caa a22 4500 465783805 CHVBK 20180323112002.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF02441969 doi (NATIONALLICENCE)springer-10.1007/BF02441969 Effect of compliance mismatch on flow disturbances in a model of an arterial graft replacement [Elektronische Daten] [F. Miyawaki, T. How, D. Annis] Flow disturbances in a model of an interposition graft in an arterial segment were measured using an ultrasound Doppler velocimeter. The effect of the degree of compliance mismatch between a stiff ‘graft' and compliant ‘arterial' segments was investigated. In steady flow, disturbances were detected when the compliance ratio (stiff to compliant segments) was ≤0·1 and the Reynolds number ≥2200. A recirculation zone just downstream of the distal anastomosis was observed at a Reynolds number ≥2400. Disturbances were also measured under pulsatile flow which consisted of a time-varying component superimposed on a steady flow component. The time-varying flow component was either quasiphysiological or sinusoidal in shape. The Reynolds number was 500 but the frequency parameter varied from 4·2 to 8·5. Significant disturbances were observed for conduits with compliance ratio ≤0·19. The disturbance intensity tended to increase as the compliance ratio decreased and the frequency parameter increased. The magnitude of the disturbance was also greater with the quasiphysiological than the sinusoidal input flow waveform. IFMBE, 1990 Arteries nationallicence Compliance nationallicence Flow nationallicence Grafts nationallicence Model nationallicence Miyawaki F. Institute of Medical & Dental Bioengineering, The University of Liverpool, L69 3BX, Liverpool, UK aut How T. Institute of Medical & Dental Bioengineering, The University of Liverpool, L69 3BX, Liverpool, UK aut Annis D. Institute of Medical & Dental Bioengineering, The University of Liverpool, L69 3BX, Liverpool, UK aut Medical and Biological Engineering and Computing Kluwer Academic Publishers 28/5(1990-09-01), 457-464 0140-0118 28:5<457 1990 28 11517 https://doi.org/10.1007/BF02441969 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02441969 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Miyawaki F. Institute of Medical & Dental Bioengineering, The University of Liverpool, L69 3BX, Liverpool, UK aut NATIONALLICENCE 700 1- How T. Institute of Medical & Dental Bioengineering, The University of Liverpool, L69 3BX, Liverpool, UK aut NATIONALLICENCE 700 1- Annis D. Institute of Medical & Dental Bioengineering, The University of Liverpool, L69 3BX, Liverpool, UK aut NATIONALLICENCE 773 0- Medical and Biological Engineering and Computing Kluwer Academic Publishers 28/5(1990-09-01), 457-464 0140-0118 28:5<457 1990 28 11517 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer