SOME FIRST ORDER UPWIND TECHNIQUES FORUPDATING THE FLUID DOMAIN IN FIXED MESHSIMULATIONS OF LCM MANUFACTURING PROCESSES

摘要

Liquid Composites Molding (LCM) processes simulation involves a treatment of the flow frontmovement during the mold filling stage. In this work we propose a fixed mesh strategy proceeding inthe whole domain, where a null pressure is prescribed in the empty region and the variationalformulation associated with the Darcy’s equation is enforced in the domain occupied by the fluid. Inorder to capture the flow front location, and in consequence, to predict the fluid domain evolution, anew variable defining the fluid presence is introduced. This variable takes a unit value in the fluiddomain, it is zero in the empty region, and its evolution is governed by a scalar linear advectionequation. This work focuses on the accuracy evaluation of different techniques for solving the linearadvection equation governing the evolution of the fluid presence function.