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A new Flyspray task has been opened.  Details are below. 

User who did this - Thomas Fetzer (Thomas Fetzer) 

Attached to Project - DuMuX
Summary - How to deal with solutes?
Task Type - Bug Report
Category - General
Status - New
Assigned To - Thomas Fetzer, Kilian Weishaupt
Operating System - Unspecified
Severity - Medium
Priority - Normal
Reported Version - SVN
Due in Version - 2.9
Due Date - Undecided
Details - There are different ways to deal with solutes and their influence on 
the phase properties.

1) we know it
2) linear mixture (based on moles, e.g. density for ideal gases)
3) assumed linear mixture (based on moles/masses)
4) neglected influence of the minor component

Sometimes we assume case 2) even though we consider the components not to be 
ideal (e.g. density() in h2oairfluidsystem).
For some fluidsystems (e.g. h2oairfluidsystem) we mix case 3) and 4) without 
any reasoning -> thermalConductivity (gas -> dry air -> case 4) but 
heatCapacity (mixed -> case 3).

Should/Could we discuss how to proceed if 1) and 2) is not true?
Does it make sense to agree on default treatment (e.g. always linear mixture 
(molar/mass based) or neglecting for liquid and linear mixing for gas)? Or do 
we allow to mix solutions, formulations in whatever way the author thinks is 
correct?


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http://www.dumux.org/flyspray/index.php?do=details&task_id=291

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