Calculate mixture kinematic pressure.
This routine requires initial total mole density which is defined in
mixture table.
Formula to compute kinematic pressure
here, - species density, \
- species molecular weight ratio, \
- reference mixture number density,\
- reference density.
In tracking,

Description of the method to obtain the variables, here some preset
values might be stored, like the space time function to use or the
required variables.

Number of values to obtain for this variable (vectorized access).

integer,

intent(in)

::

nDofs

Number of degrees of freedom within an element.

real(kind=rk),

intent(out)

::

res(:)

Resulting values for the requested variable.

Linearized array dimension:
(n requested entries) x (nComponents of this variable)
x (nDegrees of freedom)
Access: (iElem-1)fun%nComponentsnDofs +
(iDof-1)*fun%nComponents + iComp

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