|December 7, 2010, 08:50||
Join Date: Oct 2010
Location: Leoben (Austria)
Blog Entries: 5Rep Power: 25
i 'm working with chtMultiRegionSimpleFoam and want to implement new thermophysicalProperties.
Thats the code i used until now
thermoType hRhoThermo<pureMixture<constTransport<specieThermo<hConstThermo<incompressible>>>>>; mixture water 1 18 1000 4181 0 959e-6 6.62;
and now i want to use that one to make cp / rho temperature dependend
// thermoType hRhoThermo<pureMixture<icoPoly3ThermoPhysics>>; // mixture // water 1 18 // rhoPolynomial (1000 0 0) // 0 // 0 // CpPolynomial (4181 0 0) // muPolynomial (959e-6 0 0) // kappaPolynomial (145e-6 0 0)
Read in the UserGuide about icoPoly4ThermoPhysics - but there is nothing.
Using OF-1.7.x and the code is in the multiRegionLiquid case.
and what 's kappa ? I compare all values with my table of water and think that
mu is the dynamic viscosity - rho and cp is clear but what 's kappa
did someone know how to use this ?
Best reguards Tobi
|December 9, 2010, 11:21||
Join Date: Aug 2009
Location: Braunschweig, Germany
Posts: 200Rep Power: 10
this is a guess; to be sure have a look at the code.
kappa is called isothermal compressibility coefficient and is defined as -1/v * (dv/dp)@T=constant, where v is the spec. volume. Have a look at a thermodynamics book e.g. “Thermodynamik kompakt” page 53 (sorry for the german reference )
Kappa is needed to calculate psi