Second-order fluid

Second-order fluid

A second-order fluid is an extension of the model of a first-order fluid.

It can be written as

:mu_{operatorname{eff(dot gamma, T) = exp left( A_0 + A_1 ln(dot gamma) + A_2 T + A_3 (ln(dot gamma))^2 + A_4 T ln(dot gamma) + A_5 T^2 ight)

where dot gamma is the shear rate, "T" is temperature and A_0 to A_5 are coefficients.

The model is more accurate than the first-order fluid, and is one of the basic models used in Moldex3D and Moldflow simulation.

References

*Kennedy, P. K., "Flow Analysis of Injection Molds". New York. Hanser. ISBN 1569901813


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