[PF Yu]

Hi, guys.

When inputting the polynomial coefficients in FLUENT 14.5 materials dialog box, I find that the coefficients have only 7 significant digits. Unfortunately, the coefficients in my polynomial have 12 significant digits, so I use two macros (DEFINE_PROPERTY and DEFINE_SPECIFIC_HEAT) to define new materials. The UDF can be compiled in ANSYS FLUENT. However, FLUENT will exit abnormally, once I click the initialize (both standard initialization and hybrid initialization).

The error message and UDF are uploaded. Can anyone anwser me please?

[pakk]

Unfortunately, the coefficients in my polynomial coefficients have 12 significant digits

How is that possible??? Which method can determine 12 significant digits in coefficients? That's like determining the earth's diameter in micrometer precision...

Even if you could do that, it is useless to put that in Fluent, because temperature is not accurate to the twelfth digit. You're lucky if the sixth digit is significant...

[pakk]

In other words: 7 digits really is enough. It is useless to add more. Use the default method, and you're done.