Simulation of wall slip in a rubber mixer

Modified weighted residual statement = Original weighted residual statement + 

G is a multiplier which is zero at locations where slip condition does not apply and is a sufficiently large number at the nodes where slip may occur. It is important to note that, when the shear stress at a wall exceeds the threshold of slip and the fluid slides over the solid surface, this may reduce the shearing to below the critical value resulting in a renewed stick. Therefore imposition of wall slip introduces a form of non-linearity into the flow model which should be handled via an iterative loop. The slip coefficient (i.e. /I in the Navier s slip condition given as Equation (3.59) is defined as 

MODELS REPRESENTING SELECTED SEGMENTS OF A LARGE DOMAIN 159 = (5.18) 

As comparison of the simulated temperature fields shows, fluid slippage results in temperature peak shifting from a location furthest away from the 

4 MODELS BASED ON DECOUPLED FLOW EQUATIONS -SIMULATION OF THE FLOW INSIDE A CONE-AND-PLATE RHEOMETER 

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