VLEFlash 4.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The program's installer file is commonly found as VLEFlash.exe. We recommend checking the downloaded files with any free antivirus. This software was originally developed by Flow Phase Inc. The most popular version of the tool 4.0. The program lies within Education Tools, more precisely Science Tools.
From the developer:
VLEFlash is a Win32 application developed by Flow Phase Inc. for the prediction of thermodynamic and transport properties. And the drawing of phase envelope and vapour fraction lines of fluid mixture. It can be used for pure fluids or for mixtures of up to 20 components selected from the database of 215 components, mostly hydrocarbons.
You may want to check out more software, such as VLE Flash, which might be similar to VLEFlash.