Computational Fluid Dynamics
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Computational Fluid Dynamics

Computational scientists at ORNL have recently verified that fluid can be pumped without the presence of valves in the system. Specifically, the computational model, using the immersed boundary method, produces net flow in an oval tube with periodic forcing applied to a flexible membrane that forms part of the tube. A startling result is that the direction and magnitude of the flow depends upon the frequency of the forcing function. The research will now be applied to model cardiopulmonary resuscitation. During CPR, it is not yet known whether the heart acts as a pump (through cardiac pumping), or as a passive conduit for valveless pumping (thoracic pumping). There is some echocardiographic evidence to suggest that the mitral valve remains open during CPR in the thoracic pump model. The immersed boundary method will be applied to a heart model to help understand the mechanism of blood flow during CPR and to provide insight into the development of more effective CPR techniques. more info

Researchers

ORNL: Eunok Jung
NYU/Courant: Charles Peskin.