Flowstead v2.0.3

Flowstead v2.0.3 (app version 2.0.3).

More accurate NRTL and UNIQUAC energy balances; liquids no longer reported as vapour

• NRTL and UNIQUAC now take liquid enthalpy and heat capacity from each compound's experimental liquid heat capacity, as DWSIM 10 does. Before, liquid water came out with a heat capacity of 5.35 kJ/kg·K instead of 4.18, so liquid heating and cooling duties with these packages were about 28 % too high. Stream enthalpies are now measured from liquid at 25 °C, so their values look different; duties and temperatures are what changed in substance. Example: the ethylene-oxide hydration reactor now releases 98 kJ per mol reacted, against 96 from published heats of formation (before: 106).
• A stream with no flow (for example a reactor's liquid outlet when everything leaves as vapour) now shows its temperature, pressure and zero flow only, instead of placeholder compositions and properties.
• DWSIM files saved by DWSIM 10 now open with their column feeds on the right trays.
• A liquid mixture of light and heavy hydrocarbons (for example propane with pentane, hexane and decane at 10 bar) could be reported as a vapour, with no liquid density and the wrong enthalpy. A single-phase result is now labelled by the fluid itself, as Flowstead already did for dense gases: that condensate is a liquid at 659.8 kg/m³ (reference equation of state: 660.1).

Install: download flowstead-v2.0.3.apk on your Android phone (Android 8.0 or newer, 64-bit), open it and allow installing from this source.

Coming from a 0.x test build? Those were signed with the public debug key and this release is signed with the release key, so Android can't install it over them: export each project you want to keep (project menu → Export DWSIM file), uninstall the old app, install this one and import the files (Projects → Import DWSIM file). Data-sheet fields and line-sizing criteria are not part of a DWSIM file. Later releases install as updates.

Solves on the phone: DWSIM runs on the device (Settings → Engine → On this phone, the default); the first solve after starting the app takes a few seconds while DWSIM loads. A remote Flowstead engine (docs/engine-setup.md) is optional.

Release certificate SHA-256: d7883cfc24f1cb62db989086d69d217beed109b5b84164ff5394ad9e3e0bb921. flowstead-v2.0.3-mapping.txt de-obfuscates crash reports. Status and known limitations: docs/STATUS.md.

Commit: 0a6ba07