3D flow topology behind an aortic valve bioprosthesis

Hasler, David; Obrist, Dominik (4 July 2016). 3D flow topology behind an aortic valve bioprosthesis (Unpublished). In: 18th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics. 04.-07.07.2016.

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We have developed a hydraulic flow loop to replicate the flow conditions in the ascending aorta. The setup features a measurement cell with a silicone phantom of the aortic root. We use a refraction index matched fluid and multi-view camera setup for recording of the pulsatile fluid flow within the silicone phantom. The fluid is seeded with fluorescent particles. Tomographic particle image velocimetry is applied to measure the three-dimensional instantaneous velocity field at specific phases of the pulse. We present results of the instantaneous and the phase averaged velocity field past an aortic bioprosthesis. Based on a Reynolds decomposition of the velocity field the root-mean-square velocity fluctuation can be computed, revealing regions with increased turbulent shear stresses. In general a specific flow topology that can be related to the features of the valve is observed. With this paper we aim to demonstrate the great potential of the presented method to investigate the performance of the valve.

Item Type:

Conference or Workshop Item (Paper)

Division/Institute:

10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Cardiovascular Engineering (CVE) > ARTORG Center - Cardiovascular Engineering (Blood Vessel)
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Cardiovascular Engineering (CVE)

UniBE Contributor:

Hasler, David and Obrist, Dominik

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health
600 Technology > 620 Engineering

Language:

English

Submitter:

David Hasler

Date Deposited:

19 Sep 2016 11:11

Last Modified:

19 Sep 2016 11:11

BORIS DOI:

10.7892/boris.87853

URI:

https://boris.unibe.ch/id/eprint/87853

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