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markusrehm September 12, 2013 04:46

Degree/size of polynomials for thermo and transport (OF 2.2)
 
Hi all,

I would like to have a variable density for water the only combination that allows that to me is:

Code:


Valid rhoThermo types are:

type        mixture                    transport  thermo      equationOfState          specie  energy                 
...
heRhoThermo  pureMixture                polynomial  hPolynomial  icoPolynomial            specie  sensibleEnthalpy       
heRhoThermo  pureMixture                polynomial  hPolynomial  icoPolynomial            specie  sensibleInternalEnergy 
...

So I used the following combination:
Code:

thermoType
{
    type            heRhoThermo;
    mixture        pureMixture;
    transport      polynomial;
    thermo          hPolynomial;
    equationOfState icoPolynomial;
    specie          specie;
    energy          sensibleEnthalpy;
}

That works fine if I define the polynomials like
Code:

CpCoeffs<8>              ( 4200 0 0 0 0 0 0 0 );    //[J/kg/K]
But how would I define a different degree for a polynomial, e.g.
Code:

CpCoeffs<1>              ( 4200 );    //[J/kg/K]
Since I do not need the accuracy, especially for cp and I think the poly evaluation eats up a lot of time.

Regards,
Markus.


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