Modification of Poiseuille Flow to a Pulsating Flow Using a Periodically Expanding-Contracting Balloon

Balloon pumps are employed to assist cardiac function in cases of acute myocardial infarction, ventricular arrhythmias, cardiogenic shock, unstable angina, refractory failure, or surgery. Counterpulsation, through increasing the diastolic pressure and reducing systolic pressure, increases coronary perfusion assists heart pump more blood at each contraction. An expanding-contracting balloon, modifying Poiseuille flow a straight circular duct, is examined this study. The balloon spheroid-shaped, with length its minor axis, which perpendicular direction, changing time following sinusoidal law. inlet volume rate steady while that fluid leaves duct varies due presence balloon. For pulsation frequency 60 pulses/min, difference across pulsating exhibits significant phase lagging behind outflow waveform. outlet depends on radius oscillation amplitude computed for range such. field around spheroid, periodically stream presented, exact pattern gradual downstream intensification alongside spheroid body also identified.