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Abstract: On the basis of the engineering background of advanced
polymer multi-component molding techniques, the fully three-dimensional
unsteady non-isothermal theoretical model of multiphase-multilayer
cavity filling flow is established. Considering the main reasons of
numerical unsteady and diffusion in solution of the theoretical
model，the corresponding Stabled numerical algorithm with fast
convergence is put forward. The numerical algorithm decreases the needs
of the computer CPU and memory capacity by means of penalty function
method and uncoupling solution of velocity field, temperature field and
fraction of fluid volume. A stabled finite element analysis is
implemented by SUPG method (Streamline upwind /Petrov- Galerkin method),
penalty function method and P1+/P1 three-dimensional finite element etc.
On the base of penalty function method and SUPG method, the fully
three-dimension finite element numerical model of solving N-S equation,
energy equation and the tracing equation of moving front interface and
stratified interface is deduced, and reconstruction technique ofmoving
front interface and stratified interface is discussed in fully
three-dimensional unsteady non-isotherma multiphase-mu-ltilayer
flow. The initiating mechanisms of viscous encapsulation and interface
instability are finally disclosured by numerical modeling technology.
Key
words: Multiphase-multilayer flow Multi-component molding
Numerical simulation Viscous encapsulation Interface instability
CLC No: TQ320
国家自然科学基金资助项目(20274016). Received 20031020, received in revised form
20040616
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