Abstract
Planar particle image velocimetry was used to explore the flow behavior of the newly designed 12-cc Penn State pneumatic pediatric assist pump. Wall shear maps complemented the velocity data. Bjork-Shiley Monostrut 17-mm mechanical heart valves were used in the inlet and outlet ports. In comparison with larger Penn State pumps, the 12-cc device is not only smaller but has reduced valve effective orifice areas and more highly angled valve ports. In contrast to results from the larger pumps, the flow field was highly three dimensional during early diastole with poorer penetration by the valve inlet jet. This led to a later start to a "wall washing" rotational pattern. A significant separation region, never before observed, was created upstream of the outlet valve leaflet during late diastole - effectively reducing the area and increasing the pressure drop through the valve. Wall shear maps suggest that regions of low shear might persist throughout the cycle at the bottom of the pump on the outlet side. An attempt to improve the flow field characteristics by exploring different valves, valve orientations and inlet valve angles, systolic/diastolic flow timing, and perhaps a larger outlet valve was planned.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 442-452 |
| Number of pages | 11 |
| Journal | Artificial Organs |
| Volume | 32 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 2008 |
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All Science Journal Classification (ASJC) codes
- Biophysics
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Flow behavior within the 12-cc Penn State pulsatile pediatric ventricular assist device : An experimental study of the initial design. / Manning, Keefe B.; Wivholm, Brandon D.; Yang, Ning; Fontaine, Arnold Anthony; Deutsch, Steven.
In: Artificial Organs, Vol. 32, No. 6, 06.2008, p. 442-452.Research output: Contribution to journal › Article
TY - JOUR
T1 - Flow behavior within the 12-cc Penn State pulsatile pediatric ventricular assist device
T2 - An experimental study of the initial design
AU - Manning, Keefe B.
AU - Wivholm, Brandon D.
AU - Yang, Ning
AU - Fontaine, Arnold Anthony
AU - Deutsch, Steven
PY - 2008/6
Y1 - 2008/6
N2 - Planar particle image velocimetry was used to explore the flow behavior of the newly designed 12-cc Penn State pneumatic pediatric assist pump. Wall shear maps complemented the velocity data. Bjork-Shiley Monostrut 17-mm mechanical heart valves were used in the inlet and outlet ports. In comparison with larger Penn State pumps, the 12-cc device is not only smaller but has reduced valve effective orifice areas and more highly angled valve ports. In contrast to results from the larger pumps, the flow field was highly three dimensional during early diastole with poorer penetration by the valve inlet jet. This led to a later start to a "wall washing" rotational pattern. A significant separation region, never before observed, was created upstream of the outlet valve leaflet during late diastole - effectively reducing the area and increasing the pressure drop through the valve. Wall shear maps suggest that regions of low shear might persist throughout the cycle at the bottom of the pump on the outlet side. An attempt to improve the flow field characteristics by exploring different valves, valve orientations and inlet valve angles, systolic/diastolic flow timing, and perhaps a larger outlet valve was planned.
AB - Planar particle image velocimetry was used to explore the flow behavior of the newly designed 12-cc Penn State pneumatic pediatric assist pump. Wall shear maps complemented the velocity data. Bjork-Shiley Monostrut 17-mm mechanical heart valves were used in the inlet and outlet ports. In comparison with larger Penn State pumps, the 12-cc device is not only smaller but has reduced valve effective orifice areas and more highly angled valve ports. In contrast to results from the larger pumps, the flow field was highly three dimensional during early diastole with poorer penetration by the valve inlet jet. This led to a later start to a "wall washing" rotational pattern. A significant separation region, never before observed, was created upstream of the outlet valve leaflet during late diastole - effectively reducing the area and increasing the pressure drop through the valve. Wall shear maps suggest that regions of low shear might persist throughout the cycle at the bottom of the pump on the outlet side. An attempt to improve the flow field characteristics by exploring different valves, valve orientations and inlet valve angles, systolic/diastolic flow timing, and perhaps a larger outlet valve was planned.
UR - http://www.scopus.com/inward/record.url?scp=44849138443&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=44849138443&partnerID=8YFLogxK
U2 - 10.1111/j.1525-1594.2008.00565.x
DO - 10.1111/j.1525-1594.2008.00565.x
M3 - Article
C2 - 18422800
AN - SCOPUS:44849138443
VL - 32
SP - 442
EP - 452
JO - Artificial Organs
JF - Artificial Organs
SN - 0160-564X
IS - 6
ER -