Article
Engineering, Multidisciplinary
Catalina Farias, Camilo Bayona-Roa, Ernesto Castillo, Roberto C. Cabrales, Ricardo Reyes
Summary: This paper evaluates the accuracy and performance of a stabilized finite element Reduced Order Modelling (ROM) approach for simulating pulsatile blood flows. The method estimates fluid flow parametric solutions by considering parameters such as hematocrit percentage and heart rate. The results demonstrate that the proposed approach is a valuable computational tool for simulating complex fluid flow hemodynamics and can be applied to clinical decision-making.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2023)
Article
Mechanics
Andre Pincot, F. John Burpo, Elahe Javadi, Safa Jamali, Sean Farrington, Matthew J. Armstrong
Summary: A distinctive stress hysteresis phenomenon is observed in human blood rheology, which is related to the longer characteristic time of shear-induced rouleaux breakdown. The hysteresis data is used to fit parameters of the t-ESSTV model, which can predict various blood flow characteristics under different conditions. The correlation between fitting parameters and physiological data helps interpret the model behavior in physical terms.
Article
Physics, Multidisciplinary
Supun S. Mohottalalage, Manjula Senanayake, Joel T. Clemmer, Dvora Perahia, Gary S. Grest, Thomas O'Connor
Summary: The response to elongational flow is important in soft matter and has implications in various technologies. In this study, the effects of associating groups on the structure and dynamics of linear polymer melts under uniaxial elongation were investigated using molecular dynamics simulations.
Article
Polymer Science
Dennis Kleinschmidt, Florian Bruening, Jonas Petzke
Summary: This paper investigates the applicability of the high-pressure capillary rheometer (HPCR) and introduces a methodology based on ramp tests to collect wall slip-free steady-state shear viscosity data under isothermal conditions for rubber compounds.
Article
Chemistry, Physical
Konstantinos Giannokostas, Yannis Dimakopoulos, Andreas Anayiotos, John Tsamopoulos
Summary: This study focuses on the in-silico investigation of steady-state blood flow in straight microtubes, incorporating advanced constitutive modeling for human blood and blood plasma. The research demonstrates the microstructural configuration of blood in steady-state conditions, revealing highly aggregated blood in narrow tubes, and the extension of plasmatic proteins in the flow direction at high pressure-gradients generating large axial normal stresses. Predictions of normal stress at both the blood/plasma interface and the tube wall show significant differences in magnitude and type of variation, with INS linearly decreasing from 4.5 to 2 Pa and WNS exponentially decreasing from 50 mPa to zero with decreasing tube radius.
Article
Engineering, Mechanical
Dongjing He, Dongjune A. Kim, David N. Ku, Yuhang Hu
Summary: This study quantitatively characterizes the mechanical properties of blood clots using rheology and indentation measurements. The research finds that blood clots exhibit both viscoelastic and poroelastic behavior. The viscoelasticity is determined through shear rheology measurements, while the poroelastic properties are obtained through indentation tests. The study also discusses the contribution of solvent migration and viscoelastic effects to the time-dependent responses of blood clots.
EXTREME MECHANICS LETTERS
(2022)
Article
Mathematics, Applied
Qi Chen, Di Wu, Zhifei Zhang
Summary: This paper studies the stability of shear flows of Prandtl type in the steady Navier-Stokes equations and employs a direct energy method combined with the compactness method to solve the problem.
SCIENCE CHINA-MATHEMATICS
(2023)
Review
Biochemical Research Methods
Elisa M. Wasson, Karen Dubbin, Monica L. Moya
Summary: Interest in replicating in vivo phenomena in vitro using organ-on-a-chip technology has increased rapidly, along with attention to the types of fluid flow experienced in the body. Organ-on-a-chip platforms offer distinct advantages over in vivo models in terms of human relevance, cost, and control of inputs, especially in replicating biomechanical cues in tissues and organs. It is essential for engineered in vitro platforms to capture the complex and unique flow profiles experienced in the body, which are intimately tied with organ function.
Article
Engineering, Civil
Cristiana Di Cristo, Oreste Fecarotta, Michele Iervolino, Andrea Vacca
Summary: This paper investigates the force produced by a dam-break wave of mud impacting against a rigid wall and analyzes it using numerical methods. The results show that there exists a minimum wall distance, beyond which the peak force does not increase anymore. The paper also provides an estimation of the maximum peak force for wall distances smaller than the minimum value.
JOURNAL OF HYDROLOGY
(2022)
Article
Physics, Multidisciplinary
Matthew Macaulay, Pierre Rognon
Summary: This study examines the distribution of contact forces in dense granular flows and finds that higher magnitude contact forces exist in faster flows with stiffer grains. A proposed physical mechanism explains this rate-dependent force transmission, establishing a relationship between contact forces and grain velocities. This analysis provides a starting point for unifying a range of continuum models based on either contact forces or grain velocities.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Hugo Perrin, Matthieu Wyart, Bloen Metzger, Yoel Forterre
Summary: The study found that thin frictionless granular layers lack hysteresis in avalanche angle, but stability increases as the layer gets thinner. Steady rheological laws obtained for different layer thicknesses can be collapsed into a unique master curve, supporting the idea that nonlocal effects are a consequence of typical finite-size effects associated with the presence of a critical point.
PHYSICAL REVIEW LETTERS
(2021)
Article
Mechanics
Anika Jain, Eric S. G. Shaqfeh
Summary: The study investigates the transient and steady shear rheology of rigid particle suspensions in Boger fluids using 3D numerical simulations and experiments. Results show that per-particle viscosity and primary stress coefficients increase monotonically with different particle volume fractions and Weissenberg numbers. Longer strains are needed to achieve steady state at higher particle volume fractions and Weissenberg numbers, according to simulations and experiments.
JOURNAL OF RHEOLOGY
(2021)
Article
Mechanics
Yul Hui Shim, Simon A. Rogers
Summary: Graphene oxide (GO) has gained attention for its unique properties and applications in materials science and engineering, including DIW printing of three-dimensional structures. Understanding the yielding behavior of GO colloids is important for developing efficient and effective printing inks. In this study, the yielding behavior of GO colloids was investigated through oscillatory rheology, and the recoverable and unrecoverable responses were analyzed to determine the storage and dissipation of energies. This study contributes to the understanding of out-of-equilibrium rheological physics and provides guidelines for energy efficiency in soft material printing.
Article
Engineering, Chemical
Nazanin Ghods, Payam Poorsolhjouy, Marcial Gonzalez, Stefan Radl
Summary: The discrete element method (DEM) is used to study the flow behavior of dense configurations of soft particles and a new formulation of the multi-contact force closure for DEM is developed. The results show significant improvement over the existing model and reveal the dependence of stress on the Poisson's ratio. Simulations are performed to investigate the effect of particle volume fraction and shearing speed. A response surface for pressure in a sheared particle bed is provided for calibrating DEM model parameters.
Article
Engineering, Civil
Cristiana Di Cristo, Michele Iervolino, Tommaso Moramarco, Andrea Vacca
Summary: The study investigated the applicability conditions of the Diffusive Wave Model (DWM) for predicting shear-thinning fluid mud-flows, finding that DWM is safe to use in cases of underestimation and acceptable for negative errors less than 5%. The performance of DWM depends on the rheological index of the fluid, and its applicability is determined by the value of the kinematic wave number.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Chemical
Paul M. Mwasame, Antony N. Beris, R. Betrum Diemer, Norman J. Wagner
Article
Engineering, Chemical
Matthew J. Armstrong, Antony N. Beris, Norman J. Wagner
Article
Hematology
Jeffrey S. Horner, Antony N. Beris, Donna S. Woulfe, Norman J. Wagner
CLINICAL HEMORHEOLOGY AND MICROCIRCULATION
(2018)
Article
Mechanics
Kostas D. Housiadas, Gaurab Samanta, Antony N. Beris
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2018)
Article
Mechanics
Jeffrey S. Horner, Matthew J. Armstrong, Norman J. Wagner, Antony N. Beris
JOURNAL OF RHEOLOGY
(2018)
Article
Mechanics
Paul M. Mwasame, Norman J. Wagner, Antony N. Beris
Article
Mechanics
Paul M. Mwasame, Norman J. Wagner, Antony N. Beris
Article
Thermodynamics
Paul M. Mwasame, Norman J. Wagner, Antony N. Beris
JOURNAL OF NON-EQUILIBRIUM THERMODYNAMICS
(2019)
Article
Mechanics
Jeffrey S. Horner, Matthew J. Armstrong, Norman J. Wagner, Antony N. Beris
JOURNAL OF RHEOLOGY
(2019)
Article
Mechanics
Kostas D. Housiadas, Antony N. Beris
Article
Mechanics
Spyros D. Gkormpatsis, Evgenios A. Gryparis, Kostas D. Housiadas, Antony N. Beris
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2020)
Article
Mechanics
Soham Jariwala, Jeffrey S. Horner, Norman J. Wagner, Antony N. Beris
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2020)
Article
Physics, Multidisciplinary
Soham Jariwala, Norman J. Wagner, Antony N. Beris
Summary: This work develops a thermodynamically consistent microscopic model for a suspension of aggregating particles under arbitrary, inertia-less deformation. The model takes into account the lognormal distribution of the aggregate size population, the aggregation and breakup processes, and the viscoelastic description of the elastic network of the particle aggregates. The model predictions are consistent with the observed rheological behavior of typical systems of aggregating particles. Additionally, an expression for the total entropy production is provided to evaluate the importance of dissipative phenomena in flow processes.
Article
Engineering, Manufacturing
David D. Phan, Jeffrey S. Horner, Zachary R. Swain, Antony N. Beris, Michael E. Mackay
ADDITIVE MANUFACTURING
(2020)
Article
Mechanics
Paul M. Mwasame, Norman J. Wagner, Antony N. Beris
JOURNAL OF FLUID MECHANICS
(2017)