Imperial College London

Professor Xiao Yun Xu

Faculty of EngineeringDepartment of Chemical Engineering

Professor, Biofluid Mechanics & Director of Graduate School
 
 
 
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Contact

 

yun.xu Website

 
 
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Location

 

407ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

242 results found

King E, Xu XY, Hughes AD, Long Q, Thom SA, Parker KHet al., 2002, Quantification of the non-planarity of the human carotid bifurcation, BIORHEOLOGY, Vol: 39, Pages: 419-424, ISSN: 0006-355X

Journal article

Long Q, Xu XY, Kohler U, Robertson MB, Marshall I, Hoskins Pet al., 2002, Quantitative comparison of CFD predicted and MRI measured velocity fields in a carotid bifurcation phantom, BIORHEOLOGY, Vol: 39, Pages: 467-474, ISSN: 0006-355X

Journal article

Xu XY, Zhao SZ, Ariff B, Long Q, Hughes AD, Thom SAet al., 2001, CFD and FE stress analysis of the carotid bifurcation based on individual anatomical and flow data acquired using MRI and ultrasound, American Society of Mechanical Engineers, Bioengineering Division (Publication) BED, Vol: 50, Pages: 621-622, ISSN: 1071-6947

The carotid bifurcation based on individual anatomical and flow data acquired using MRI and ultrasound was analyzed by using finite element (FE) stress analysis code. Blood was assumed to be a Newtonian fluid with a constant viscosity. The results suggested that low wall shear stress and high mechanical stress act together to predispose a particular site to atheroma formation.

Journal article

Köhler U, Marshall I, Robertson MB, Long Q, Xu XY, Hoskins PRet al., 2001, MRI measurement of wall shear stress vectors in bifurcation models and comparison with CFD predictions., J Magn Reson Imaging, Vol: 14, Pages: 563-573, ISSN: 1053-1807

Steady fluid flow was studied in a simple bifurcation model and in a physiologically realistic model of the human carotid bifurcation. Wall shear stress (WSS) vectors were calculated from phase-contrast (PC) magnetic resonance imaging (MRI) measurements of the velocity field. Velocity measurements in the inflow regions were also used as boundary conditions for computational fluid dynamics (CFD) calculations of WSS, which were compared with those derived from MRI alone. In regions of well-behaved flow, MRI and CFD estimates of WSS were in good general agreement. In regions of disturbed flow, for example near the bifurcation, the quality of the MRI measurements was sufficient for reliable calculation of WSS vectors when a sensitive surface coil was used. The combination of MRI and CFD would seem to be a powerful technique for the investigation of flow phenomena.

Journal article

Augst AD, Barratt DC, Hughes AD, Thom SAM, Xu XYet al., 2001, CFD model of a human carotid artery bifurcation reconstructed from 3D ultrasound data, HYPERTENSION, Vol: 38, Pages: 977-977, ISSN: 0194-911X

Journal article

Long Q, Xu XY, Ramnarine KV, Hoskins Pet al., 2001, Numerical investigation of physiologically realistic pulsatile flow through arterial stenosis, JOURNAL OF BIOMECHANICS, Vol: 34, Pages: 1229-1242, ISSN: 0021-9290

Journal article

Zhao SZ, Zambanini A, Long Q, Xu XY, Hughes AD, Thom SAet al., 2000, Difference in anatomical features of the femoral artery between male and female, HYPERTENSION, Vol: 36, Pages: 666-666, ISSN: 0194-911X

Journal article

Xu XY, Zhao SZ, Ariff B, Long Q, Hughes AD, Thorn SA, Stanton AVet al., 2000, Shear stress and mechanical forces in the walls of carotid arteries, HYPERTENSION, Vol: 36, Pages: 664-664, ISSN: 0194-911X

Journal article

Zhao SZ, Xu XY, Hughes AD, Thom SA, Stanton AV, Ariff B, Long Qet al., 2000, Blood flow and vessel mechanics in a physiologically realistic model of a human carotid arterial bifurcation, JOURNAL OF BIOMECHANICS, Vol: 33, Pages: 975-984, ISSN: 0021-9290

Journal article

Xu XY, Zhao SZ, Long Q, Ariff B, Hughes AD, Thom SAet al., 2000, 3D reconstruction of flow patterns and shear stress in human arteries, JOURNAL OF PHYSIOLOGY-LONDON, Vol: 525, Pages: 4P-4P, ISSN: 0022-3751

Journal article

Long Q, Xu XY, Bourne M, Griffith TMet al., 2000, Numerical study of blood flow in an anatomically realistic aorto-iliac bifurcation generated from MRI data, MAGNETIC RESONANCE IN MEDICINE, Vol: 43, Pages: 565-576, ISSN: 0740-3194

Journal article

Long Q, Xu XY, Ariff B, Thom SA, Hughes AD, Stanton AVet al., 2000, Reconstruction of blood flow patterns in a human carotid bifurcation: A combined CFD and MRI study, JOURNAL OF MAGNETIC RESONANCE IMAGING, Vol: 11, Pages: 299-311, ISSN: 1053-1807

Journal article

Xu XY, Long Q, Bourne M, Griffith TMet al., 1999, On the geometrical and flow characteristics of the human aortic bifurcation, American Society of Mechanical Engineers, Bioengineering Division (Publication) BED, Vol: 42, Pages: 725-726

The effect of branching non-planarity on the local blood flow pattern and wall shear stress distribution was investigated using a combination of magnetic resistance (MR) imaging and computational fluid dynamics (CFD) techniques. MR measurements of the vascular geometry and velocities at selected sites of the aortic bifurcation of a healthy subject were made. Flow patterns at the bifurcation were reconstructed using a CFD solver. A comparison was also made with results obtained for the same bifurcation geometry but with a planar assumption.

Journal article

Starmans-Kool M, Stanton A, Zhao S, Xu Y, Hughes A, Thom S, Struijker Het al., 1999, Carotid haemodynamics and the effects of salt, HYPERTENSION, Vol: 34, Pages: 706-706, ISSN: 0194-911X

Journal article

Zhao SZ, Xu XY, Collins MW, Stanton AV, Hughes AD, Thom SAet al., 1999, Flow in carotid bifurcations: effect of the superior thyroid artery, MEDICAL ENGINEERING & PHYSICS, Vol: 21, Pages: 207-214, ISSN: 1350-4533

Journal article

Sun YD, Sun YF, Sun Y, Xu XY, Collins MWet al., 1999, Visualisation of dynamic flow birefringence of cardiovascular models, International Conference on Optical Methods and Data Processing in Heat and Fluid Flow, Publisher: ELSEVIER SCI LTD, Pages: 103-112, ISSN: 0030-3992

Conference paper

Zhao SZ, Xu XY, Collins MW, Stanton AV, Hughes AD, Thom SAet al., 1999, The convergence technique in numerical solutions of coupled fluid-wall problems, Conference on Cardiovascular Flow Modelling and Measurement with Application to Clinical Medicine, Publisher: OXFORD UNIVERSITY PRESS, Pages: 125-134

Conference paper

Zhao SZ, Collins MW, Long Q, Xu XYet al., 1999, The application of computational fluid dynamics and solid mechanics to haemodynamics in arterial organs and to related problems, Conference on Cardiovascular Flow Modelling and Measurement with Application to Clinical Medicine, Publisher: OXFORD UNIV PRESS, Pages: 83-112

Conference paper

Xu XY, Long Q, Collins MW, Bourne M, Griffith TMet al., 1999, Reconstruction of blood flow patterns in human arteries, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART H-JOURNAL OF ENGINEERING IN MEDICINE, Vol: 213, Pages: 411-421, ISSN: 0954-4119

Journal article

Q Long, XY Xu, MW Collins, 1999, Simulation of flow in human arterial bifurcations using a combination of CFD and MRI techniques, Haemodynamics of arterial organs – comparison of computational predictions with in vivo and in vitro data, Editors: Xu, Collins, Southampton, UK, Publisher: WIT Press, Pages: 185-238, ISBN: 9781853125096

Book chapter

Zhao SZ, Xu XY, Collins MW, 1998, The numerical analysis of fluid-solid interactions for blood flow in arterial structures - Part 1: a review of models for arterial wall behaviour, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART H-JOURNAL OF ENGINEERING IN MEDICINE, Vol: 212, Pages: 229-240, ISSN: 0954-4119

Journal article

Zhao SZ, Xu XY, Collins MW, 1998, The numerical analysis of fluid-solid interactions for blood flow in arterial structures - Part 2: development of coupled fluid-solid algorithms, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART H-JOURNAL OF ENGINEERING IN MEDICINE, Vol: 212, Pages: 241-252, ISSN: 0954-4119

Journal article

Long Q, Xu XY, Collins MW, Griffith TM, Bourne Met al., 1998, The combination of magnetic resonance angiography and computational fluid dynamics: A critical review, CRITICAL REVIEWS IN BIOMEDICAL ENGINEERING, Vol: 26, Pages: 227-274, ISSN: 0278-940X

Journal article

Q Long, XY Xu, MW Collins, TM Griffithet al., 1998, Magnetic resonance image processing and structured grid generation in a human aortic bifurcation, Computer Methods and Program in Biomedicine, Vol: 56, Pages: 249-259

Journal article

Q Long, XY Xu, MW Collins, TM Griffith, M Bourneet al., 1997, Fluid dynamics of the aortic bifurcation using magnetic resonance imaging and computational fluid dynamics, Internal Medicine (Clinical and Laboratory), Vol: 5, Pages: 35-42

Journal article

SZ Zhao, XY Xu, MW Collins, 1997, Flow patterns in stented arteries, Internal Medicine (Clinical and Laboratory), Vol: 5, Pages: 29-34

Journal article

XY Xu, MW Collins, CJH Jones, 1997, A problem-oriented approach to the numerical modelling of haemodynamic problems, Advances in Eng. Software, Vol: 28, Pages: 365-377

Journal article

XY Xu, MW Collins, TM Griffith, 1997, Shear stress, wall compliance and their relationship to endothelium-derived relaxing factor, Internal Medicine (Clinical and Laboratory), Vol: 5, Pages: 43-47

Journal article

XY Xu, MW Collins, 1995, Numerical modelling of blood flow in compliant arteries and arterial bifurcations, Biofluid Mechanics, Editors: Power, Publisher: Computational Mechanics Publications, Pages: 55-94

Book chapter

XY Xu, MW Collins, 1994, Studies of blood flow in arterial bifurcations using Computational Fluid Dynamics, J. Eng. in Medicine, Vol: 208, Pages: 163-175

Journal article

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