http://sourceforge.net/p/dwsim/news/Recent changes to newsenSat, 08 Sep 2012 13:02:38 -0000http://sourceforge.net/p/dwsim/news/2010/02/dwsim-16-build-3676-released/Build 3676 fixes a lot of bugs and adds important features to DWSIM. What's new: - Napthali-Sandholm Simultaneous Correction (SC) method for rigorous column solving - New Flowsheet color scheme, improved connector drawing algorithm, faster object drawing - Expression support for the Sensitivity Analysis Utility - Support for performance & system curves in the Adiabatic Pump Updated documentation, samples and source code in VB.NET are also available for download in the "Files" section.Daniel MedeirosSat, 08 Sep 2012 13:02:38 -0000http://sourceforge.netb0dae5887d6766b66a977988b4e215ae20708410http://sourceforge.net/p/dwsim/news/2009/11/dwsim-16-beta-build-3605-released/DWSIM 1.6 Beta is now available for download. Here is the list of changes since build 3399: - [NEW] Added Spanish GUI translation (many thanks to Abad Lira and Gustavo León!) - [NEW] Added a Multivariate, Constrained Optimization utility - [NEW] Added a Sensitivity Analysis utility supporting up to 2 independent variables - [NEW] Added "command-line run mode" (read the documentation for more details) - [NEW] Added a 'Write to the Flowsheet' capability to the Spreadsheet - [NEW] New Property Packages: Chao-Seader, Grayson-Streed, Modified UNIFAC (Dortmund) and Peng-Robinson with support for immiscible water and Volume Translation - [NEW] New Energy Recycle unit operation - [NEW] Added more units for the most common properties (temperature, pressure, etc.) - [NEW] Added code to display a message when the flash algorithm converges to the trivial solution - [CHG] Redesigned UNIFAC group structure to include all available groups - [CHG] Report can now show all properties from all objects in the flowsheet - [CHG] Removed single-phase and phase change limitations from the Heat Exchanger - [CHG] Property Package selection interface now groups packages by type - [CHG] Changed component selection interface - [FIX] Fixed bugs and made minor changes to the code/interface The documentation was updated (only in English from now on...) and I've added more samples to show you some of the new features. More will come later. Since this is a "beta" release, it continues to rely on users in order to fix bugs and mistakes, which I hope aren't that much this time. I hope you like this build, as I put too much effort to make it happen this time. ;-) /DanielDaniel MedeirosSat, 08 Sep 2012 13:02:38 -0000http://sourceforge.nete396315fe3c0abd6cb208e5467bd6846a5eb9de3http://sourceforge.net/p/dwsim/news/2009/08/blog-updated/DWSIM's Blog was updated with a quick preview of the new features which will be available in the next build. Visit http://dwsim.inforside.com.br/blog for more details.Daniel MedeirosSat, 08 Sep 2012 13:02:38 -0000http://sourceforge.net1672d6dafb25ae122b5a5cae9c0606e147c6b9a2http://sourceforge.net/p/dwsim/news/2009/04/dwsim-15-beta-build-3399-released/This one was fast. I just found an error in the calculation of the ideal gas enthalpy/entropy for ChemSep/CheResources components that affects all unit ops' heat balances, so it just couldn't wait. Other fixes were included as usual. I also created a new simulation file reproducing the PS Azeotropic Distillation (Methanol/Acetone) case built by Harry Koojiman for the COCO simulator. Go to the download page (https://sourceforge.net/project/showfiles.php?group_id=233626) to get the files.Daniel MedeirosSat, 08 Sep 2012 13:02:38 -0000http://sourceforge.neta23ba3b94b653efddfb92c6ecb5d61c49b096a71http://sourceforge.net/p/dwsim/news/2009/04/dwsim-15-beta-build-3398-released/This updated v1.5 build fixes some bugs reported by users and others found during testing sessions. New features include: - Component volumetric flow /fraction information in Material Streams; - The possibility to choose how the liquid density should be calculated with EOS-specific Property Packages - use the EOS itself or the Rackett equation. This decision directly affects the calculation of partial volumes (used for the calculation of the volumetric fractions/flows).Daniel MedeirosSat, 08 Sep 2012 13:02:38 -0000http://sourceforge.netf4284a5a4a2071b4b98aeb0c66831fdbcd3f0003http://sourceforge.net/p/dwsim/news/2009/04/dwsim-15-beta-build-3377-released/DWSIM Build 3377 was released yesterday and adds important features to the Calculator, like 'abort calculation' and 'recalculate flowsheet'. Some bugs were also fixed, as usual. Because of the changes needed to implement the new features, the interface became even more responsible during calculation. Check it out!Daniel MedeirosSat, 08 Sep 2012 13:02:38 -0000http://sourceforge.net957e5ade7af2523b8879bc6e1b7b4fdbbda841dahttp://sourceforge.net/p/dwsim/news/2009/03/dwsim-15-beta-build-3372-released/DWSIM v1.5 beta build 3372 is available for download. This is just a maintenance release with some bug fixes and optimizations. Most important corrections are in the calculation of viscosity and surface tension of liquid mixtures. Also, the components that are missing some important data (like acentric factor and critical compressibility) in the CheResources database are now marked in red for your convenience. The source code was updated and can be compiled with Visual Basic 2005 Express Edition (free), Visual Basic 2008 Express Edition (free) or SharpDevelop (open source).Daniel MedeirosSat, 08 Sep 2012 13:02:38 -0000http://sourceforge.net251b4bbccce1eeb49aec0dd3d5d65f028082663bhttp://sourceforge.net/p/dwsim/news/2009/03/dwsim-15-beta-released/DWSIM 1.5 Beta is now available for download. Here is the list of changes since version 1.4: - [NEW] Redesigned component database system - [NEW] Added two new Property Packages: NRTL/Peng-Robinson and UNIQUAC/Peng-Robinson - [NEW] Added support for loading ChemSep(TM) databases - [NEW] Added a tool to characterize petroleum fractions from ASTM/TBP distillation curves - [NEW] Added a tool to insert user-defined components - [NEW] Added the ability to use multiple property packages in a single simulation - [NEW] Dockable help window with localized tips - [NEW] New Unit Operations: Distillation Column, Absorption Column, Refluxed Absorber and Reboiled Absorber - [NEW] Rigorous Column solving methods: Bubble-Point, Sum-Rates and Inside-Out - [NEW] New utility for calculation of Petroleum Cold Flow Properties - [CHG] Surface Tension is now correctly listed as a liquid phase property - [CHG] Redesigned splash and welcome screens - [BUG] Fixed high-pressure vapor viscosity calculation - [BUG] Fixed liquid viscosity calculation error when supercritical components are present - [BUG] Fixed flash calculation vapor fraction initialization error (should avoid some impossible solutions) - [BUG] Fixed culture-specific error related to Property Package parameter storage - [BUG] Fixed calculation of vapor phase thermal conductivity - [BUG] Fixed a bug in internal calculation of heat capacity ratio - [BUG] Fixed MRU filelist The documentation was updated and I've added some samples to show you some of the new features. More will come later. Since this is a "beta" release, It would be good to get some feedback from the users in order to fix the most critical bugs. One of them would be the connections between streams and unit operations, which is not working 100% yet, although it has been improving on every release. In the next days I'll be adding some content to the new Wiki (http://apps.sourceforge.net/mediawiki/dwsim/), so stay tuned for tips and tricks, roadmaps and a tutorial on how to load a ChemSep database on DWSIM.Daniel MedeirosSat, 08 Sep 2012 13:02:38 -0000http://sourceforge.net6c218a1ed623bf3a2946950a3b379fd74fe546dchttp://sourceforge.net/p/dwsim/news/2008/11/dwsim-14-released/DWSIM version 1.4 is now available for download. Major changes include the addition of three new unit operations (Equilibrium Reactor, Shortcut Column and Heat Exchanger [basic]) and three utilities (PSV/Vessel sizing and Spreadsheet). The documentation is not up-to-date (lost my Lyx installation), so it will probably be updated only in the 1.5 version release, which shouldn't take too long and will include a Rigorous Column unit operation. For now, those who are interested in the new unit ops, please let me know of any bugs and problems you may encounter as I didn't have time to test them as I would like. /DanielDaniel MedeirosSat, 08 Sep 2012 13:02:38 -0000http://sourceforge.net7176a5d09ce83251ef714431b1fc71b53c2dd6aehttp://sourceforge.net/p/dwsim/news/2008/09/latest-svn-updates-amp-more/The latest SVN update contains important bug fixes to the True Critical Point utility. In case you haven't noticed, Prof. Cartaxo also included a basic implementation of the Heat Exchanger Unit Operation. You can also find among the Property Packages an initial implementation of Michelsen's stability algorithm, which, hopefully, will evolve to a full Multiphase Property Package for DWSIM. Stay tuned! Daniel MedeirosSat, 08 Sep 2012 13:02:38 -0000http://sourceforge.net0523878f39cb6f0e785e954e2337e38aaf5e10d3