Non-aqueous Phase Liquid (NAPL) Simulator

NAPL Simulator conducts a simulation of the contamination of soils and aquifers that results from the release of organic liquids commonly referred to as nonaqueous-phase liquids (NAPLS). The simulator is applicable to three interrelated zones: a vadose zone that is in contact with the atmosphere, a capillary zone, and a water-table aquifer zone. Three mobile phases are accommodated: water, NAPL, and gas. The three-phase k-S-P sub-model accommodates capillary and fluid entrapment hysteresis. NAPL dissolution and volatilization are accounted for through rate-limited mass transfer sub-models.

The numerical solution is based on a Hermite collocation finite element discretization. The simulator provides an accurate solution of a coupled set of non linear partial differential equations that are generated by combining fundamental balance equations with constitutive thermodynamic relationships.

This model is available in both two-dimensional and three-dimensional version.

Specifications

Version	2.0
Release Date	November 2010
Operating System	DOS

Downloads

US EPA. (1997) "NAPL: Simulator Documentation." Publication NO. EPA/600/R-97/102.  Document Revisions (zip) (10.77 MB)

1-D File

NAPL 1-Dimensional DOS Tutorial (zip) (881.46 KB)

2-D Files

NAPL 2-D DOS Source Code (zip) (337.25 KB)

NAPL 2-D DOS Example Files 1 (zip) (215.59 KB)

NAPL 2-D DOS Example Files 2 (zip) (233.06 KB)

NAPL 2-D DOS Example Files 3 (zip) (219.23 KB)

NAPL 2-D DOS Example Files 4 (zip) (262.84 KB)

NAPL 2-D DOS Example Files 5 (zip) (282.1 KB)

NAPL 2-D DOS Example Files 6 (zip) (436.85 KB)

NAPL 2-D DOS Example Files 7 (zip) (289.48 KB)

3-D Files

NAPL 3-D DOS Source Code (zip) (375.3 KB)

NAPL 3-D DOS Example Files (zip) (298.13 KB)