The hydrodynamic and thermal conditions associated with the flow of a non-Newtonian fluid (polystyrene), which is heated volumetrically by electric radio-frequency excitation, is considered. The fluid is forced through a two-dimensional channel having local, stationary blocks, which restrict the flow and are maintained at a constant rms voltage potential. Detailed and overall system response is examined for a range of fluid velocities, restriction sizes, and radio-frequency heating rates. This heating reduces the pressure drop induced by the restriction and alters the flow structure, suggesting that it may be used to control and augment conventional injection molding operations.

Issue Section:
Forced Convection
Keywords:
Augmentation and Enhancement, Materials Processing and Manufacturing Processes, Non-Newtonian Flows and Systems
Topics:
Heat transfer, Heating, Non-Newtonian flow, Flow (Dynamics), Fluids, Excitation, Injection molding, Manufacturing, Materials processing, Non-Newtonian fluids, Pressure drop
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