I´m trying to evaluate momentum and heat transfer phenomena using a model with three equations (continuity, momentum transfer and heat transfer), the calculation doesn´t converges and I guess it is due to the constant parameters values (i.e. specific heat, dynamic viscosity, density, etc.), I´m looking for references to find these values, but It has to be for upper-convected Maxwell fluids. Or also, if it is possible, it could be helpful to know an example of this fluid.