Computer-implemented simulation method and non-transitory computer medium capable of predicting fiber orientation for use in a molding process

A non-transitory computer medium containing computer instructions stored therein for causing a computer processor to perform operations for use in a molding process simulation, the operations comprising steps of:

• specifying a simulating domain corresponding to a genuine domain in a mold disposed on a molding machine, wherein the genuine domain has a mold cavity to be filled with a fluid having fibers from the molding machine to prepare a molding product;
• performing a virtual molding to generate a shear rate distribution of the fluid having the fibers in the simulating domain while using a molding condition for the molding machine;
• and
• calculating an orientation distribution of the fibers by taking into consideration an anisotropic rotary diffusion effect of the fibers and the shear rate distribution, wherein the anisotropic rotary diffusion effect is determined by taking into consideration a square of a rate-of-deformation tensor.