# EPANET: [MIXING]

[MIXING]

Purpose:

Identifies the model that governs mixing within storage tanks.

Format:

One line per tank containing:

- Tank ID label
- Mixing model (MIXED, 2COMP, FIFO, or LIFO)
- Compartment volume (fraction)

Remarks:

1. Mixing models include:
   - Single compartment, complete mix model ( MIXED )
   - Two-compartment complete mix model ( 2COMP )
   - Plug flow, first in, first out model ( FIFO )
   - Stacked plug flow, last in, first out model ( LIFO )
2. The compartment volume parameter only applies to the two-compartment model and represents the fraction of the total tank volume devoted to the inlet/outlet compartment.
3. The [MIXING] section is optional. Tanks not described in this section are assumed to be completely mixed.

Example:

[MIXING]
;Tank Model
;-----------------------
T12 LIFO
T23 2COMP 0.2