• MSX [SOURCES] limitations

    Hi, The SETPOINT and CONCEN soureTypes are quite bugged in the latest version of WaterGEMS and CAD (10.04.00.108). So far I had been able to function with workarounds to the bugs but now I've encountered a point I can't figure out a workaround for…
  • How to set Diameter units in MSX to meters

    G'day Team, Can someone please tell me how to change the MSX units for the pre-defined term 'D' from feet to meters? The MSX Manual states that Diameter can either be in Feet or Meters, however no-where does it say how to change it or what the unit…
  • A Multi-Species Decay Model to Support Cost-Effective Chlorination in Distribution Systems

    Why Model Chlorine Concentrations Accurately in Distribution Systems? Click the link below to read more from guest blogger Dr. Ian Fisher, Ph. D. - https://blog.virtuosity.com/a-multi-species-decay-model-to-support-cost-effective-chlorination-in-distribution…
  • Adding custom parameters and equations with Multi Species Extension (MSX)

    Product(s): WaterGEMS, WaterCAD Version(s): CONNECT Edition, V8i Area: Modeling Problem How can I define and use custom parameters and equations with Multi Species Extension (MSX), utilizing model parameters or results and…
  • How to include Mass Transfer Coefficient into MSX

    Hi Everyone, We're currently working on developing an MSX model for Chlorine Decay that can account for wall decay as a factor of Biofilm growth (thus removing the need to specify wall decay for specific pipes throughout the network). Unfortunately…
  • Error when running MSX - Could not solve reaction equilibrium expressions

    Product(s): WaterGEMS, WaterCAD Version(s): 10.XX.XX.XX Area: Calculations Problem When attempting to compute a model using the Multi Species Extension (MSX), the following error occurs: Could not solve reaction equilibrium…
  • Using Multi-Species Extension (MSX) for advanced water quality modeling

    Product(s): WaterGEMS, WaterCAD Version(s): CONNECT Edition, 08.11.05.61 and higher Area: Modeling This technote explains how to configure a Multi-species analysis (MSX) which is an advanced Water Quality Modeling extension.…
  • Mixing Chlorine and Chloramines

    Product(s): WaterGEMS, WaterCAD Version(s): CONNECTION Edition, V8i 08.11.05.61 and greater Area: Modeling Author: Dr. Tom Walski Background The problem with mixing chlorine (free chlorine, HOCl) with…