Hallo guys i have  two cavities connected in Parallel which i would like to fill with Polymer (Rubber) one cavity get filled earlier than the other, the equation i used is simple mass flow equation which is m'=roh.V.A [Kg/s] to determine the second cavity Diameter which did not work and i think this is due to viscous effects of rubber and Shore hardness. can someone guide me to analytical calculation more deep of runner and gate system to fill two different volumes in same time by considering shear effects and shore hardness of rubber and other important parameters like Pressure and tempreture?

Thanks in Advance

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