemical Engineering   Shell Momentum Balance Methods of Shell Momentum Balance Shell Momentum Balance •       In fluid mechanics   it may be necessary to determine how a fluid velocity changes across the flow. This can be done with a  shell balance . •       A shell is a differential element of the flow. By looking at the momentum and forces on one small portion, it is possible to integrate over the flow to see the larger picture of the flow as a whole. •       The balance is determining what goes into and out of the shell. Momentum enters and leaves the shell through fluid entering and leaving the shell and through shear stress. In addition, there are pressure and gravity forces on the shell. •       The goal of a shell balance is to determine the velocity profile of the flow. The ve...

  Basic Chemical Engineering   Introduction to unit operation and unit processes Unit operations ·          A unit operation is a basic stage in a chemical engineering process that involves bringing a physical change, such as separation, crystallization, evaporation, filtering, and so on. ·          Unit Operations provides an overview of the physics behind specific physical operations, equipment design, building materials, and the operation and computation of numerous physical metrics (mass flow, heat flow, mass balance, power and force etc). There are five types of chemical engineering unit operations: 1.       Transportation of fluids, filtration, and solids fluidization are all examples of fluid flow processes. 2.       Evaporation and condensation are examples of heat transmission mechanisms. 3.     ...