... velocities and stresses. By manipulating the valve housing, we gained optical access to a previously inaccessible region of the flow. Laser Doppler velocimetry and particle image velocimetry were used to characterize the flow regime and help to identify the key design characteristics responsible for high...

... laser Doppler velocimetry heart valve fluid mechanics Calcific aortic valve disease is a highly prevalent disease affecting up to 2% of the elderly population [( 1 )]. To date, the exact mechanism of the disease is unclear; however, various ex vivo studies suggest that mechanical forces play...

... cycle, where cavitation is known to occur and blood damage is most severe. Closure of the tilting disk valve was studied in a “single shot” chamber driven by a pneumatic pump. Laser Doppler velocimetry was used to measure all three velocity components over a 30 ms period encompassing the initial valve...