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Transient flow characteristics in piezoelectric micropumps with flat diffuser/nozzle tubes were studied by numerical simulation. There is phase difference between velocity and pressure at high frequency. The effect of Reynold number, diffuser angle and excitation frequency on phase difference was studied. Pressure loss coefficient and tube efficiency were discussed as Womersley number ranging from...
In order to investigate internal flow characteristics and the rotor-stator interaction in the flow passage components of pump under off-design conditions, the paper selected a centrifugal pump as computational model whose specific speed is 129. Based on the SST k-ω turbulence model, the transient numerical simulation of internal flow through the centrifugal impeller and volute was conducted by using...
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