I was trying to simulate a conjugate heat transfer problem where the working fluid is water.Physical properties like specific heat,viscosity and thermal conductivity was approximated as a polynomial function of temperature(say third degree polynomial),data taken from NIST

In addition to that if i am giving density also as polynomial function of temperature divergence is detected in the solver-ANSYS FLUENT.How can i overcome this issue?

Actually in my problem over the temp. ranges encountered density varies.

Adarsh