On the other hand, a fluid motion problem may require improved convective heat transfer coefficients to facilitate heat removal from a reacting fluid. For example, a typical blending problem may require the mixing to uniformity of fluids having dissimilar viscosity, density or concentration. The design procedure for blending and motion applies to agitation problems where fluids behave as a single phase and where a predictable level of fluid motion must occur. Here, we will limit our discussion to procedures for blending and motion up to and including design of the impeller system. We will review the mechanical design of drives, shafts and seals, and economic evaluations, in future articles of the series. This illustration represents a portion of the overall logic flow diagram originally presented in part one of this series. To understand the need for an organized approach to design, we will follow steps shown in the logic flow diagram of Figure 1 in deciding on an agitator for blending-and motion-problems.
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