I need thermophysical and electrical oil properties to investigation of DC discharge in oil.
Are multicomponent mixture models effective and precise in such calculations? If yes, what MC-modells can You suggest?
Can somebody advice something?
Thank you a lot in advance!
Hello Stepan Terekhov ,
Is oil even still oil at 30,000 K?
Regards,
Tom Cuff
Sure its not oil. I was not total correct in question. I mean also how can I simulate thermodynamic and transport properties of oil-forming-gases mixture
What kind of oil? Purified paraffine oil is different from oil containing aromatic compounds; traces of water can change the transport and electric properties drastically. Moreover, there will be chemical decomposition beyond 800 K.
Good afternoon, Prof.Dr.Ulrich Deiters
Thank You for Your answer and question!
In first approach I investgate clear transformator-oil.
Chemical thermal decomposotion must be in my experiment, phase transitions liquid-gas, gas-liquid too.
I haven't found any experimets, tables, data about properties of oil in such unusual condition. But I have found a mixture-modells for gas properties - for me now it is a main approach, but I think it should be inaccurate.
Maybe should I try a kinetic approach?
You will probably need a chemical characterization first. Some years ago transformer oils often contained polychlorinated aromatic compounds (very toxic). I do not know what is used nowadays.
Viscosity and heat conduction can be calculated from the so-called friction theory. This theory, however, needs an equation of state, and for this one has to know some thermodynamic characteristics – evaporation curves, chromatograms, etc.
Ulrich Deiters, excuse me! I was wrong, its not transformator oil. Its C18H38 .
I think it should disscociate this way: C18H38→10H2+ 5C2H2+ 2CH4+ 6C
You can find many physicochemical data for a great number of compounds, particulary n-octadecane, in this book : "Chemical properties handbook" by Carl l. Yaws, McGraw-Hill, 1999.
The variation of the properties with temperature is also given.
Also, in the Wed, there is some giving data for n-octadecane. For example this one :
https://pubchem.ncbi.nlm.nih.gov/compound/octadecane
http://www.chemicalland21.com/industrialchem/organic/n-OCTADECANE.htm
https://www.chemeo.com/cid/68-847-7/Octadecane
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