Cornell Mixing Zone Expert System (CORMIX)

MS-DOS/NT N/A Sept. 1998 Yes (PDF/WP) OGI   Cornell Mixing Zone Expert System (CORMIX) can be used for the analysis, prediction, design of aqueous toxic or conventional pollutant discharges into diverse waterbodies. CORMIX is a USEPA approved rule-base and simulation methodology for turbulent buoyant jet mixing behavior which covers a majority of common discharge and environmental conditions. CORMIX classifies momentum and buoyancy of the discharge in relation to boundary conditions to accurately predict mixing behavior. Major emphasis is on prediction of plume geometry and dilution characteristics within a receiving water's initial mixing zone so that compliance with regulatory constraints can be judged. It also predicts discharge plume behavior at larger distances.   CORMIX is an IBM-PC based DOS application of approximately 2000 mixing rules linked to a hydrodynamic simulation model. CORMIX was developed for USEPA NPDES water quality permit mixing zone predictions, and can be applied to a broad range of mixing problems. CORMIX can predict mixing behavior from diverse discharge types ranging from power plant cooling waters, desalinization facility or drilling rig brines, municipal wastewater, or thermal atmospheric plumes. CORMIX can also be applied across a broad range of ambient conditions ranging from estuaries, deep oceans, swift shallow rivers, to stratified reservoirs. Some special features of CORMIX include: Near-field and far-field plume trajectory, shape, concentration, and dilution predictions. Alerts user when plume encounters regulatory constraints, including Toxic Dilution Zone CMC and CCC values. Application to unsteady ambient currents/tides or stagnant conditions. Graphical display of plume dimensions and concentration. Prediction of plume boundary attachments/interactions. Prediction of stratified atmospheric plumes with skewed wind velocity. Prediction of density current behavior with buoyant wedge/upstream intrusion. CORMIX has 3 sub-systems which depend upon source discharge characteristics. These subsystems are listed below. CORMIX1-Single Port Submerged Outfalls Subsystem CORMIX1 deals with buoyant submerged single port discharges into flowing unstratified or stratified water environments, such as rivers, lake, estuaries, and coastal waters. It includes the limiting cases of non-buoyant and negatively buoyant discharges and of stagnant ambient conditions. It also deals with tidal reversing flow conditions and arbitrary ambient density current profiles. CORMIX2- Multiport Submerged Outfalls Subsystem CORMIX2 deals with buoyant submerged multiport diffuser discharges into similar environments and with similar limiting cases. CORMIX3- Surface Buoyant Discharge Subsystem CORMIX3 deals with buoyant surface discharges into similar environments. However, it is constrained to positively buoyant (or non-buoyant) discharges. While CORMIX was originally developed under the assumption of steady ambient conditions, current version also allows application to highly unsteady environments, such as tidal reversal conditions, in which transient recirculation and pollutant build-up effects can occur. Two post-processing models are linked to the CORMIX system, but can also be used independently. These are CORJET (the Cornell Buoyant Jet Integral Model) for the detailed analysis of the near-field behavior of buoyant jets, and FFLOCATR (the Far-Field Plume Locator) for the far-field delineation of discharge plumes in non-uniform river or estuary environments. The user's manual gives a comprehensive description of the CORMIX system; it provides guidance for assembly and preparation of required input data for the three subsystems; it delineates ranges of applicability; it provides guidance for interpretation and graphical display of system output; and it illustrates practical system application through several case studies. File Size Download CORMIX model system & user manual (without figure and table files) in WP format 1.02 MB CORMIX User Manual in PDF format 1 MB CORMIX Technical Report in PDF format 1 MB