Invariant-Based Optimal Fitting IBOF Closure

7 Invariant-Based Optimal Fitting (IBOF) Closure 

The IBOF closure proposed by Chung and Kwon (2002) uses the same idea of the natural closure, approximating the fourth-order orientation tensor in terms of the second-order orientation tensor and its invariants. They showed that there are only three independent among the six p s that appear in Eq. 5.22. They chose P4 and / 6 as the independent parameters and the rest can be expressed in terms 

5 Flow-Induced Alignment in Short-Fiber Reinforced Polymers 

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