Numerical and experimental investigation of three-dimensional flow in extrusion dies

The univariant element, Q 1 P 0 , and the multivariant elements, Q 1 + P 0 and R 2 + P 0 , are compared for the numerical simulation of the flow in extrusion dies. The pressure distribution obtained by using the Q 1 P 0 element was found to be afflicted with the checkerboard pressure mode. On the other hand, the multivariant elements, Q 1 + P 0 and R 2 + P 0 , gave accurate and physically reasonable velocity and pressure distributions. The computed values of the pressure drop across extrusion dies matched well with the pressure drop determined experimentally