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MacroFlow

Flow Network Modeling (FNM) is a generalized methodology for calculating system-wide distributions of flow rates and temperatures in a network representation of a cooling system. Practical flow and cooling systems can be considered as networks of flow paths through components such screens, filters, fans and pumps, ducts, bends, orifices, heat exchangers, cold plates and heat sinks, power supplies, and card arrays.

The characteristics of these components in terms of their flow and thermal resistances can be obtained from handbooks, vender specs, or in-house testing. Their use in the FNM approach provides a fast and accurate prediction of the flow distribution and the resulting thermal performance of the system. Unlike CFD (Computational Fluid Dynamics), FNM employs overall characteristics of components instead of attempting to calculate a detailed distribution of velocity and temperature within a component. As a result, FNM is very fast in terms of model definition, computation, and examination of results.