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RISMicrobubble Drag Reduction in Liquid Turbulent Boundary Layers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The interactions between a dense cloud of small bubbles and a liquid turbulent boundary layer are reviewed on the basis of available experimental observations to understand and quantify their ...
Hemodynamics of an End-to-Side Anastomotic Graft for a Pulsatile Pediatric Ventricular Assist Device
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Numerical simulations are performed to investigate the flow within the end-to-side proximal anastomosis of a pulsatile pediatric ventricular assist device (PVAD) to an aorta. The anastomotic model ...
Modifying a Tilting Disk Mechanical Heart Valve Design to Improve Closing Dynamics
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The closing behavior of mechanical heart valves is dependent on the design of the valve and its housing, the valve composition, and the environment in which the valve is placed. One innovative ...
Numerical Study of Blood Flow at the End-to-Side Anastomosis of a Left Ventricular Assist Device for Adult Patients
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: We use an implicit large eddy simulation (ILES) method based on a finite volume approach to capture the turbulence in the anastomoses of a left ventricular assist device (LVAD) to the aorta. ...
An In Vitro Fluid Dynamic Study of Pediatric Cannulae: The Value of Animal Studies to Predict Human Flow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A challenge to the development of pediatric ventricular assist devices (PVADs) is the use of the aortic cannulae attached to the devices. Cannulae used for pediatric application have small ...
Observation and Quantification of Gas Bubble Formation on a Mechanical Heart Valve
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Clinical studies using transcranial Doppler ultrasonography in patients with mechanical heart valves (MHV) have detected gaseous emboli. The relationship of gaseous emboli release and cavitation ...
Wavelet Transforms in the Analysis of Mechanical Heart Valve Cavitation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Cavitation is known to cause blood element damage and may introduce gaseous emboli into the cerebral circulation, increasing the patient’s risk of stroke. Discovering methods to reduce the ...
A New Method for Evaluation of Cavitation Near Mechanical Heart Valves
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Evaluation of cavitation in vivo is often based on recordings of high-pass filtered random high-frequency pressure fluctuations. We hypothesized that cavitation signal components are more appropriately ...
A Detailed Fluid Mechanics Study of Tilting Disk Mechanical Heart Valve Closure and the Implications to Blood Damage
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Hemolysis and thrombosis are among the most detrimental effects associated with mechanical heart valves. The strength and structure of the flows generated by the closure of mechanical heart ...
Wall Shear-Rate Estimation Within the 50cc Penn State Artificial Heart Using Particle Image Velocimetry
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Particle image velocimetry (PIV) has been gaining acceptance as a routine tool to evaluate the flow fields associated with fluid mechanical devices. We have developed algorithms to investigate ...