Impedance Relationship – Thermal Design

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Obstructions in the airflow path cause static pressure within the enclosure.
To achieve maximum airflow, obstructions should be minimized. However,
obstructions in the form of baffles may be necessary to direct the airflow
over the components that need cooling.  Impedance Relationship Curve for an Electronics EnclosureThe figure shows the nonlinear relationship between airflow and
static pressure for a typical fan.