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From: Hazem <haz...@ho...> - 2016-08-26 17:22:54
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Darius,The use of Yaws should be a last resort. It is strongly believed that he took shortcuts. Regards,Hazem Date: Fri, 26 Aug 2016 06:57:47 -0700 From: dhk...@gm... To: op...@go... CC: ops...@li...; ops...@li...; ops...@li...; haz...@ho... Subject: Re: A new physical properties library for OpSim Thanks! Will have a look at it over the weekend. -- You received this message because you are subscribed to the Google Groups "Open source Process Simulator" group. To unsubscribe from this group and stop receiving emails from it, send an email to ops...@go.... To post to this group, send email to op...@go.... Visit this group at https://groups.google.com/group/opsim. For more options, visit https://groups.google.com/d/optout. |
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From: Hazem <haz...@ho...> - 2016-08-26 11:55:32
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There are several tabs in this spreadsheet. Tab "4th" has the database in the 4th edition of the properties of gases ad liquids while tab 5th contains a combined list of the databases in the 4th edition and the 5th edition. See notes at the bottom of tab "5th" and let me know if you have any questions. The tab DIPPR contains DIPPR components as published in Perry's. The rest of the tabs contain regression analysis I tried to do myself.Regards,Hazem Date: Thu, 25 Aug 2016 23:53:54 -0700 From: dhk...@gm... To: op...@go... CC: ops...@li...; ops...@li...; ops...@li...; haz...@ho... Subject: Re: A new physical properties library for OpSim Hi Matt and Hazem, It would be great to receive something in electronic format preferably. The properties are stored in JSON format which is human readable and can easily be written to by a script.I am working on a GUI, but I realize that for bulk work perhaps an excel file would be more appropriate for faster manipulation and reading of tables from another excel spreadsheet. The original JSON files were also created by me via an excel file, therefore I will see if I can find this file this afternoon and commit it to trunk so others can use it as well. The prop definition files are located here: https://sourceforge.net/p/opsim/code/HEAD/tree/trunk/src/engine/physprops/components/ Regards, Darius -- You received this message because you are subscribed to the Google Groups "Open source Process Simulator" group. To unsubscribe from this group and stop receiving emails from it, send an email to ops...@go.... To post to this group, send email to op...@go.... Visit this group at https://groups.google.com/group/opsim. For more options, visit https://groups.google.com/d/optout. |
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From: Hazem <haz...@ho...> - 2016-08-25 17:55:29
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I can give you that in an Excel spreadsheet Date: Thu, 25 Aug 2016 09:28:18 -0700 From: nw...@gm... To: op...@go... CC: ops...@li...; ops...@li...; ops...@li... Subject: Re: A new physical properties library for OpSim I havn't had a chance to look at OpSim recently, but you mentioned sources for Physical Properties. When I was working on OpSim, I purchased a copy of "Properties of Gases & Liquids, 5th ed" by Reid, Prausnitz and Poling for the Physical properties correlations. If/When I get time, I will see if there are some that i can enter. What format is this information stored in? Also, if you would like any of the data I can scan and send tables to you. Matt Henley On Saturday, August 20, 2016 at 5:20:52 AM UTC-5, Darius Blaszyk wrote:Hi all, I just uploaded a new post on the OpSim website regarding the physical property library for OpSim. http://opsim.sourceforge.net/?p=89 Have fun reading and please comment! Regards, Darius -- You received this message because you are subscribed to the Google Groups "Open source Process Simulator" group. To unsubscribe from this group and stop receiving emails from it, send an email to ops...@go.... To post to this group, send email to op...@go.... Visit this group at https://groups.google.com/group/opsim. For more options, visit https://groups.google.com/d/optout. |
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From: Darius B. <dhk...@gm...> - 2016-08-25 09:14:34
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Hi all, I'm pleased to announce a new monthly update on the OpSim website. Enjoy reading! Http://www.opsim.cc Regards, Darius |
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From: Darius B. <dhk...@gm...> - 2016-08-20 10:20:57
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Hi all, I just uploaded a new post on the OpSim website regarding the physical property library for OpSim. http://opsim.sourceforge.net/?p=89 Have fun reading and please comment! Regards, Darius |
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From: Darius B. <dhk...@gm...> - 2016-08-19 09:59:48
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Hi all, I just uploaded a new post on the OpSim website regarding the new interface for OpSim. http://opsim.sourceforge.net/?p=130 Have fun reading and please comment! Regards, Darius |
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From: Darius B. <dhk...@gm...> - 2016-08-08 13:21:57
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Hi all, I just uploaded a new post on the OpSim website regarding the new build system that will be used. Have fun reading and please test and comment! Regards, Darius |
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From: Matt H. <nw...@gm...> - 2016-05-05 15:54:13
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Thanks Darius, I downloaded from SVN and compiled over the weekend. So far I haven't been able to get Firebird running (the ebuild in gentoo doesn't like the classic version) but everything compiles ok. No need to write an article.. i was just curious. I am following the development and applaud your efforts. On Thu, May 5, 2016 at 9:41 AM, Darius Blaszyk <dhk...@gm...> wrote: > Hi Matt, > > Thanks for your message. I can't really comment on what happened in the > past as I was not involved. Sorry for the frustrations, but I have been > there myself. It's never easy working in teams, let alone in such volatile > environments like open source. To maintain quality in OpSim development and > keep people involved I find this to be one of my main tasks to concentrate > on after I firm up the foundation of the code. In my opinion a more > structured approach, demonstrated in my work towards modularizing OpSim, > and posting articles on progress (and later on decent proposals and reviews > regarding changes of the code), will lead to a better alignment of the team > (once / if there will be volunteers to join :) ). > > Regarding your question on classes vs records, please check my WIP branch > on sourceforge: > https://sourceforge.net/p/opsim/code/HEAD/tree/branches/opsim_darius/classes/ > > There's a readme in that folder with some test results. The overall > conclusions are pasted in below in this e-mail You can check the test out > from SVN and try for yourself if you like. I was not planning on writing an > article on this, unless there will be requests. > > Regards, Darius > > The results from these tests indicate that records take up about 30-45% less RAM. Creating records is 1,5 to 6 times faster and assigning values is 2.3 to 4 times faster. The creation time is less critical as this is typically done once (when loading a file) for large amounts and the overall time is relatively short for both methods. However assigning values is done regularly by the solver and in great amounts and can amount to a noticeable or even annoying lag of the UI. Also the amount of memory used is important as large models can lead to memory paging which lead to a significant drop in performance. > > -- > You received this message because you are subscribed to the Google Groups > "Open source Process Simulator" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to ops...@go.... > To post to this group, send email to op...@go.... > Visit this group at https://groups.google.com/group/opsim. > For more options, visit https://groups.google.com/d/optout. > |
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From: Matt H. <nw...@gm...> - 2016-05-03 21:47:53
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Hi Darius, I watch for your commit notices and am excited that someone has taken the time to pick up the code and try to do something useful with it. I agree with Hazem that the experience in working on a project that failed was frustrating and painful. Glad to hear your thoughts on firebird. I understand the reasoning behind the decision to use it, but looking back, I think that it was a big mistake. We spent a lot of time helping people get it working with zeoslib for very little return.. Its overkill for what we were trying to do and a set of dependencies that even now are a pain. Do you have any links to articles explaining the situation between classes and records with respect to resources and speed? I do very little programming these days but I didn't know there was a substantial difference in speed. matt On Tue, May 3, 2016 at 12:13 PM, Darius Blaszyk <dhk...@gm...> wrote: > Hi Hazem, > > First of all, too bad you are unemployed now, hope you can soon find the > job you are looking for. As for your comments. I can understand some of > your frustrations. It's always difficult to get things done your way when > working with a (distributed) group like an open source group. I share your > frustration regarding that. I'm lucky now in a sense that no active > developers are working on OpSim anymore and I can pretty much decide on my > own, although I still discuss features and ideas with Samuel, which is the > last left of the originators. > > I have now decided to split OpSim up into libraries (such as unit > conversion, chemical formula and soon to merge into trunk physical > properties). This way we can have multiple maintainers working on portions > of the code without much interference on the overall code base. Regarding > some decisions for OpSim like the use of Firebase I have to fully agree > with you. I also think that this was a rather unhappy decision and I am > planning to revert this. However not because it's beta software as you > describe (which it's not afaik) but rather because of the unneeded > dependencies that were added to the application and complexity in the > usage. It will take longer but in the end OpSim will benefit more with it's > own file format. I'm working on the code and an article describing the > rationale behind it. If time permits this will be merged to trunk and > posted on the website within a few months. BTW: most of the current code in > trunk is planned to be refactored and rewritten in favor of a more modular > approach. > > I do hope to share some thoughts with you soon about your ideas on the > modular way of solving model equations. You wrote an article some time ago > and posted it here. I found it very interesting and would like to discuss > this with you more in detail. Would this interfere with your other work? If > not then please let me know. I already have a basic working equation solver > in branches but this is very basic indeed. Always appreciate help with some > good ideas! > > Regards, Darius > > -- > You received this message because you are subscribed to the Google Groups > "Open source Process Simulator" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to ops...@go.... > To post to this group, send email to op...@go.... > Visit this group at https://groups.google.com/group/opsim. > For more options, visit https://groups.google.com/d/optout. > |
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From: Darius B. <dhk...@ze...> - 2016-04-27 15:56:10
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Hi all, I've posted the monthly update for OpSim on the website: http://opsim.sourceforge.net/. Please share your thoughts and comments either here or on the website! Regards, Darius |
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From: Darius B. <dhk...@ze...> - 2016-04-16 07:00:14
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This is the first post to the new users mailing-list. The main purpose of this list to discuss usability issues for OpSim. If you have any questions or remarks, feel free to post them here. Regards, Darius |
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