Abstract￡o Most injection molded parts are three-dimensional, with complex geometrical configurations and thick￡ˉthin wall sections￡?A 3D simulation model will predict more accurately the filling process than a 2.5D mode1.This paper gives a mathematical model and numeric method based on 3D model￡?in which an equal-order velocity-pressure interpolation method is employed successfully￡?The relation between velocity and pressure is obtained from the discretized momentum equations in order to derive the pressure equation￡?A 3D control volume scheme is employed to track the flow front￡?The validity of the model has been tested through the an analysis of the flow in cavity￡?
Key words￡o three dimension￡?equal-order interpolation￡?simulation￡?injection molding

?aòa:′ó?àêy×￠é?3éDí???·??ê???óD?′?óμ???o???àaoío?±ú?ò±?±úμ????·?￡?a??èy??·????￡Dí??±èá???°??￡Dí??óD?ü??è·μ?ì?3?1y3ì?￡±????ééüá?ò????ùóúèy???￡Díμ?×￠é?3éDíá÷?ˉ?￡?aμ?êy?§?￡Díoíêy?μêμ??￡?°??ù?èoí?1á|í?′?2??μ·?·¨3é1|μ?ó|ó?μ?èy??×￠?ü?￡?aμ??????D￡?′óà?é￠μ??ˉá?·?3ì?D?ò3??1á|oí?ù?èμ?1??μ￡?è?oóμü′úμ?á?D?D?·?3ì?Dμ?μ??1á|·?3ì?￡ó?èy??????ì??y·¨×·×ùá÷?ˉ?°??￡?2￠í¨1y??ày·???à′?μ?÷èy???￡Díμ?óDD§D??￡
1??ü′ê￡oèy???￡Dí μèDò2??μ·¨ ?￡?a ×￠?@@éDí