Numerical analysis of liquid—solids suspension velocities and concentrations obtained by NMR imaging

Ding, Jing; Lyczkowski, Robert W.; Sha, W.T.; Altobelli, Stephen A.; Fukushima, Eiichi

doi:10.1016/0032-5910(93)85022-2

Cited by 27 publications

(14 citation statements)

References 21 publications

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“…The governing equations and constitutive relations represent the unique confluence of over 30 years of single-phase cardiovascular modeling (Steinman, 2002) and the nearly 30 years of multiphase theory and CFD modeling as reviewed by Gidaspow (1994). This approach builds upon and extends the work of Lyczkowski and Wang (1992) and Ding et al (1993Ding et al ( , 1995, who analyzed dense negatively and neutrally buoyant two-phase liquid-solids suspension flows.…”

Section: Multiphase Hemodynamic Modelmentioning

confidence: 97%

Multiphase hemodynamic simulation of pulsatile flow in a coronary artery

Jung

Lyczkowski

Panchal

et al. 2006

Journal of Biomechanics

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118

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Section: Multiphase Hemodynamic Modelmentioning

confidence: 97%

Multiphase hemodynamic simulation of pulsatile flow in a coronary artery

Jung

Lyczkowski

Panchal

et al. 2006

Journal of Biomechanics

Self Cite

126

118

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“…22,35 The two-phase CFD model with the non-Newtonian shear-thinning model was initially validated for a neutrally buoyant dense suspension flow. 13,14 The current model in the FLUENT code was successfully applied by reanalyzing NMR slurry measurements 49 for the application of blood flow. 34 A pulsatile inlet velocity waveform with a cardiac period of 0.735 s was used as an inlet boundary condition for both the RBCs and plasma (Fig.…”

Section: Numerical Considerations and Boundary And Initial Conditionsmentioning

confidence: 99%

Hemodynamic Computation Using Multiphase Flow Dynamics in a Right Coronary Artery

2006

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Hemodynamic data on the roles of physiologically critical blood particulates are needed to better understand cardiovascular diseases. The blood flow patterns and particulate buildup were numerically simulated using the multiphase non-Newtonian theory of dense suspension hemodynamics in a realistic right coronary artery (RCA) having various cross sections. The local hemodynamic factors, such as wall shear stress (WSS), red blood cell (RBC) buildup, viscosity, and velocity, varied with the spatially nonuniform vessel structures and temporal cardiac cycles. The model generally predicted higher RBC buildup on the inside radius of curvature. A low WSS region was found in the high RBC buildup region, in particular, on the area of maximum curvature of a realistic human RCA. The complex recirculation patterns, the oscillatory flow with flow reversal, and vessel geometry resulted in RBC buildup due to the prolonged particulate residence time, specifically, at the end of the diastole cycle. The increase of the initial plasma viscosity caused the lower WSS. These predictions have significant implications for understanding the local hemodynamic phenomena that may contribute to the earliest stage of atherosclerosis, as clinically observed on the inside curvatures and torsion of coronary arteries.

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“…The slip boundary condition is prescribed for the dispersed phase along the wall as the first step in the calculations, according to Ding et al40 For the subsequent computations, the parameters of the particle–wall interactions are determined according to the model 41. Regarding these interactions, one of the two cases is possible: sliding collision and nonsliding collision. …”

Section: Boundary Conditionsmentioning

confidence: 99%

Numerical simulation of three‐dimensional gas‐solid particle flow in a horizontal pipe

et al. 2011

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A three-dimensional model of particulate flows using the Reynolds Averaged NavierStokes method is presented. The governing equations of the gas-solids flow are supplemented with appropriate closure equations to take into account all the relevant forces exerted on the solid particles, such as particle-turbulence interactions, turbulence modulation, particle-particle interactions, particle-wall interactions, as well as gravitational, viscous drag, and lift forces. A finite volume numerical technique was implemented for the numerical solution of the problem. The method has been validated by comparing its results with the limited number of available experimental data for the velocity and turbulence intensity of the gas-particle flow. The results show that the presence of particles in the flow has a significant effect on all the flow variables. Most notably, the distribution of all the parameters becomes asymmetric, because of the gravitational effect on the particles and particle sedimentation.

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Numerical analysis of liquid—solids suspension velocities and concentrations obtained by NMR imaging

Cited by 27 publications

References 21 publications

Multiphase hemodynamic simulation of pulsatile flow in a coronary artery

Multiphase hemodynamic simulation of pulsatile flow in a coronary artery

Hemodynamic Computation Using Multiphase Flow Dynamics in a Right Coronary Artery

Numerical simulation of three‐dimensional gas‐solid particle flow in a horizontal pipe

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