Mixer
Introduction
The mixer allows a number of stream to be combined together.
Mixer Dynamics
In dynamics mode, the mixer naturally supports reverse flow for any stream. The mixer will mix all steams to it that are effectively feeds (feed attachments with flow rate greater than or equal to zero, and the product if its flow rate goes negative), and the result will be propagated to all effective products.
One setting is provided on the Dynamics page. It is recommended that only the Equalize All option be used, as this is the most natural setting. The mixer is really just a small mixing point and at the point where the streams actually mix, they all really have the same pressure. Note that with this option streams may still show very different pressures, due the nozzle elevations and static head contributions and the fact that a stream is a sampling point located where it is a product attachment, as explained in the basics.
The Set Outlet to Lowest Inlet should not be used, since it only makes sense in steady state where some equipment is not modeled and hence some pressure changes are ignored by using this option. Dynamics will still try to comply with this option, but will continue to apply the effective option in place at the time when the integrator is started.