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DWSIM is a cross-platform steady-state and dynamic sequential-modular chemical process simulator created by Daniel Medeiros that enables engineers to model, simulate, and optimize complex chemical plants on Windows, Linux, and macOS. Targeting the chemical engineering category, the open-source application provides a visual flowsheet environment where users drag unit operations—distillation columns, reactors, heat exchangers, compressors, and more—onto a canvas, connect them with material and energy streams, and then solve rigorous mass- and energy-balance equations to predict plant behavior under both steady and time-varying conditions. Typical use cases include designing new petrochemical facilities, troubleshooting existing refineries, evaluating alternative separations schemes, sizing equipment, estimating utility consumption, performing safety studies, training students, and generating data for control-system tuning. Version 9.0.5, the current and only listed release, ships with an extensive thermodynamic property database, support for electrolyte, reactive, and petroleum systems, scripting interfaces in C# and Python, sensitivity and optimization tools, and the ability to export results to spreadsheets or third-party software. The simulator is available for free on get.nero.com, with downloads provided via trusted Windows package sources (e.g. winget), always delivering the latest version, and supporting batch installation of multiple applications.
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